For a few months of the year, the Alaskan Arctic becomes flooded with birds. From shorebirds to waterfowl, these avians arrive in the spring to breed, nest, and raise their young, and to take advantage of the ample plants and prey (invertebrates and other animals) that thrive in Alaska’s short summers. They do it today, and they did it around 73 million years ago, too. Documenting the earliest evidence ever discovered of birds breeding and nesting in the Arctic, a new study in Science describes a collection of avian fossils and fossil fragments from around 73 million years ago. The collection comprises dozens of bones and teeth from adult and baby birds, and it shows that avians similar to modern shorebirds and waterfowl reproduced in the Arctic in the Cretaceous period, when dinosaurs still dominated the Alaskan terrain.“Birds have existed for 150 million years,” said Lauren Wilson, a study author and a student at Princeton University, who worked on the study while at the University of Alaska Fairbanks, according to a press release. “For half of the time they have existed, they have been nesting in the Arctic.”An Arctic NurseryA fossil fragment of a beak from a baby bird. (Image Credit: Photo by Pat Druckenmiller)Millions of birds travel to the Arctic, and they’ve been traveling there for millions of years. (In fact, some 250 species of birds migrate to Alaska for the spring and summer breeding and nesting seasons today.) But up until now, the earliest traces of birds reproducing in the Arctic dated back to around 47 million years ago, following the disappearance of the non-avian dinosaurs from the Arctic terrain. Now, the authors of the new study claim that birds and non-avian dinosaurs shared the Alaskan Arctic as far back as the Cretaceous period. Sifting bones and teeth from the sediment of Alaska’s Prince Creek Formation, the authors identified an assortment of Cretaceous fossils and fossil fragments, which resembled the remains of modern gulls, geese, ducks, and loons. That the specimens belonged to adult and baby birds suggests that these species were breeding, nesting, and raising their young in Alaska, more than 20 million years earlier than previously thought. “The Arctic is considered the nursery for modern birds,” said Pat Druckenmiller, another study author and a professor at the University of Alaska Fairbanks, according to a press release. “They have been doing this for 73 million years.”Finding Fossils, From Adult and Baby BirdsStudy authors Joe Keeney, Jim Baichtal, and Patrick Druckenmiller in Alaska. (Image Credit: Photo by Lauren Wilson) According to the authors, the bones and teeth of adult birds are often too fragile to survive in the fossil record, and those from baby birds are even more delicate. “Finding bird bones from the Cretaceous is already a very rare thing,” Wilson said in the release. “To find baby bird bones is almost unheard of. That is why these fossils are significant.” Though the majority of specimens that are taken from the Prince Creek Formation are large, the study authors opted to collect the smaller fossils and fossil fragments that most other studies miss. To do so, they inspected screened sediment with a microscope, which revealed their tiny finds. “We put Alaska on the map for fossil birds,” Druckenmiller said in the release. “It wasn’t on anyone’s radar.”Whether the find includes bones and teeth from the Neornithes — or the modern birds — is yet to be determined, though the authors stress that some of the fossils and fossil fragments feature skeletal and dental traits, such as fused leg bones and toothless jawbones, that are seen only in modern birds. “If they are part of the modern bird group, they would be the oldest such fossils ever found,” Druckenmiller said in the release. “But it would take us finding a partial or full skeleton to say for sure.”Article SourcesOur writers at Discovermagazine.com use peer-reviewed studies and high-quality sources for our articles, and our editors review for scientific accuracy and editorial standards. Review the sources used below for this article:Science. Arctic Bird Nesting Traces Back to the CretaceousSam Walters is a journalist covering archaeology, paleontology, ecology, and evolution for Discover, along with an assortment of other topics. Before joining the Discover team as an assistant editor in 2022, Sam studied journalism at Northwestern University in Evanston, Illinois.

Europa, a moon of Jupiter, has long been one of the most exciting targets in the search for life beyond Earth. Many scientists believe that an ocean lies below its icy surface, potentially hosting geologic activity capable of supporting life, but what happens on the moon’s seafloor is still largely a mystery. Although discussions on Europa are mostly centered around this hidden ocean, the shell of ice that envelops the moon has its own surprises. A study recently published in The Planetary Science Journal suggests that Europa’s surface ice is constantly changing. The evidence explored in the study paints a better picture of Europa’s outermost layer, and it may even reveal the interior processes that shape the moon’s unique structure. Europa's Surface IceEuropa has the smoothest surface out of any known object in our Solar System, but it’s far from lacking variety. The surface is rife with distinct geologic features, such as ridges, plains, and cracks, that cross over each other. Their disorderly appearance is linked to a fitting name, “chaos terrain.”Some regions with chaos terrain also provide insight on Europa’s surface ice. Most of Europa’s surface is made of amorphous ice, which lacks a crystalline structure. Scientists previously believed that Europa’s surface was entirely covered by a thin layer of amorphous ice, and that below this was crystalline ice (the form that most ice on Earth takes). However, the researchers involved with the new study have confirmed that certain areas of Europa’s surface contain crystalline ice, aligning with spectral data captured by the James Webb Space Telescope (JWST). This same ice also appears below the surface in these regions as well. “We think that the surface is fairly porous and warm enough in some areas to allow the ice to recrystallize rapidly,” said lead author Richard Cartwright, a spectroscopist at Johns Hopkins University, in a statement.Activity in the OceanA few other factors have convinced the researchers that an ocean exists below Europa's icy surface. The regions where ice recrystallizes show evidence of sodium chloride (what we know as table salt), carbon dioxide, and hydrogen peroxide. “Our data showed strong indications that what we are seeing must be sourced from the interior, perhaps from a subsurface ocean nearly 20 miles (30 kilometers) beneath Europa’s thick icy shell,” said author Ujjwal Raut, a program manager at the Southwest Research Institute. “This region of fractured surface materials could point to geologic processes pushing subsurface materials up from below.”The Europa Clipper's MissionAlthough Europa and its subsurface ocean will be a crucial target for future space exploration, some scientists have expressed doubts regarding its capacity to sustain life. A series of obstacles could make finding life on Europa more difficult. At an American Geophysical Union conference last year, scientists reported that the ice layer covering the moon's surface is thicker than expected, indicating that there may not be enough heat or activity in the subsurface ocean to support life. Scientists aren’t yet sure if an abundance of hydrothermal vents or seafloor volcanoes sit at the bottom of the ocean — these features have been crucial in driving life on our own planet. Observations of Europa haven’t fully confirmed the existence of plumes, either, which would be a clear sign that material from the ocean could be transported to the surface. About 5 years from now, in 2030, scientists will get an unprecedented view of Europa as NASA's Europa Clipper approaches the icy moon. Launched last October, the Europa Clipper will reveal many secrets that still surround the moon's surface and the ocean below. Among its various objectives, the mission will look for plumes, which would be able to eject microbes — if they truly do exist on the moon — into space for the Europa Clipper to examine. Article SourcesOur writers at Discovermagazine.com use peer-reviewed studies and high-quality sources for our articles, and our editors review for scientific accuracy and editorial standards. Review the sources used below for this article:The Planetary Science Journal. JWST Reveals Spectral Tracers of Recent Surface Modification on EuropaThe Planetary Society. Europa, Jupiter’s possible watery moonThe Planetary Society. Could Europa Clipper find life?Jack Knudson is an assistant editor at Discover with a strong interest in environmental science and history. Before joining Discover in 2023, he studied journalism at the Scripps College of Communication at Ohio University and previously interned at Recycling Today magazine.

