Get the Popular Science daily newsletter💡 Breakthroughs, discoveries, and DIY tips sent every weekday. Probiotics are everywhere, claiming to help us poop, restore gut health, and more. They can also be used to help threatened coral reefs. A bacterial probiotic has helped slow the spread of stony coral tissue loss disease (SCTLD) in wild corals in Florida that were already infected with the disease. The findings are detailed in a study published June 5 in the journal Frontiers in Marine Science and show that applying this new probiotic treatment across coral colines helped prevent further tissue loss. What is stony coral tissue loss disease (SCTLD)? SCTLD first emerged in Florida in 2014. In the 11 years since, it has rapidly spread throughout the Caribbean. This mysterious ailment has been confirmed in at least 20 other countries and territories. Other coral pathogens typically target specific species. SCTLD infects more than 30 different species of stony corals, including pillar corals and brain corals. The disease causes the soft tissue in the corals to slough off, leaving behind white patches of exposed skeleton. The disease can devastate an entire coral colony in only a few weeks to months.  A great star coral (Montastraea cavernosa) colony infected with stony coral tissue lossdisease (SCTLD) on the coral reef in Fort Lauderdale, FL. The lesion, where the white band of tissue occurs, typically moves across the coral, killing coral tissue along the way. CREDIT: KellyPitts, Smithsonian. The exact cause of SCTLD is still unknown, but it appears to be linked to some kind of harmful bacteria. Currently, the most common treatment for SCTLD is using a paste that contains the antibiotic amoxicillin on diseased corals. However, antibiotics are not a silver bullet. This amoxicillin balm can temporarily halt SCTLD’s spread, but it needs to be frequently reapplied to the lesions on the corals. This takes time and resources, while increasing the likelihood that the microbes causing SCTLD might develop resistance to amoxicillin and related antibiotics. “Antibiotics do not stop future outbreaks,” Valerie Paul, a study co-author and the head scientist at the Smithsonian Marine Station at Fort Pierce, Florida, said in a statement. “The disease can quickly come back, even on the same coral colonies that have been treated.” Finding the right probiotic Paul and her colleagues have spent over six years investigating whether beneficial microorganisms (aka probiotics) could be a longer lasting alternative to combat this pathogen. Just like humans, corals are host to communities known as microbiomes that are bustling with all different types of bacteria. Some of these miniscule organisms produce antioxidants and vitamins that can help keep their coral hosts healthy.  First, the team looked at the microbiomes of corals that are impervious to SCTLD to try and harvest probiotics from these disease-resistant species. In theory, these could be used to strengthen the microbiomes of susceptible corals.  They tested over 200 strains of bacteria from disease-resistant corals and published a study in 2023 about the probiotic Pseudoalteromonas sp. McH1-7 (or McH1-7 for short). Taken from the great star coral (Montastraea cavernosa), this probiotic produces several antibacterial compounds. Having such a stacked antibacterial toolbox made McH1-7 an ideal candidate to combat a pathogen like SCTLD. They initially tested McH1-7 on live pieces of M. cavernosa and found that the probiotic reliably prevented the spread of SCTLD in the lab. After these successful lab tests, the wild ocean called next. Testing in the ocean The team conducted several field tests on a shallow reef near Fort Lauderdale, focusing on 40 M. cavernosa colonies that showed signs of SCTLD. Some of the corals in these colonies received a paste containing the probiotic McH1-7 that was applied directly to the disease lesions. They treated the other corals with a solution of seawater containing McH1-7 and covered them using weighted plastic bags. The probiotics were administered inside the bag in order to cover the entire coral colony.   “This created a little mini-aquarium that kept the probiotics around each coral colony,” Paul said. For two and a half years, they monitored the colonies, taking multiple rounds of tissue and mucus samples to see how the corals’ microbiomes were changing over time. They found that  the McH1-7 probiotic successfully slowed the spread of SCTLD when it was delivered to the entire colony using the bag and solution method. According to the samples, the probiotic was effective without dominating the corals’ natural microbes.  Kelly Pitts, a research technician with the Smithsonian Marine Station at Ft. Pierce, Floridaand co-lead author of the study treats great star coral (Montaststraea cavernosa) colonies infected with SCTLD with probiotic strain McH1-7 by covering the coral colony in a plastic bag, injecting a probiotic bacteria solution into the bag and leaving the bag for two hours to allow for the bacteria to colonize on the coral. CREDIT: Hunter Noren. Fighting nature with nature While using this probiotic appears to be an effective treatment for SCTLD among the reefs of northern Florida, additional work is needed to see how it could work in other regions. Similar tests on reefs in the Florida Keys have been conducted, with mixed preliminary results, likely due to regional differences in SCTLD. The team believes that probiotics still could become a crucial tool for combatting SCTLD across the Caribbean, especially as scientists fine tune how to administer them. Importantly, these beneficial bacteria support what corals already do naturally.  “Corals are naturally rich with bacteria and it’s not surprising that the bacterial composition is important for their health,” Paul said. “We’re trying to figure out which bacteria can make these vibrant microbiomes even stronger.”