It’s been more than two decades since scientists finished sequencing the human genome, providing a comprehensive map of human biology that has since accelerated progress in disease research and personalized medicine. Thanks to that endeavor, we know that each of us has about 20,000 protein-coding genes, which serve as blueprints for the diverse protein molecules that give shape to our cells and keep them functioning properly.Yet, we know relatively little about how those proteins are organized within cells and how they interact with each other, says Trey Ideker, a professor of medicine and bioengineering at University of California San Diego. Without that knowledge, he says, trying to study and treat disease is “like trying to understand how to fix your car without the shop manual.” Mapping the Human CellIn a recent paper in the journal Nature, Ideker and his colleagues presented their latest attempt to fill this information gap: a fine-grained map of a human cell, showing the locations of more than 5,000 proteins and how they assemble into larger and larger structures. The researchers also created an interactive version of the map. It goes far beyond the simplified diagrams you may recall from high school biology class. Familiar objects like the nucleus appear at the highest level, but zooming in, you find the nucleoplasm, then the chromatin factors, then the transcription factor IID complex, which is home to five individual proteins better left nameless. This subcellular metropolis is unintelligible to non-specialists, but it offers a look at the extraordinary complexity within us all.Surprising Cell FeaturesEven for specialists, there are some surprises. The team identified 275 protein assemblies, ranging in scale from large charismatic organelles like mitochondria, to smaller features like microtubules and ribosomes, down to the tiny protein complexes that constitute “the basic machinery” of the cell, as Ideker put it. “Across all that,” he says, “about half of it was known, and about half of it, believe it or not, wasn't known.” In other words, 50 percent of the structures they found “just simply don't map to anything in the cell biology textbook.”Multimodal Process for Cell MappingThey achieved this level of detail by taking a “multimodal” approach. First, to figure out which molecules interact with each other, the researchers would line a tube with a particular protein, called the “bait” protein; then they would pour a blended mixture of other proteins through the tube to see what stuck, revealing which ones were neighbors.Next, to get precise coordinates for the location of these proteins, they lit up individual molecules within a cell using glowing antibodies, the cellular defenders produced by the immune system to bind to and neutralize specific substances (often foreign invaders like viruses and bacteria, but in this case homegrown proteins). Once an antibody found its target, the illuminated protein could be visualized under a microscope and placed on the map. Enhancing Cancer ResearchThere are many human cell types, and the one Ideker’s team chose for this study is called the U2OS cell. It’s commonly associated with pediatric bone tumors. Indeed, the researchers identified about 100 mutated proteins that are linked to this childhood cancer, enhancing our understanding of how the disease develops. Better yet, they located the assemblies those proteins belong to. Typically, Ideker says, cancer research is focused on individual mutations, whereas it’s often more useful to think about the larger systems that cancer disrupts. Returning to the car analogy, he notes that a vehicle’s braking system can fail in various ways: You can tamper with the pedal, the calipers, the discs or the brake fluid, and all these mechanisms give the same outcome.Similarly, cancer can cause a biological system to malfunction in various ways, and Ideker argues that comprehensive cell maps provide an effective way to study those diverse mechanisms of disease. “We've only understood the tip of the iceberg in terms of what gets mutated in cancer,” he says. “The problem is that we're not looking at the machines that actually matter, we're looking at the nuts and bolts.”Mapping Cells for the FutureBeyond cancer, the researchers hope their map will serve as a model for scientists attempting to chart other kinds of cells. This map took more than three years to create, but technology and methodological improvements could speed up the process — as they did for genome sequencing throughout the late 20th century — allowing medical treatments to be tailored to a person’s unique protein profile. “We're going to have to turn Moore's law on this,” Ideker says, “to really scale it up and understand differences in cell biology […] between individuals.”This article is not offering medical advice and should be used for informational purposes only.Article SourcesOur writers at Discovermagazine.com use peer-reviewed studies and high-quality sources for our articles, and our editors review for scientific accuracy and editorial standards. Review the sources used below for this article:Cody Cottier is a contributing writer at Discover who loves exploring big questions about the universe and our home planet, the nature of consciousness, the ethical implications of science and more. He holds a bachelor's degree in journalism and media production from Washington State University.

Comparison of a megalodon tooth and a great white shark tooth, not associated with the study. (Image Credit: Mark_Kostich/Shutterstock) NewsletterSign up for our email newsletter for the latest science newsMegalodon teeth have always been key to understanding the ancient marine predator. Fossilized teeth are all that remain to prove the existence of these massive sharks, and the name megalodon is from the Greek for “big tooth.”A new study, published in Earth and Planetary Science Letters, highlights the importance of the megalodon’s human-hand-sized teeth once again. Thanks to extracting and analyzing the traces of zinc left in the fossilized teeth, researchers now know that the megalodon’s diet was much broader than scientists once believed.“Megalodon was by all means flexible enough to feed on marine mammals and large fish, from the top of the food pyramid as well as lower levels – depending on availability,” said Jeremy McCormack from the Department of Geosciences at Goethe University, in a press release.What Did the Megalodon Eat?Clocking in at 78 feet in length and weighing about twice as much as a semi truck, the megalodon was a big fish with a big appetite. It is suggested that a member of the Otodus shark family would require about 100,000 kilocalories per day to survive. Due to this extreme number, scientists have often assumed that the megalodon’s main source of calories came from whales.This new study suggests that whales were not the only item on the megalodon’s daily menu and that these sharks were actually quite adaptable when it came to their food. The research team analyzed 18-million-year-old giant teeth that came from two fossil deposits in Sigmaringen and Passau. What they were looking for was the presence of zinc-66 and zinc-64, two isotopes commonly ingested with food. Typically, the higher up in a food pyramid an animal is, the lower the presence of zinc. As they are oftentimes at the top of the food chain, species such as Otodus megalodon and Otodus chubutensis have a low ratio of zinc-66 to zinc-64 compared to species lower on the food chain.“Sea bream, which fed on mussels, snails, and crustaceans, formed the lowest level of the food chain we studied,” said McCormack in the press release. “Smaller shark species such as requiem sharks and ancestors of today’s cetaceans, dolphins, and whales, were next. Larger sharks, such as sand tiger sharks, were further up the food pyramid, and at the top were giant sharks like Araloselachus cuspidatus and the Otodus sharks, which include megalodon.”Surprisingly, the zinc levels in the megalodon teeth weren’t always that different from the zinc levels in species lower down the food chain. This result means that the commonly held scientific belief that megalodons focused their attention on eating large marine mammals may be incorrect. Instead, McCormack refers to the megalodon as an “ecologically versatile generalist” that adapted to environmental and regional constraints that changed the availability and variety of their prey.A New Method in Teeth TestingUsing the zinc content of fossilized teeth is a relatively new method of analysis, and the research team working on the megalodon couldn’t be happier with their results. The methods used in this study have not only been used for prehistoric shark and whale species but also modern-day shark species, and have even been used on herbivorous prehistoric rhinoceroses.Overall, these new methods have begun to rewrite the history of megalodon’s eating habits and may help to explain more about why these giants of the food chain went extinct. “[Determining zinc isotope ratios] gives us important insights into how the marine communities have changed over geologic time, but more importantly the fact that even ‘supercarnivores’ are not immune to extinction,” said Kenshu Shimada, a paleobiologist at DePaul University and a coauthor of this study, in the press release.Article SourcesOur writers at Discovermagazine.com use peer-reviewed studies and high-quality sources for our articles, and our editors review for scientific accuracy and editorial standards. Review the sources used below for this article:Earth and Planetary Science Letters. Miocene marine vertebrate trophic ecology reveals megatooth sharks as opportunistic supercarnivoresAs the marketing coordinator at Discover Magazine, Stephanie Edwards interacts with readers across Discover's social media channels and writes digital content. Offline, she is a contract lecturer in English & Cultural Studies at Lakehead University, teaching courses on everything from professional communication to Taylor Swift, and received her graduate degrees in the same department from McMaster University. You can find more of her science writing in Lab Manager and her short fiction in anthologies and literary magazine across the horror genre.1 free article leftWant More? Get unlimited access for as low as $1.99/monthSubscribeAlready a subscriber?Register or Log In1 free articleSubscribeWant more?Keep reading for as low as $1.99!SubscribeAlready a subscriber?Register or Log In

The anti-aging supplement industry is valued at many billions of dollars, with North America offering the largest market worldwide. Through clever marketing, many such supplements have promised consumers everything from halting to reversing the aging process — often without clear scientific evidence to back it up.However, recent findings from a long-term randomized controlled study have put a widely used and potent supplement into the anti-aging spotlight: Vitamin D.A sub-study from the Vitamin D and Omega-3 Trial (or VITAL Trial), published in The American Journal of Clinical Nutrition and led by researchers at Mass General Brigham and the Medical College of Georgia, has revealed that long-term Vitamin D supplementation may actually slow aging on a cellular level. This adds even more promise to Vitamin D’s already impressive list of health benefits.There's More to Vitamin D Roughly a quarter of Americans take Vitamin D supplements daily — and for good reason. While this fat-soluble vitamin is best known for maintaining bone health by helping regulate calcium and phosphorus, its role in the body extends far beyond that. Vitamin D also supports immune function, regulates inflammation, and influences cell growth to name a few.That said, getting enough Vitamin D naturally can be challenging. It’s found mainly in fatty animal products like fish, red meat, and eggs. Our skin can also synthesize it through sun exposure — which isn’t always a reliable source due to lifestyle, geography, or sunscreen use. This is why many people end up deficient.With the latest findings from the VITAL Trial, the benefits of adequate Vitamin D supplementation may now include not just stronger bones and better immunity but also support for healthy aging.Read More: What's the Difference Between Vitamin D2 and D3?Vitamin D Prevented Aging on Cellular Level“VITAL is the first large-scale and long-term randomized trial to show that vitamin D supplements protect telomeres and preserve telomere length,” said JoAnn Manson, principal investigator of VITAL and chief of the Division of Preventive Medicine at Brigham and Women’s Hospital in a press statement.Telomeres — repetitive DNA sequences at the ends of chromosomes — protect genetic material during cell division. As we age, telomeres naturally shorten, a process linked to increased risk of age-related diseases and general cellular aging.While earlier small-scale studies offered mixed results, the VITAL Telomere sub-study stands out due to its size and rigor. It followed 1,054 participants aged 50 and older over four years, comparing those who took 2,000 IU of Vitamin D3 daily (a high dosage usually recommended for those with deficiency) with those who took a placebo. Telomere length was measured at the start, at two years, and at four years.The results? Vitamin D3 supplementation significantly slowed telomere shortening — effectively preserving the equivalent of close to three years of cellular aging compared to the placebo group.Why Aging Research Matters“Our findings suggest that targeted vitamin D supplementation may be a promising strategy to counter a biological aging process, although further research is warranted,” said study’s first author Haidong Zhu, a molecular geneticist at the Medical College of Georgia in the news release.Aging research often gets lumped in with science fiction-like efforts to stop aging or live forever, but its real goal is far more grounded: to improve health across the lifespan. Instead of chasing immortality, scientists aim to extend the health span — the number of years people live free of chronic disease and disability.By uncovering interventions like Vitamin D that can support healthier aging, researchers hope to help more people enjoy a higher quality of life well into their later years, without resorting to expensive or unproven treatments.This article is not offering medical advice and should be used for informational purposes only.Article SourcesOur writers at Discovermagazine.com use peer-reviewed studies and high-quality sources for our articles, and our editors review for scientific accuracy and editorial standards. Review the sources used below for this article:Cleveland Clinic: Vitamin D DeficiencyNational Institutes of Health, Office of Dietary Supplements: Vitamin D Fact Sheet for Health ProfessionalsHaving worked as a biomedical research assistant in labs across three countries, Jenny excels at translating complex scientific concepts – ranging from medical breakthroughs and pharmacological discoveries to the latest in nutrition – into engaging, accessible content. Her interests extend to topics such as human evolution, psychology, and quirky animal stories. When she’s not immersed in a popular science book, you’ll find her catching waves or cruising around Vancouver Island on her longboard.

The idea of using the body’s own organs as mini bioreactors to grow replacement tissue or even regenerate other organs might sound like something out of a science fiction movie, but it's already becoming reality in cutting-edge labs around the world.A collaboration between Wenzhou Medical University, Nanjing University, and the University of Macau has taken an unexpected turn in regenerative medicine by turning to the spleen, a lymphatic organ typically overshadowed by its more high-profile neighbors. Their findings, recently published in Science Translational Medicine, suggest that the spleen could be key to growing new, functional tissues within the body. And the implications are huge, particularly for diseases like type 1 diabetes.Reinventing the Spleen's PurposeRoughly the size of an avocado and tucked under the left side of the rib cage just above the stomach, the spleen’s usual responsibilities include filtering damaged blood cells and supporting the immune system. It’s often considered non-essential as many people live healthy lives without their spleen, if it was removed after injury or illness.But its seemingly simple structure might be exactly what makes it so powerful. With its sponge-like texture, nutrient-rich environment, and proximity to major blood vessels like those of the liver, the spleen turns out to be an ideal candidate for tissue cultivation.Insulin, Made in the SpleenIn this study, researchers set their sights on type 1 diabetes, a condition in which the immune system destroys insulin-producing pancreatic islet cells. Working with the spleens of primates (macaques), the team engineered microenvironments within the test organs to support human pancreatic islets.“We’re essentially converting the spleen into a high-performance bioreactor,” explained study co-author Lei Dong in a press release. “By enhancing extracellular matrix support, accelerating blood vessel growth, and suppressing immune attacks, we’ve created an ideal niche for transplanted cells to thrive.”After transplantation, the human islet cells matured inside the primates’ spleens and began producing insulin and C-peptide (a byproduct of insulin production) continuously for 28 days. It’s a critical proof of concept — showing that not only can the spleen host new tissue, but it can support it long enough to function effectively.This isn't the team’s first foray into reimagining the spleen’s capabilities. They already reprogrammed mouse spleens to perform liver functions, used gene editing to grow liver tissue without transplanting any cells, and even rebuilt thyroid tissue in animal models.Now, the next frontier is personal: using patient-specific induced pluripotent stem cells (iPSCs) to grow customized organs. “The spleen acts like a living bioreactor embedded in our bodies,” said Dong. “With minimally invasive B-ultrasound-guided delivery, we could one day cultivate custom-made organs on demand.”While the concept is promising, clinical use is still a few years away. However, after undergoing thorough safety testing, this work forces a re-evaluation of regenerative medicine and what we consider “non-essential.” The spleen, long overshadowed and often dismissed, might just be one of the body’s most underutilized resources — an internal bioreactor whose potential is only just starting to be realized.This article is not offering medical advice and should be used for informational purposes only.Article SourcesOur writers at Discovermagazine.com use peer-reviewed studies and high-quality sources for our articles, and our editors review for scientific accuracy and editorial standards. Review the sources used below for this article:Science Advances: Transforming the spleen into a liver-like organ in vivoScience Translational Medicine: Islet transplantation in immunomodulatory nanoparticle–remodeled spleensHaving worked as a biomedical research assistant in labs across three countries, Jenny excels at translating complex scientific concepts – ranging from medical breakthroughs and pharmacological discoveries to the latest in nutrition – into engaging, accessible content. Her interests extend to topics such as human evolution, psychology, and quirky animal stories. When she’s not immersed in a popular science book, you’ll find her catching waves or cruising around Vancouver Island on her longboard.

So many unexplored secrets still lie at the outskirts of our solar system, where a potential candidate for a new dwarf planet lies. Although space beyond Neptune was thought to be mostly devoid of large objects, researchers are beginning to rethink this assumption after coming across an extraordinary trans-Neptunian object, called 2017 OF201. According to a recently published arXiv pre-print, 2017 OF201 could soon join the ranks of Pluto and other dwarf planets in the solar system. The behavior of its extremely large orbit has piqued the interest of astronomers, who now believe there may be plenty more objects just like it drifting through this remote part of space. Where are Dwarf Planets Located?Composite image showing the five dwarf planets recognized by the International Astronomical Union, plus the newly discovered trans-Neptunian object 2017 OF201. (Image Courtesy of: NASA/JPL Caltech; Sihao Cheng et al.)The Kuiper Belt, a region of the solar system past Neptune’s orbit, is likely home to hundreds of thousands — if not millions — of icy objects that vary in shape and size. Over 2,000 trans-Neptunian objects (TNO) have been observed here, but scientists believe that this figure doesn’t even scratch the surface of this area’s extraterrestrial riches. The most famous resident of the Kuiper Belt, without a doubt, is Pluto. Other dwarf planets have also been found in the area, such as Eris, Haumea, and Makemake. But why do Pluto and its fellow dwarf planets not enjoy the same status as the solar system’s eight regular planets? To officially be considered a planet, an object must follow three rules set by the International Astronomical Union in 2006: It must orbit a host star (like the Sun), be mostly round, and be large enough to clear away objects of a similar size near its orbit (in other words, it has to be “gravitationally dominant”). Dwarf planets like Pluto follow the first two rules, but they cannot “clear the neighborhood” near their orbits. The Extreme Orbit of 2017 OF201Scientists have been eager to uncover more TNOs in the Kuiper Belt, which is what led to the discovery of 2017 OF201. The object was identified based on bright spots in an astronomical image database from the Victor M. Blanco Telescope and Canada-France-Hawaii Telescope. Assessing exposures over seven years, the researchers were led to 2017 OF201, which is one of the most distant visible objects in our solar system at this point. The most significant aspect of 2017 OF201 appears to be its extreme orbit. “The object’s aphelion — the farthest point on the orbit from the Sun — is more than 1600 times that of the Earth’s orbit,” said author Sihao Cheng of the Institute for Advanced Study in Princeton, NJ, in a press statement. “Meanwhile, its perihelion — the closest point on its orbit to the Sun — is 44.5 times that of the Earth’s orbit, similar to Pluto's orbit.”The researchers estimate the object’s diameter to be 700 km [about 435 miles], “which would make it the second largest known object in a wide orbit," according to the statement. Pluto’s diameter, for reference, is 2,377 km [about 1477 miles]. Mysteries of the Kuiper BeltThe object’s orbit, which takes around 25,000 years to complete, may be the result of an encounter with a larger planet that sent it far into space. The object also doesn’t show signs of clustering in a specific orientation, something commonly observed with other TNOs. Clustering has often been referenced as indirect evidence for the existence of a hypothetical ninth planet in the outer solar system (called Planet Nine or Planet X). But since 2017 OF201 doesn’t follow the same pattern as other TNOs, it may stand against this hypothesis. The researchers hope to gather more details on 2017 OF201 in future observations. The excitement doesn't stop at this object, since its discovery hints at an abundance of similar objects in the Kuiper Belt, still waiting to be observed.“2017 OF201 spends only 1 percent of its orbital time close enough to us to be detectable. The presence of this single object suggests that there could be another hundred or so other objects with similar orbit and size; they are just too far away to be detectable now,” said Cheng in a press release. “Even though advances in telescopes have enabled us to explore distant parts of the universe, there is still a great deal to discover about our own solar system.”Article SourcesOur writers at Discovermagazine.com use peer-reviewed studies and high-quality sources for our articles, and our editors review for scientific accuracy and editorial standards. Review the sources used below for this article:Earth and Planetary Astrophysics. Discovery of a dwarf planet candidate in an extremely wide orbit: 2017 OF201NASA. Kuiper Belt FactsNASA. Dwarf PlanetsJack Knudson is an assistant editor at Discover with a strong interest in environmental science and history. Before joining Discover in 2023, he studied journalism at the Scripps College of Communication at Ohio University and previously interned at Recycling Today magazine.