A Deadly Disease Is Eating Away at Caribbean Corals and Wreaking Havoc on Reefs. Could Probiotics Be the Solution? New research suggests the probiotic McH1-7 could help stop the spread of stony coral tissue loss disease among wild corals near Fort Lauderdale, Florida Scientists determined the most effective method of halting the disease was covering a coral colony with a weighted plastic bag, then injecting a seawater solution that contains the probiotic. They left the colony covered for two hours to allow the probiotic bacteria to colonize the coral. Hunter Noren Probiotics can be good for human health. Now, new research suggests they might also help protect coral reefs. A bacterial probiotic helped slow the advance of stony coral tissue loss disease—a fast-spreading and deadly condition—among wild corals in Florida, researchers report today in a new study published in the journal Frontiers in Marine Science. The probiotic may be a good alternative to antibiotics like amoxicillin, which temporarily curb the spread of the disease but must be reapplied frequently. In addition, scientists fear stony coral tissue loss disease may one day become resistant to these antibiotic treatments—just as “superbugs” that infect humans are building resistance to our own drugs. Antibiotics are meant to kill microorganisms, but probiotics are beneficial living microbes. The idea is that a probiotic can be incorporated into corals’ natural microbiomes, ideally offering them longer-lasting protection. First discovered in Florida in 2014, stony coral tissue loss disease attacks the soft tissue of more than 30 different species of coral. Without treatment, the disease eventually kills the corals, and their soft tissue falls off, revealing the white calcium carbonate skeleton below. In just weeks or months, it can devastate a whole colony. Stony coral tissue loss disease can be spread by fish that eat coral, as well as by boaters and divers who do not disinfect their gear. The condition has since expanded its range beyond Florida to reefs throughout the Caribbean. Several years ago, researchers looking at the great star coral (Montastraea cavernosa) discovered a probiotic called Pseudoalteromonas sp. strain McH1-7. Laboratory tests showed McH1-7 stopped or slowed the progression of stony coral tissue loss disease in infected corals. It also helped prevent the disease from spreading to healthy corals. But that was in the lab. Would McH1-7 be similarly effective in the ocean? Researchers were eager to find out, so they set up an experiment on a shallow reef off the coast of Fort Lauderdale. Study co-author Kelly Pitts, a research technician with the Smithsonian Marine Station, applies a paste containing the probiotic directly onto the disease lesion of an infected coral. Hunter Noren Experimenting with wild corals For the study, the scientists focused on 40 great star coral colonies that were showing symptoms of stony coral tissue loss disease. In one experimental condition, the researchers made a paste that contained McH1-7 and applied it directly onto the disease lesions. For comparison, they also applied the same paste, minus the probiotic, to some corals. In another condition, they covered infected coral colonies with weighted plastic bags, then filled the bags with seawater solutions made with and without McH1-7. They left the corals covered for two hours. “This created a little mini-aquarium that kept the probiotics around each coral colony,” says study co-author Valerie Paul, head scientist at the Smithsonian Marine Station at Fort Pierce, Florida, in a statement. The scientists completed all the treatments within the first 4.5 months of the project. Then, they returned periodically to gather tissue and mucus samples from the corals to measure changes to their microbiomes. Over the next 2.5 years, they took photos from a variety of different angles, which they then used to create 3D models that could track the disease’s progression. In the end, the results suggest covering the corals with plastic bags filled with the probiotic seawater solution was the most effective method. More than two years post-treatment, the colonies that received the probiotic bag had lost just 7 percent of their tissue, while colonies in the control bag condition faced 35 percent tissue loss. Scientists applied a probiotic paste directly to disease lesions on some corals. Kelly Pitts The probiotic paste, by contrast, appears to have made the situation worse: The corals that had the probiotic paste applied directly to their lesions lost more tissue than those treated with the control paste, which did not contain McH1-7. “We do not really know what is going on with the probiotic paste treatment,” Paul tells Smithsonian magazine in an email. But she has a few theories. It’s possible the high concentrations of McH1-7 contributed to localized hypoxia, or low-oxygen conditions that further harmed the already stressed corals, she says. Or, the probiotic could have changed the microbiome at the lesion site in some negative way. Another possibility is that McH1-7 produces antibiotics or other substances that were harmful at high concentrations. Amanda Alker, a marine microbiologist at the University of Rhode Island who was not involved with the study, wonders if this finding suggests McH1-7 is beneficial at specific dosages—a question future laboratory research might be able to answer, she tells Smithsonian magazine in an email. She’s also curious to know which specific molecular components of the probiotic are responsible for the increased tissue loss when applied as a paste. More broadly, Alker would like to see additional experiments validating the bag treatment method, but she says this “inventive” technique seems promising. “Their approach is a safer solution than antibiotic treatment methods that have been deployed to combat [stony coral tissue