Worms are decomposers. Many survive by breaking down dead things — dead bacteria, dead plants, dead animals, dead anything. So, they must be accustomed to the stench of death. Not so, a new study suggests — not when the dead organism is another worm.Published in Current Biology, the study states that C. elegans roundworms react adversely to the smell of a deceased counterpart. Not only does this smell invoke a behavioral response of corpse avoidance, but it also invokes a physiological response of increased short-term fertility and decreased long-term fitness and lifespan.“Caenorhabditis elegans prefers to avoid dead conspecifics,” or deceased members of the same species, the authors state in the study, with the worms reacting to death with a range of “aversion” and “survival” responses. Taken together, the results reveal a new signaling mechanism that’s available to worms and possibly other organisms, too, as a means of detecting and responding to death.Read More: These Fruit Flies Aged Faster After Seeing DeathWorms Signal and Detect DeathC. elegans roundworms aren’t the only small organisms that respond to the dead. Ants and bees dispose of the deceased from their colonies, for instance, while fruit flies avoid corpses (and shun flies that have seen corpses themselves). Death-exposed fruit flies even experience faster aging after seeing a deceased counterpart, and have shorter lifespans than those that have had no encounters with death. That these animals respond so strongly to the dead is widely documented. So, when the authors of the new study noticed C. elegans worms wriggle away from corpses, they saw the response as a chance to dig deeper into death signaling and detection. Indeed, while many species’ reactions to death are mediated mainly by sight, that certainly wasn’t the case for wiggling roundworms, which have no eyes and no sense of vision. “We felt this was quite a unique opportunity to start diving into what is happening mechanistically that enables C. elegans to detect a dead conscript,” said Matthias Truttmann, a senior study author and a physiologist at the University of Michigan, according to a press release.To determine how C. elegans worms detect the dead, Truttman and his team exposed the worms to conspecific corpses and to fluids taken from the deteriorating cells of those corpses. The worms responded to both with avoidance, moving away regardless of their age and sex, suggesting that the corpses and fluids carried similar signatures of death. These death cues also resulted in short-term increases in fertility, long-term decreases in fitness (represented by a reduced thrashing rate), and long-term decreases in lifespan. But what were those death cues, exactly, and how did the worms pick up on them?Sounding a Sensory AlarmTo figure out what those cues could be, the study authors recorded the activity in the worms’ sensory neurons as they encountered the corpses and fluids. The recordings revealed that AWB and ASH, two neurons that are responsible for making sense of olfactory stimuli, were activated when the corpses and fluids were present, indicating that the worms were smelling the signature of death.“The neurons we identified are well known to be involved in behavioral responses to a variety of environmental cues,” Truttmann said in the release. According to the study authors, the metabolites AMP and histidine were probably responsible for the signal of death that the C. elegans worms recognized. Though these metabolites are typically contained in living cells, they are released when living cells die and deteriorate — in this case, triggering the behavioral and physiological responses in C. elegans. “They also detect a couple of intracellular metabolites that are not typically found in the environment. If they are around, it indicates that a cell has died, popped open, and that something has gone wrong,” Truttmann said in the release.It is possible that cellular metabolites serve as a signal of death in other organisms, too, Truttmann said, as the release of metabolites from dying and disintegrating cells in one tissue can cause changes in other tissues in humans, for instance. Whether this signal sounds the alarm in other organisms is still uncertain. While further research is required to understand the role of cellular metabolites in detecting death across species, for now, it’s clear that death is a sensitive subject, even for worms like C. elegans.Article SourcesOur writers at Discovermagazine.com use peer-reviewed studies and high-quality sources for our articles, and our editors review for scientific accuracy and editorial standards. Review the sources used below for this article:Current Biology. Sam Walters is a journalist covering archaeology, paleontology, ecology, and evolution for Discover, along with an assortment of other topics. Before joining the Discover team as an assistant editor in 2022, Sam studied journalism at Northwestern University in Evanston, Illinois.

A cataclysmic asteroid collision may not sound like the starting place for life. But 66 million years ago, the Chicxulub impactor that wiped out the dinosaurs and much of the Cretaceous period’s fauna also kick-started a hydrothermal system that became a hotbed for life to recover in the local area. That’s the finding from a recent paper published in Nature Communications. Chicxulub Impact and Rapid RecoveryThe impact itself was truly a catastrophe, says Philippe Claeys, Chair of the Large Research Group AMGC at Vrije Universiteit Brussel and a co-author on the paper. When the asteroid – estimated at 10 to 15 kilometers [about 6 miles to 9 miles] in diameter – slammed into the earth it sent vast amounts of energy into the atmosphere, resulting in a massive cloud plume that lead to the collapse of photosynthesis, large-scale cooling, and the demise of up to 70 percent of life on earth, including the dinosaurs.  That extended to the oceans. “At least for 500,000 years, there's good evidence to show that the world's oceans were not functioning exactly as modern or Cretaceous oceans were,” Claeys says.Past research found that within decades, the waters around the site recovered quickly. This recent paper suggests that it is because the massive impact and the resultant melt sheet created a hydrothermal system that funneled hot water and nutrients to the surrounding area, enabling this surprisingly quick comeback.“What is interesting in this new paper is that we teamed up with geochemists, crater specialists, and micropalaeontologists to look at the effect on the biosphere, on the micro plankton within the region surrounding the crater in the Gulf of Mexico,” Claeys says. “The conclusion, that was a little bit surprising, is that the recovery of life seems to be accelerated compared to the rest of the oceans.”Read More: Two Asteroids May Have Wiped Out The DinosaursHydrothermal System Funneled Nutrients That multi-disciplinary team traced levels of osmium – an element found in asteroids like the Chicxulub impactor – in sediments taken from core samples in the crater. Sean Gulick, a research professor at The University of Texas at Austin’s Jackson School of Geosciences, and a co-author on the study, was part of a 2016 drill team that took core samples from the crater. These samples were vital to these recent findings.He explains that in this instance, osmium acts as a “tracer for all sorts of nutrients that might be enriching the oceans above.” That showed that the hydrothermal system following the collision was likely funneling nutrients to the ocean above for at least 700,000 years.“We do know that an asteroid impact with all of this energy, if it's large enough, can cause a mass extinction event globally, because of all the atmospheric effects,” Gulick says. “But it also turns out to be beneficial to life, at least locally.”Even though the Chicxulub impact resulted in a “kiss of death for dinosaurs,” it also acted as a “cradle for life,” Gulick says. Possibility of Life on Other Planets Their research also showed that during the time the hydrothermal system functioned, the type of marine life mainly comprised of plankton species adapted to high-nutrient environments. This shifted to species that thrive in low-nutrient environments over time.In Gulick’s view, their findings open up the possibility of a mechanism to kick-start life on other planets. “Everything out there gets smacked with objects flying around. From the original creation of the planets and from collisions in the asteroid belt and everything else,” Gulick says. “Every one of those planets has a way to have their surface changed by impact cratering that then reorganizes things, brings things to the surface, and adds heat.”  As long as there are fluids or ice that could result in a hydrothermal system, Gulick adds. “So, if this is a viable mechanism to get life going, then that means it's entirely possible to have life on a lot of different planets.”Read More: Did a Dust Plume Kill the Dinosaurs?Article SourcesOur writers at Discovermagazine.com use peer-reviewed studies and high-quality sources for our articles, and our editors review for scientific accuracy and editorial standards. Review the sources used below for this articleUniversity of Texas Institute of Geophysics. Life Recovered Rapidly at Site of Dino-Killing Asteroid. A Hydrothermal System May Have Helped.University of Texas Geosciences. Drilling into Dino Doomsday Sean Mowbray is a freelance writer based in Scotland. He covers the environment, archaeology, and general science topics. His work has also appeared in outlets such as Mongabay, New Scientist, Hakai Magazine, Ancient History Magazine, and others.

Sloths once came in a variety of sizes and lived in multiple settings in many parts of the world. A study in the journal Science examined sloth evolution over the past 35 million years, investigated multiple factors driving their growth and expansion throughout the world, and concluded that human hunting starting around 15,000 years ago drove their dramatic decline.Today, only six species within two genera remain. All are relatively small (especially compared to their largest ancestors) tree-dwellers that primarily live in the tropical rainforests of South and Central America.“These species are a tiny remnant of a once diverse American clade that was mostly made up of large-bodied species,” according to an editorial summary that accompanied the paper. Ancient Sloths Were Once WidespreadThat’s a huge contrast to sloth life during the late Cenozoic. During that period, more than 100 genera of sloths lived in a wide range of habitats and a variety of sizes, topping out at nearly 20 feet tall and weighing several tons.To investigate this diversity — and to track where, when, and why it collapsed — a team of scientists examined fossil measurements, DNA and protein sequences, and advanced evolutionary modeling. In doing so, they reconstructed sloth evolutionary history across 67 genera. They then investigated whether evolutionary changes in size were linked to habitat, diet, climate, predation, or other ecological pressures.Habitat Drove Sloth SizeThe findings show that habitat appeared to be a major driver in shaping their body size evolution. The earliest sloths were large and grazed on the ground. Some species adapted to tree dwelling and developed smaller body sizes. However shifts in both sloth size and dwelling didn’t happen in a straight line. The species size grew or shrunk as the climate warmed and cooled, and as ecosystems shifted from grasslands to woodlands.The species thrived for tens of millions of years, exhibiting the most variety in body sizes in the Pleistocene, which began about 2.6 million years ago.Ancient Humans Caused Dramatic DeclineThen, starting about 15,000 years ago, the creature experienced “a sudden and dramatic decline,” according to a press release.The researchers report that decline doesn’t mesh with any major known climate events. "Size disparity increased during the late Cenozoic climatic cooling, but paleoclimatic changes do not explain the rapid extinction of ground sloths that started approximately 15,000 years ago,” according to the paper. However, it does coincide with the expansion of humans into the Americas. The likely conclusion is that human hunting drove the extinction of the larger, ground-based sloths, while the smaller ones related to today’s creatures escaped by taking to the trees.Article SourcesOur writers at Discovermagazine.com use peer-reviewed studies and high-quality sources for our articles, and our editors review for scientific accuracy and editorial standards. Review the sources used below for this article:Before joining Discover Magazine, Paul Smaglik spent over 20 years as a science journalist, specializing in U.S. life science policy and global scientific career issues. He began his career in newspapers, but switched to scientific magazines. His work has appeared in publications including Science News, Science, Nature, and Scientific American.

While we might not realize it, when it comes to deciding which people we trust more, we tend to lean towards people who grew up poor, according to a new study, published in the Journal of Personality and Social Psychology by the American Psychological Association (APA). We seem to trust those who grew up in middle to lower income households versus wealthy households. "Trust is essential for healthy relationships. Without it, romantic partnerships can fail, workplaces can suffer, and social divisions can grow,” said lead researcher Kristin Laurin, Ph.D., a psychology professor at the University of British Columbia, in a press release. “But what makes people trust someone in the first place?"Studying Trust in StrangersFor this study, the research team presented the 1,900 study participants with a series of experiments that looked at how someone’s social class, past or present, impacted how trustworthy they were to strangers. One of the experiments had the participants, known as “trusters,” play a game with other people they believed to be real, when in actuality they were playing against a fictional profile. Each truster was placed into a “group” and asked to fill out a personal profile. They then received a profile from the other members of their group, though these were all fake. According to the study, some of these fake profiles (known as trustees) mentioned attending public school or working part-time, indicating that this person grew up with fewer means. Other profiles indicated that the person went to private school and often vacationed in Europe for the summer. This indicates that this person grew up in a more privileged situation. Trustworthy or Not TrustworthyIn this particular experiment, the participants were given 10 raffle tickets that could be used in a drawing for two $100 gift cards. If a truster transferred any number of their tickets to a trustee, those transferred tickets would triple. From here, the trustee could then return a number of the tickets to the truster. The number of tickets the truster transferred indicated how trustworthy they believed the trustee to be.   Part of the experiment also looked at the expectations around trust. The experiment asked, “If you gave all 10 tickets to this person, they would have 30. How many do you think they would give back?”Another experiment in the study revealed each of the fake players' socioeconomic backgrounds. The research team then asked the participants to rate the fake players based on morality.  The results indicated that participants tended to think those with past or current low socioeconomic backgrounds were more trustworthy, but actually believed someone was more trustworthy if they grew up in a low socioeconomic situation. “Our research shows that people draw a clear line between someone's childhood and their current situation,” Laurin said in a press release. “They generally saw people who grew up in lower-class homes as more moral and trustworthy. While they sometimes acted as if they trusted people who are currently lower class, they didn’t always believe those people would honor that trust.”Trust in the Long Run With these results, the research team thinks that people might want to approach situations where trust is important with a bit more strategy. “If you’ve always been wealthy, for example, you might want to downplay that history and focus on the now, whereas if you’ve always struggled financially, making it clear that you grew up with humble roots might be more to your advantage,” Laurin said in a press release.Another thing that Laurin noted is that even though the study participants tended to trust the lower-income individuals, the study did not indicate if lower-income people were actually more trustworthy than wealthy people. “We didn’t examine whether a person’s childhood or current class background actually influences their behavior,” she said in a press release. “That’s a question for future studies — especially to understand when trust is misplaced or when people miss chances to trust others fairly.”Article SourcesOur writers at Discovermagazine.com use peer-reviewed studies and high-quality sources for our articles, and our editors review for scientific accuracy and editorial standards. Review the sources used below for this article:Journal of Personality and Social Psychology. Trust and Trust Funds: How Others’ Childhood and Current Social Class Context Influence Trust Behavior and ExpectationsA graduate of UW-Whitewater, Monica Cull wrote for several organizations, including one that focused on bees and the natural world, before coming to Discover Magazine. Her current work also appears on her travel blog and Common State Magazine. Her love of science came from watching PBS shows as a kid with her mom and spending too much time binging Doctor Who.

Although volcanic eruptions are mostly known for their devastating impacts on land, they also influence the atmosphere in surprising ways. Particles that are catapulted into the sky by eruptions can alter the composition of clouds, cooling the surface below. Volcanic ash, as new research suggests, plays an unexpected role in cloud formation by manipulating ice crystals.A new study published in Science Advances found that volcanic ash enables ice to take shape in clouds, a process that hasn’t been studied extensively before. The environmental effects — how volcanic ash contributes to radiation on Earth — are still up for debate, but a better understanding of cloud formation could inform geoengineering efforts that aspire to slow global warming. How Clouds and Volcanoes Impact Radiation Clouds have a complex relationship with radiation. This is seen with their influence on Earth’s radiation budget, the balance between incoming shortwave radiation from the Sun and outgoing longwave radiation from Earth. Depending on the thickness and elevation of a cloud, it can either have an absorbing or reflecting effect. Lower, thicker clouds reflect more radiation coming from the Sun and cool the Earth’s surface. Higher, thinner clouds reflect less incoming solar radiation and even tend to absorb outgoing infrared radiation constantly emitted by Earth itself. Cirrus clouds — wispy, icy clouds that sit high in the atmosphere — generally have a net warming effect on Earth. Volcanoes also affect Earth’s radiation budget through the particles they eject. Scientists have mostly focused on sulfate aerosols, which form after sulfur dioxide is released into the atmosphere by an eruption. Although sulfate aerosols can deplete the ozone layer and produce acid rain, they also help cool Earth by reflecting solar radiation. The Impact of Volcanic Ash Volcanic ash hasn’t garnered as much attention as sulfate aerosols, but the new study proves that it also needs to be considered in climate discussions. In the study, researchers from the Lawrence Livermore National Laboratory (LLNL) gathered information on ice crystals in clouds by examining radar and lidar data from NASA’s Cloudsat and CALIPSO missions. The team found that ash-rich volcanic eruptions caused clouds to host fewer, but larger ice crystals. “At the beginning of the study, we did expect clouds affected by volcanic eruptions to look different from natural clouds, but not in the way we ultimately found,” said Lin Lin, a scientist at LLNL, in a statement. “We anticipated that volcanic aerosols would lead to an increase in the number of ice crystals in clouds. But to our surprise, the data showed the opposite.”Dealing with Cirrus CloudsThe team initially thought that an eruption would cause homogenous nucleation, in which ice forms spontaneously without the need for a surface. They instead found that ash-heavy eruptions prompt an opposite reaction called heterogenous nucleation, in which ice needs an “impurity” like volcanic ash to form. After an eruption, water droplets stick to ash particles before they can get cold enough to freeze. By producing fewer and larger ice crystals, clouds that undergo heterogenous nucleation end up reflecting less solar radiation, but they also allow more radiation from Earth to escape into space. The team also determined that ash-rich eruptions led to a higher frequency of cirrus clouds. The researchers say volcanic ash needs to be implemented in more climate models to understand exactly how all of these factors influence Earth’s surface temperature. Further studies on volcanic ash could also guide plans for cirrus cloud thinning, a proposed idea for mitigating global warming. This process would involve spraying aerosols into the atmosphere to thin or eliminate cirrus clouds, allowing more longwave radiation to leave Earth. Article SourcesOur writers at Discovermagazine.com use peer-reviewed studies and high-quality sources for our articles, and our editors review for scientific accuracy and editorial standards. Review the sources used below for this article:Science Advances. Ice nucleation by volcanic ash greatly alters cirrus cloud propertiesJack Knudson is an assistant editor at Discover with a strong interest in environmental science and history. Before joining Discover in 2023, he studied journalism at the Scripps College of Communication at Ohio University and previously interned at Recycling Today magazine.

Targeting the immune system to fight cancer has been in the works for over a decade, and thanks to its precise, personalized approach, it's poised to shape the future of oncology. As our understanding of how immunotherapy can be used against cancer grows, scientists are now reconsidering existing drugs, particularly those that affect the immune system, for their potential role in cancer treatment.Alongside well-established medications like aspirin, showing potential to help the immune system combat cancer, researchers are now turning their attention to antidepressants — and the results are looking promising.A team from UCLA recently published a study in Cell showing how SSRIs, a widely prescribed class of antidepressants, can help the immune system suppress tumor growth across various cancer types. So instead of developing entirely new drugs, could the key lie in repurposing ones we already have?“These drugs have been widely and safely used to treat depression for decades, so repurposing them for cancer would be a lot easier than developing an entirely new therapy,” said senior study author Lili Yang, a member of the Eli and Edythe Broad Center of Regenerative Medicine and Stem Cell Research at UCLA, in a press statement.The Role of AntidepressantsSSRIs, or selective serotonin reuptake inhibitors, work by increasing levels of serotonin, a neurotransmitter associated with mood and focus, and by blocking the serotonin transporter (SERT), which typically regulates how much serotonin is available outside our cells. In people with depression, serotonin levels in the brain drop significantly — a problem that SSRIs like fluoxetine (Prozac), citalopram (Celexa), and sertraline (Zoloft) help to address.But serotonin isn’t just about mood. Only about 5 percent of the body’s serotonin is made in the brain. The rest acts as a signaling molecule in many essential bodily functions, including digestion — and, as recent research suggests, immune system regulation.While earlier lab studies hinted that serotonin might help stimulate T-cells, the immune system’s front-line soldiers, its precise role and potential in immunoregulation remained unclear. That is, until now.Antidepressants and Anti-Tumor PotentialBefore studying SSRIs, the UCLA team had explored another class of antidepressants called MAO inhibitors (MAOIs), which also increased serotonin levels by blocking an enzyme known as MAO-A. These drugs showed anti-tumor potential, but due to their higher risk of side effects, researchers shifted their focus to SSRIs.“SERT made for an especially attractive target because the drugs that act on it — SSRIs — are widely used with minimal side effects,” said Bo Li, the study’s first author, in the news release. By using SSRIs to boost serotonin availability, researchers aimed to outmaneuver one of cancer’s suggested strategies: depriving immune cells of the serotonin they need to function effectively.The results were encouraging. In both mouse and human tumor models of melanoma, breast, prostate, colon, and bladder cancers, SSRI treatment shrank tumors by over 50 precent. The key, according to Yang, was “increasing their access to serotonin,” which in turn enhanced the T-cells' ability to attack.Combining with Existing Cancer TreatmentsThe team also tested whether combining SSRIs with existing cancer treatments could offer even better results. The answer was yes. In follow-up experiments, all mice with melanoma or colon cancer that received both an SSRI and immune checkpoint blockade (ICB) therapy, a treatment designed to overcome the immune-suppressing nature of tumors, experienced significantly reduced tumor sizes.“Immune checkpoint blockades are effective in fewer than 25 percent of patients,” said study co-author James Elsten-Brown in the press release. “If a safe, widely available drug like an SSRI could make these therapies more effective, it would be hugely impactful.”Using therapies already deemed safe means fewer regulatory hurdles and faster clinical use.“Studies estimate the bench-to-bedside pipeline for new cancer therapies costs an average of $1.5 billion,” Yang said. “When you compare this to the estimated $300 million cost to repurpose FDA-approved drugs, it’s clear why this approach has so much potential.”This article is not offering medical advice and should be used for informational purposes only.Article SourcesOur writers at Discovermagazine.com use peer-reviewed studies and high-quality sources for our articles, and our editors review for scientific accuracy and editorial standards. Review the sources used below for this article:UCLA Broad Stem Cell Research Center: Drug commonly used as antidepressant helps fight cancer in miceHaving worked as a biomedical research assistant in labs across three countries, Jenny excels at translating complex scientific concepts – ranging from medical breakthroughs and pharmacological discoveries to the latest in nutrition – into engaging, accessible content. Her interests extend to topics such as human evolution, psychology, and quirky animal stories. When she’s not immersed in a popular science book, you’ll find her catching waves or cruising around Vancouver Island on her longboard.

Dogs have been man’s best friend for centuries. In recent decades, those furry friends have transitioned into “fur babies,” with many people opting for dog ownership over traditional parenthood. But what does choosing dogs over children say about our society and the way we think about family?In a study published in European Psychologist, a research team from Eötvös Loránd University suggests that declining global birth rates and increasing dog ownership are related. Although dogs cannot replace children, they can effectively offer people the chance to fulfill the parenting urge without the financial and social demands associated with human offspring.“Among many factors, the relatively short lifespan of dogs might contribute to it, as most people expect to outlive their dog, but not their child,” said Laura Gillet, Ph.D. student at the Department of Ethology, in a press release. “Not only individual decisions, but also sociocultural context are crucial to understanding how and why people develop certain types of relationships with their animals.”Why People Choose Dogs Over ChildrenGlobally, especially in wealthy and developed countries, birth rates have steadily declined. In these same countries, dog ownership has only continued to skyrocket, with more people opting to have a pet instead of having a child.To investigate this phenomenon, researchers completed a comprehensive literature review and came up with a hypothesis: for many people, dogs exist as the perfect compromise. We all have a genetically-embedded drive to nurture, and our social bonds with dogs can satisfy this drive. Furry children allow their owners to achieve emotional outcomes similar to those of traditional parents, including positive emotions, social support, and a sense of purpose. By fulfilling this need for dependence and costing less time and money than human children, parenting dogs is a win-win situation.What Makes Dogs Good Kids?Dogs’ cognitive abilities that allow them to learn and respond to human communication are partly why they’ve been by our side for so long. These special adaptations also aid in developing their social behaviors, many of which are incredibly similar to pre-verbal children. Breeds that are particularly baby-like, such as pugs and French bulldogs, can even exhibit the innocence and helplessness of toddlers.Like children, dogs are also dependent on humans as their caregivers. Domesticated dogs can’t feed themselves, take themselves for walks, or arrange social interactions. Their parents are fully responsible for providing them with the necessary means for survival. Although the expectations are high and dogs become incredibly attached to the humans who take care of them, the commitment is still less than expected for a human child. Even with all these comparisons between fur and biological children, treating dogs this way isn’t universal for all dog owners.“We would like to point out that, contrary to popular belief, only a small minority of dog owners actually treat their pets like human children. In most cases, dog parents choose dogs precisely because they are not like children, and they acknowledge their species-specific needs,” said Eniko Kubinyi, senior author of the study and head of the MTA-ELTE “Momentum” Companion Animals Research Group, in the press release.The Future of Pet ParentingFor the research team, it is important that people remember that dogs don’t always want and need what humans think is best for them. Unfortunately, seeing a dog like a human child often raises ethical concerns. The growing interest in infant-like traits has led to the mass breeding of unhealthy breeds. Additionally, being overprotective and sheltering dogs can result in emotional and behavioral problems.Overall, the study’s authors hope that their findings will result in a broader way of thinking about the bond between people and their pets. Due to increasing social isolation and loneliness in our modern world, dogs are still our best friends, companions, and partners, no matter what shape that relationship takes.Article SourcesOur writers at Discovermagazine.com use peer-reviewed studies and high-quality sources for our articles, and our editors review for scientific accuracy and editorial standards. Review the sources used below for this article: European Psychologist. How modern dog ownership has redefined family and parenting As the marketing coordinator at Discover Magazine, Stephanie Edwards interacts with readers across Discover's social media channels and writes digital content. Offline, she is a contract lecturer in English & Cultural Studies at Lakehead University, teaching courses on everything from professional communication to Taylor Swift, and received her graduate degrees in the same department from McMaster University. You can find more of her science writing in Lab Manager and her short fiction in anthologies and literary magazine across the horror genre.

In May 2023, Chinese astronauts swabbed several surfaces of their space station Tiangong (Mandarin for "Heavenly Place"), then sent the samples back to Earth for analysis. The results are now in: the sample contained one bacterium never before seen, according to a report in the International Journal of Systemic and Evolutionary Microbiology.New Bacteria in Space Station The samples were taken, according to the paper, to help keep astronauts healthy in subsequent missions. “Understanding the characteristics of microbes during long-term space missions is essential for safeguarding the health of astronauts and maintaining the functionality of spacecraft,” according to the paper.There are multiple plausible explanations for both the bacteria’s presence and novelty. It could have hitch-hiked with the astronauts and remained more or less the same (although thousands have been identified, there are potentially billions of unknown bacterium on our planet). It could have taken that same route, but mutated and evolved. Or it could be a strain only found in space.Bacteria Similarities and AbilitiesTo get a better picture of the possibilities, it might be best to parse the knowns from the unknowns. First, and perhaps most importantly, it is not completely novel. The bacteria shares enough genetic similarities (two significant stretches of DNA match or are conserved) with Niallia circulans for it to be considered the same genus. Therefore, the authors named it Niallia tiangongensis.Its general appearance also doesn’t appear to be completely out of this world. The paper described it as an “[…] aerobic, spore-forming, rod-shaped strain.”It does appear to have some interesting abilities, though. According to the paper, it shows “a unique ability to hydrolyse gelatin.” This means it can break down some compounds and add components of water to them, perhaps as a way to feed themselves in an environment with little available food.Adaptations to SpaceDifferences in two proteins that resemble those in its cousin hint that it has evolved enhanced abilities to protect itself from some conditions specific to space. Those include tools to create a biofilm it could perhaps hide beneath, and the means to repair damage from radiation, among other abilities.Its terrestrial cousin has one concerning ability. It can cause infection — even sepsis. Knowing whether N. tiangongensis can do the same, and if so, at what level, will likely be the subject of further investigation, since such understanding is a key part of the China Space Station Habitation Area Microbiome Program (CHAMP) that led to its collection, return, and analysis.Article SourcesOur writers at Discovermagazine.com use peer-reviewed studies and high-quality sources for our articles, and our editors review for scientific accuracy and editorial standards. Review the sources used below for this article:International Journal of Systemic and Evolutionary Microbiology. Niallia tiangongensis sp. nov., isolated from the China Space Station Before joining Discover Magazine, Paul Smaglik spent over 20 years as a science journalist, specializing in U.S. life science policy and global scientific career issues. He began his career in newspapers, but switched to scientific magazines. His work has appeared in publications including Science News, Science, Nature, and Scientific American.

A human can’t shrink away from the threats of climate change. A clownfish, however, can. In a new paper published today in Science Advances, a team of researchers revealed that these tiny “Finding Nemo” fish can actually shrink to survive heat stress, allowing them to overcome the threat of heatwaves.“We were so surprised to see shrinking in these fish,” said Melissa Versteeg, a study author and a Ph.D. student at Newcastle University in the U.K., according to a press release. “In the end, we discovered it was very common in this population.”Clownfish Shrink in SizeA clown anemonefish. (Image Credit: Morgan Bennett-Smith)Climate change has transformed terrestrial and marine habitats and continues to transform them, with heatwaves — or periods of abnormal warmth — having one of the most significant impacts on animals. Studies show, for example, that increasing temperatures have a strong influence on the dimensions of terrestrial and marine species, shaping their size and size variability and contributing to their overall reduction in size over time.But what, exactly, is the effect of marine heatwaves on the clownfish, also known as the clown anemonefish (Amphiprion percula)?Setting out to study how heatwaves transform these fish over time, Versteeg and a team of researchers turned to the wild clownfish population in Kimbe Bay in Papua New Guinea, where heatwaves caused temperatures to sit around 4 degrees Celcius above average over the course of the study. Measuring the water temperatures and the size of the clownfish there from February 2023 to August 2023, the team found that individual clownfish shrank over time.“We measured each fish individual repeatedly over a period of five months,” Versteeg said in the release. “During our study, 100 fish shrank out of the 134 fish that we studied.” Rather than getting slimmer, these clownfish shrank by getting shorter, with the degree of their reduction depending on the individual’s initial size and social rank. According to the researchers, the results reveal that clownfish reduce their size in response to heat stress, which, in turn, increases their chances of surviving a heatwave by 78 percent.Read More: How Volunteers Are Helping Keep Coral Reefs AliveClownfish Survival ImprovesAccording to the researchers, some clownfish shrank one time, and some clownfish shrank multiple times, with all of the fish that shrank multiple times surviving throughout the course of the study. Intriguingly, the chances of clownfish survival were also improved if a clownfish shrank alongside its breeding partner. “We witnessed how flexibly they regulated their size, as individuals and as breeding pairs, in response to heat stress as a successful technique to help them survive.” Versteeg said in the release. “It was a surprise to see how rapidly clownfish can adapt to a changing environment.”Similar shrinking abilities are seen in other animals, including marine iguanas. And while clownfish are the first coral reef fish that researchers have shown to shorten in response to heat stress, they may not be the last. In fact, the results could have implications for other coral reef fish, and for other fish overall. According to the researchers, fish on the whole are much smaller today than they once were. A 2023 study in Science found, for instance, that fish, in particular, are driving a decrease in size in the world’s animal populations. One possible explanation for this is that smaller species of fish are surviving over larger species of fish. Another is that fish species of all sizes are shrinking over time, with the smaller individuals of each species surviving (and thus procreating) more than the larger individuals of each species. It is possible, however, that there are other factors contributing to the smaller size of fish today, too, including the ability to shrink in size in times of stress. “If individual shrinking were widespread and happening among different species of fish, it could provide a plausible alternative hypothesis for why the size many fish species is declining,” said Theresa Rueger, the senior study author and a lecturer at Newcastle University, according to the press release. “Further studies are needed in this area.”Though the fish themselves are small and becoming smaller, the researchers say that their results raise big questions about animal size and about animal shrinking, more specifically. “We don’t know yet exactly how they do it,” Versteeg said. “But we do know that a few other animals can do this too.”Article SourcesOur writers at Discovermagazine.com use peer-reviewed studies and high-quality sources for our articles, and our editors review for scientific accuracy and editorial standards. Review the sources used below for this article:Sam Walters is a journalist covering archaeology, paleontology, ecology, and evolution for Discover, along with an assortment of other topics. Before joining the Discover team as an assistant editor in 2022, Sam studied journalism at Northwestern University in Evanston, Illinois.

Glitter gets everywhere: It clings to carpet fibers, hides in your hairline, and shows up weeks later in unexpected places. But what if this famously clingy, sparkly nuisance could actually help save a species?That’s the idea behind a new conservation initiative in Wales. The Initiative for Nature Conservation Cymru (INCC) is feeding edible cake glitter to water voles to help track their movements (literally) and better understand how to protect them. And surprisingly, it’s already showing promise.Important Ecosystem EngineersWater voles (Arvicola amphibius), often mistaken for rats, are shy little mammals that scientists call "ecosystem engineers." That means they don’t just live in their environment — they actively shape it.For example, by digging burrows and disturbing soil, water voles help create the perfect conditions for wildflowers and grasses to thrive. In turn, that attracts all kinds of pollinators like bees, butterflies, and moths. The ripple effects of their underground handiwork help boost biodiversity in a big way.But water voles, once common in England, Scotland, and Wales, are now one of the UK’s fastest-declining mammals. Habitat loss (by draining wetlands) and predation by invasive American mink have led to a staggering 90 percent decline in their numbers. Conservationists urgently need to understand where these animals are, how they move, and what they need to survive. Glitter may be able to provide such insights — with sparkling clarity.How to Get Glittery PoopINCC researchers wanted a way to trace individual voles’ movements without disturbing them or relying on expensive tracking tech. According to the BBC, the glitter they used is biodegradable, animal-safe glitter vetted by veterinarians to make sure it’s harmless to both the voles and their environment.Before releasing the idea into the wild, they tested it on captive-bred voles involved in a larger Natural Resources Wales (NRW) reintroduction project. These voles were offered apple slices dusted with the shiny stuff. Thankfully, they didn’t seem fazed at all. They munched away happily, and before long, the voles began producing glittery poop.This sparkly evidence is a potential goldmine of data. By analyzing where glitter-marked droppings turn up, conservationists can figure out where voles are hanging out, areas they’re avoiding, and how they’re navigating the landscape.Involving the PublicFollowing the successful trial of glitter in captive populations, the next phase involves applying this technique to wild water voles. The team of conservationists is also considering the use of different colors of glitter to distinguish between separate vole family groups, allowing for more detailed tracking and analysis of their movements.Once researchers can map out the territories and travel habits of wild voles, they’ll be better equipped to take targeted conservation actions. That might mean removing invasive trees like conifers from wetlands, fencing off riverbanks to keep grazing livestock at bay, or restoring habitats in ways that support safe vole dispersal.And this isn't just a job for scientists. INCC emphasizes the importance of getting local communities involved. By educating and empowering people to play a role in protecting water voles, they hope to create a sustainable, long-term conservation model that offers a glittering future for both the animals and the people living alongside them.Article SourcesOur writers at Discovermagazine.com use peer-reviewed studies and high-quality sources for our articles, and our editors review for scientific accuracy and editorial standards. Review the sources used below for this article:Greenlight: The Role of Water Voles as Ecosystem EngineersInitiative for Nature Conservation Cymru: Saving Wales's Upland Water VolesHaving worked as a biomedical research assistant in labs across three countries, Jenny excels at translating complex scientific concepts – ranging from medical breakthroughs and pharmacological discoveries to the latest in nutrition – into engaging, accessible content. Her interests extend to topics such as human evolution, psychology, and quirky animal stories. When she’s not immersed in a popular science book, you’ll find her catching waves or cruising around Vancouver Island on her longboard.

In today’s ever more connected world, it’s fair to say that some of us receive nearly as much screen time as we do actual sunlight — if not more, depending on your job and the time of year.A growing body of research shows that the blue light that these screens emit might have effects on human health, whether it’s our vision, skin, or our sleep.“Blue light has an effect on skin health and even the retina in the eyes,” says Kseniya Kobets, an assistant professor of medicine at Albert Einstein College of Medicine and the director of cosmetic dermatology at Montefiore Einstein Advanced Care.Blue Light ExposureBlue light sits in the light spectrum between ultraviolet, high-energy light, and other types of visible light that aren’t blue light and emit lower energy such as green, orange, and red light. About one third of all visible light falls into the blue light category, which is also called high-energy light (HEV).Most blue light we are exposed to comes directly from the sun. But LED lights and screens, whether it’s your television, computer, tablet, or smart phone, also emit blue light. While the amount screens emit is minimal compared to that from the sun, they are becoming increasingly ubiquitous in our lives, at all hours of the day. And some doctors are concerned that the way many hold their phones so close to their faces could also increase a negative effect.Read More: Does Blue Light Damage Skin?Is All Blue Light Bad for You?Blue light isn’t all bad. Some research has shown that low amounts of HEV can help decrease acne, for example, while other studies showed that limited exposure to the light may help some symptoms related to psoriasis and eczema, according to a review study.In fact, the U.S. Food and Drug Administration approved a wearable blue light device for the treatment of mild psoriasis.Some research has also found that blue light therapy might actually help treat certain types of skin cancer in a controlled treatment. But the relationship between blue light and cancer isn’t all beneficial.The Impact of Blue Light on Your SkinStudies on mice have shown that long-term exposure to blue light can also cause some of the conditions that lead to cancer, though the authors stated that more research is needed to confirm this.“Many of the effects of blue light on living organisms are unknown, and further research is required, including on methods of protection,” the authors stated. Blue light could cause some lesser skin problems as well, though. Kobets says that blue light can cause oxidative stress on the skin, which could cause premature skin aging and hyperpigmentation — a condition in which some skin patches become darker than others.“Most people want to avoid hyperpigmentation and uneven skin tone,” Kobets says.Other Effects of Blue LightIt’s possible that our exposure to too much blue light — especially outside of daylight hours — can suppress our production of melatonin, the hormone our body uses to help set its inner clock, or circadian rhythm. This essentially means that too much blue light at night could affect healthy sleep, Kobets says.All light can affect melatonin production, but blue light suppresses it more effectively, according to Harvard Health Publishing.Our eyes also aren’t very good at filtering out blue light. As a result, it reaches our retina, where it may damage cells. Serious exposure could also contribute to conditions like cataracts and vision loss from age-related macular degeneration. Kids are more at risk since their eyes absorb more blue light than adults.Blue Light ProtectionsThe best way to limit blue light exposure is to lower your screen time — especially at night. But Kobets also says that people can take other steps to limit the potential damage of blue light. Sunscreen can help — even in the winter or indoors.“The oxidative stress from visible blue light and its effect on DNA damage and hyperpigmentation of the skin is one of the main reasons I recommend using [sun protection factor] daily,” she says.Even makeup might help, if it has the right components. “The best makeup is the one that offers tint cover-up which contains iron oxide plus has mineral [sun protection factor] to add to the protection,” Kobets says.Other steps to help reduce damage include face masks or glasses made to shield blue light, or just simply lowering the brightness of your phone. You can also use a shield on your phone or computer screen that decreases the amount of blue light displayed. This article is not offering medical advice and should be used for informational purposes only.Article SourcesOur writers at Discovermagazine.com use peer-reviewed studies and high-quality sources for our articles, and our editors review for scientific accuracy and editorial standards. Review the sources used below for this article:Journal of Cosmetic Dermatology. Blue light protection, part II—Ingredients and performance testing methodsAmerican Academy of Dermatology Association. Can a wearable blue-light device clear psoriasis?Iowa Healthcare. Blue-light therapy warding off skin cancerHarvard Health. Blue light has a dark sideJoshua Rapp Learn is an award-winning D.C.-based science writer. An expat Albertan, he contributes to a number of science publications like National Geographic, The New York Times, The Guardian, New Scientist, Hakai, and others.

Sharks don’t have bones. Instead, their skeletons are made from mineralized cartilage that helps them constantly move through water. To understand the internal “sharkitecture” that helps keep these animals strong and graceful, researchers are putting sharks under the microscope. A new study, published in ACS Nano, found some surprising results. After analyzing shark cartilage, there appear to be two different regions within it. And each appears to have vastly different structures. These structures have shown a resistance to destruction and could inspire strong, flexible materials for the future. Analyzing a Shark Skeleton An X-ray nanotomography reconstruction of the intermedial cartilage of a blacktip shark. The colors indicate the thickness of the struts, with red representing thicker areas and blue indicating thinner ones. (Image Credit: Florida Atlantic University)Sharks are powerful and efficient creatures. Thanks to their skeletal frame, made of mineralized cartilage, their spines can act like a spring, which stores and releases energy as they move their tails, according to a press release. Wanting to better understand how this cartilage helps keep sharks atop the ocean’s food chain, researchers from the Charles E. Schmidt College of Science and the College of Engineering and Computer Science at Florida Atlantic University (FAU), in collaboration with the German Electron Synchrotron (DESY) in Germany, and NOAA Fisheries, have analyzed blacktip sharks (Carcharhinus limbatus) and mapped out their internal structure. The team used synchrotron X-ray nanotomography with detailed 3D imaging and in-situ mechanical testing to create the map. The results showed that on a nano level, the blacktip shark’s cartilage had two distinct regions, the corpus calcareum and the intermediale. Though both of these regions are made up of densely packed collagen and bioapatite, they have vastly different internal structures. Strong Microscopic Structures According to the study, in each region, the cartilage is porous and also has thick struts that help the skeleton with strain from multiple directions. This is a key adaptation as sharks are continuously moving and putting pressure on their spines.  Researchers also found microscopic needle-like bioapatite crystals, similar to those in human bones, that were lined up with strands of collagen. This is another factor that gives shark cartilage extra strength and flexibility. Along with that, the research team also noted helical fiber structures, also with collagen, which suggests the cartilage is designed to prevent any cracks from spreading, and help to distribute staring and force. “Nature builds remarkably strong materials by combining minerals with biological polymers, such as collagen – a process known as biomineralization. This strategy allows creatures like shrimp, crustaceans, and even humans to develop tough, resilient skeletons,” said Vivian Merk, senior study author and an assistant professor in the FAU Department of Chemistry and Biochemistry, in a press release.“Sharks are a striking example. Their mineral-reinforced spines work like springs, flexing and storing energy as they swim. By learning how they build such tough yet adaptable skeletons, we hope to inspire the design of next-generation materials,” Merk added in the release. Shark Inspiration for MaterialsThe research team applied pressure to microscopic pieces of the shark’s vertebrae and found deformations, smaller than one micrometer. The team only noticed fractures in the vertebrae after a second round of pressure was applied. But even then, the fractures were only found within one mineralized plane, proving how strong the material was. “After hundreds of millions of years of evolution, we can now finally see how shark cartilage works at the nanoscale – and learn from them,” said Marianne Porter, study co-author and an associate professor in the FAU Department of Biological Sciences, in a press release. “We’re discovering how tiny mineral structures and collagen fibers come together to create a material that’s both strong and flexible, perfectly adapted for a shark’s powerful swimming. These insights could help us design better materials by following nature’s blueprint,” Porter added in the release.Article SourcesOur writers at Discovermagazine.com use peer-reviewed studies and high-quality sources for our articles, and our editors review for scientific accuracy and editorial standards. Review the sources used below for this article:A graduate of UW-Whitewater, Monica Cull wrote for several organizations, including one that focused on bees and the natural world, before coming to Discover Magazine. Her current work also appears on her travel blog and Common State Magazine. Her love of science came from watching PBS shows as a kid with her mom and spending too much time binging Doctor Who.

Some humpback whales are born in warmer waters. Others are born on the way. That’s what a study in Frontiers in Marine Science seems to suggest, anyway, after showing that hundreds of East Australian humpback whales are actually born mid-migration, while their mothers are still traveling to their established calving and breeding grounds.“Hundreds of humpback calves were born well outside the established breeding grounds,” said Tracey Rogers, the senior study author and a biology professor at the University of New South Wales, according to a press release. “Giving birth along the ‘humpback highway’ means these vulnerable calves, who are not yet strong swimmers, are required to swim long distances much earlier in life than if they were born in the breeding grounds.” In fact, the study shows that these calves are sometimes born in the temperate waters around Southeastern Australia, New Zealand, and Tasmania, around 900 miles south of the traditionally assumed area. Challenging the theory that humpback migration is essential for the birth of these whales, the study provides valuable information for protecting humpback whale populations in the future. Humpback Whale Mid-Migration SightingsEvery year, Eastern Australian humpbacks travel from the polar waters of the Southern Ocean around Antarctica to the tropical waters of the South Pacific Ocean around northeastern Australia. For a long time, it was thought that this winter migration enabled the birth of these whales, with the whales having to be born in these warmer waters.“Historically, we believed that humpback whales migrating north from the nutrient-rich Southern Ocean were [traveling] to warmer, tropical waters, such as the Great Barrier Reef, to calve,” said Jane McPhee-Frew, the lead study author and a biology Ph.D. candidate at the University of New South Wales, according to another press release.But in July 2023, McPhee-Frew spotted a pair of Eastern Australian humpbacks — a mother and a calf — in the temperate waters around southeastern Australia, apparently on their way to their established calving and breeding grounds. “The calf was tiny, obviously brand new,” McPhee-Frew said in the press release. “What were they doing there?”Hoping to find out, McPhee-Frew, Rogers, and a team of five other researchers studied hundreds of observations of Eastern Australian humpbacks from around southeastern Australia, New Zealand, and Tasmania. Including information from citizen scientist sightings, scientist surveys, and beach strandings, the team examined 209 observations of calves, including 168 observations of living calves, many of which were made in 2023 and 2024. Surprisingly, some of the observations were made as far south as Port Arthur, Tasmania, with many of the mothers continuing to travel north with their newborns.According to the team, these mid-migration births are probably not a new phenomenon, as records seem to suggest that they occurred in the 1800s and 1900s, too, before the collapse of Eastern Australian humpback populations due to commercial whaling. “I think it’s very likely that this pattern has always existed, but the low number of whales obscured it from view,” McPhee-Frew said in the press release. “The Eastern Australia humpback population narrowly escaped extinction, but now there are [30,000, 40,000, or 50,000] in this population alone. It doesn’t happen overnight, but the recovery of humpback whales, and the return of their full range of behaviors and distribution, just goes to show that with good policies built on good science, we can have excellent outcomes.”Protection for Whale PopulationsA mother and baby humpback whale swimming in Kiama, New South Wales, Australia. (Image Credit: Vanessa Risku (Instagram: @droning_my_sorrows))The fact that these calves can be born on their way to the mothers’ calving and breeding grounds means that the purpose of humpback migration is much more of a mystery than typically thought. Indeed, if humpback mothers can deliver babies in temperate waters, why do they travel to tropical waters every year? Though the study cannot confirm this theory, the warm waters of northeastern Australia may offer other benefits beyond birth. For instance, they might be a potentially safer space for calves to learn and grow, even if they were born elsewhere. Such benefits might make the move worthwhile, the team says, despite the risks of delivering a newborn in the midst of migration. And there are a lot of risks. Without a newborn, the trip is long, spanning several thousand miles from the South Ocean to the South Pacific Ocean, and straight through some of the busiest swathes of sea. “This means these vulnerable animals are exposed to risks like boat strikes, entanglements, pollution, and just general public unawareness,” Rogers said in the press release. And adding a calf to the mix merely increases the risk, as newborn humpbacks are slower and weaker than their mothers. “They have those long, enormous fins that they need to grow into, and they’re not very strong swimmers. So they rest a lot of the time on their mum’s back,” Rogers said in the press release. “It’s heartbreaking to think of these young whales [traveling] through busy ports and dangerous shipping lanes with those long, clumsy fins.”The injuries on some of the observed newborns stress the need to do more to protect whales as they travel, the team says. Fortunately, with better information about where these calves and their mothers appear, protected areas and awareness campaigns can be better calibrated to save whales of all ages. “Regardless of the health of population now, we can’t be in a situation where we’re putting any age of whales — especially baby whales — in a situation where they’re getting caught in nets, being exposed to chemicals, being hit by boats and being harassed,” McPhee-Frew said in the press release. Article SourcesOur writers at Discovermagazine.com use peer-reviewed studies and high-quality sources for our articles, and our editors review for scientific accuracy and editorial standards. Review the sources used below for this article:Sam Walters is a journalist covering archaeology, paleontology, ecology, and evolution for Discover, along with an assortment of other topics. Before joining the Discover team as an assistant editor in 2022, Sam studied journalism at Northwestern University in Evanston, Illinois.