loss disease] in the field so far,” she says. “Further, this is a practical solution that could be implemented widely because it doesn’t require highly specialized equipment and has the ability to be used with any type of microbial solution.” Looking ahead to save reefs Probiotics are likely not a silver bullet for protecting corals. For one, researchers still don’t know exactly what causes stony coral tissue loss disease, which makes it difficult to determine how or why the probiotic works, Paul says. In addition, since the disease has spread to many different parts of the Caribbean, it might be challenging to use the bag treatment technique on all affected colonies. “We would need to develop better methods of deploying the probiotic through time release formulations or other ways to scale up treatments,” Paul says. “Right now, having divers swim around underwater with weighted bags is not a very scalable method.” The researchers have also conducted similar experiments on infected corals located farther south, in the Florida Keys. However, these tests have produced mixed results, probably because of regional differences in stony coral tissue loss disease. This is another hurdle scientists will likely need to overcome if they hope to expand the use of probiotics. “We probably need to develop different probiotics for different coral species and different regions of the Caribbean,” Paul says. Researchers returned to gather samples of tissues and mucus to see how the corals' microbiomes had changed. Hunter Noren Even so, scientists are heartened by the results of the experiments conducted near Fort Lauderdale. With more research, the findings suggest probiotics could be a promising tool for combatting the disease elsewhere. “Coral probiotics is a challenging field, because there are hundreds of different types of bacteria that associate with corals, and there are limitless experiments that need to be performed,” Amy Apprill, a marine chemist at Woods Hole Oceanographic Institution who was not involved with the research, tells Smithsonian magazine in an email. “These researchers made a major advance with their study by demonstrating the utility of whole colony treatment as well as the specific probiotic tested.” Apprill adds that, while antibiotics have been widely used to control stony coral tissue loss disease, scientists haven’t conducted much research to see how these treatments are affecting the plants and creatures that live nearby. “Using a naturally occurring bacterium for disease treatment may result in lessened impacts to other members of the coral reef ecosystem,” she says. Amid rising ocean temperatures, scientists expect to find even more diseased coral colonies in the future. Warmer waters may also allow other pathogens to thrive and proliferate. Against that backdrop, Apprill adds, probiotics and the different methods of applying them will be “major allies” in the fight to save coral reefs. Paul is also optimistic. Through research and field studies, she’s confident researchers will be able to develop interventions that can “help corals better survive changing environments and respond better to diseases and bleaching,” she says. Get the latest stories in your inbox every weekday.

Satellite view of coral reefs in New CaledoniaShutterstock/BEST-BACKGR​OUNDS There might be an upside to the loss of coral reefs. Their decline would mean oceans can absorb up to 5 per cent more carbon dioxide by 2100, researchers estimate, slowing the build up of this greenhouse gas in Earth’s atmosphere. “It is a beneficial effect if you only care about the concentration of CO2 in the atmosphere,” says Lester Kwiatkowski at Sorbonne University in Paris, France. But the decline of corals will also reduce biodiversity, harm fisheries and leave many coasts more exposed to rising seas, he says. Advertisement How much the world will warm depends mainly on the level of CO2 in the atmosphere. So far the land and oceans have been soaking up around half of the extra CO2 we have emitted. Any factors that increase or decrease these so-called land or ocean carbon sinks could therefore have a significant impact on future warming. It is often assumed that corals remove CO2 from seawater as they grow their calcium carbonate skeletons. In fact, the process, also known as calcification, is a net source of CO2. “You’re taking inorganic carbon in the ocean, generally in the form of carbonate and bicarbonate ions, turning it into calcium carbonate and that process releases CO2 into the seawater, some of which will be lost to the atmosphere,” says Kwiatkowski. Unmissable news about our planet delivered straight to your inbox every month. Sign up to newsletter This means that if reef formation around the world slows or even reverses, less CO2 will be released by reefs and the oceans will be able to absorb more of this greenhouse gas from the atmosphere – a factor not currently included in climate models. Observations suggest coral reef calcification is already declining as rising seawater temperatures cause mass coral bleaching and die-offs. The higher level of CO2 is also making oceans more acidic, which can make it harder to build carbonate skeletons and even lead to their dissolution. Kwiatkowski and his team took published estimates of how corals will be affected by warming and ocean acidification and used a computer model to work out how this might change the ocean sink in various emission scenarios. They conclude that the oceans could take up between 1 and 5 per cent more carbon by 2100, and up to 13 per cent more by 2300. This doesn’t take account of other factors that can cause reef decline such as overfishing and the spread of coral diseases, says Kwiatkowski, so might even be an underestimate. On the other hand, the work assumes that corals aren’t able to adapt or acclimatise, says Chris Jury at the University of Hawai’i at Manoa, who wasn’t involved in the study. “If the worst-case or even medium-case scenario in this study comes to pass, it means the near-total destruction of coral reefs globally,” says Jury. “I think that with consideration of realistic levels of adaptation and acclimatisation by corals and other reef organisms, the authors might come to different conclusions under a low to moderate level of climate change.” If Kwiatkowski’s team is correct, it means that the amount of emitted CO2 that will lead to a given level of warming – the so-called carbon budget – is a little larger than currently thought. “I think we would like our budgets to be as accurate as possible, even if we’re blowing through them,” says Kwiatkowski. Journal reference:PNAS DOI: 10.1073/pnas.2501562122 Topics:

A California-based company called Magrathea just turned on a new electrolyzer that can make magnesium metal from seawater. The technology has the potential to produce the material, which is used in vehicles and defense applications, with net-zero greenhouse-gas emissions. Magnesium is an incredibly light metal, and it’s used for parts in cars and planes, as well as in aluminum alloys like those in vehicles. The metal is also used in defense and industrial applications, including the production processes for steel and titanium. Today, China dominates production of magnesium, and the most common method generates a lot of the emissions that cause climate change. If Magrathea can scale up its process, it could help provide an alternative source of the metal and clean up industries that rely on it, including automotive manufacturing. The star of Magrathea’s process is an electrolyzer, a device that uses electricity to split a material into its constituent elements. Using an electrolyzer in magnesium production isn’t new, but Magrathea’s approach represents an update. “We really modernized it and brought it into the 21st century,” says Alex Grant, Magrathea’s cofounder and CEO. The whole process starts with salty water. There are small amounts of magnesium in seawater, as well as in salt lakes and groundwater. (In seawater, the concentration is about 1,300 parts per million, so magnesium makes up about 0.1% of seawater by weight.) If you take that seawater or brine and clean it up, concentrate it, and dry it out, you get a solid magnesium chloride salt. Magrathea takes that salt (which it currently buys from Cargill) and puts it into the electrolyzer. The device reaches temperatures of about 700 °C (almost 1,300 °F) and runs electricity through the molten salt to split the magnesium from the chlorine, forming magnesium metal. Typically, running an electrolyzer in this process would require a steady source of electricity. The temperature is generally kept just high enough to maintain the salt in a molten state. Allowing it to cool down too much would allow it to solidify, messing up the process and potentially damaging the equipment. Heating it up more than necessary would just waste energy.  Magrathea’s approach builds in flexibility. Basically, the company runs its electrolyzer about 100 °C higher than is necessary to keep the molten salt a liquid. It then uses the extra heat in inventive ways, including to dry out the magnesium salt that eventually goes into the reactor. This preparation can be done intermittently, so the company can take in electricity when it’s cheaper or when more renewables are available, cutting costs and emissions. In addition, the process will make a co-product, called magnesium oxide, that can be used to trap carbon dioxide from the atmosphere, helping to cancel out the remaining carbon pollution. The result could be a production process with net-zero emissions, according to an independent life cycle assessment completed in January. While it likely won’t reach this bar at first, the potential is there for a much more climate-friendly process than what’s used in the industry today, Grant says. Breaking into magnesium production won’t be simple, says Simon Jowitt, director of the Nevada Bureau of Mines and of the Center for Research in Economic Geology at the University of Nevada, Reno. China produces roughly 95% of the global supply as of 2024, according to data from the US Geological Survey. This dominant position means companies there can flood the market with cheap metal, making it difficult for others to compete. “The economics of all this is uncertain,” Jowitt says. The US has some trade protections in place, including an anti-dumping duty, but newer players with alternative processes can still face obstacles. US Magnesium, a company based in Utah, was the only company making magnesium in the US in recent years, but it shut down production in 2022 after equipment failures and a history of environmental concerns.  Magrathea plans to start building a demonstration plant in Utah in late 2025 or early 2026, which will have a capacity of roughly 1,000 tons per year and should be running in 2027. In February the company announced that it signed an agreement with a major automaker, though it declined to share its name on the record. The automaker pre-purchased material from the demonstration plant and will incorporate it into existing products. After the demonstration plant is running, the next step would be to build a commercial plant with a larger capacity of around 50,000 tons annually.

LUBBOCK — Every winter, after the sea of cotton has been harvested in the South Plains and the ground looks barren, technicians with the High Plains Underground Water Conservation District check the water levels in nearly 75,000 wells across 16 counties. For years, their measurements have shown what farmers and water conservationists fear most—the Ogallala Aquifer, an underground water source that’s the lifeblood of the South Plains agriculture industry, is running dry. That’s because of a century-old law called the rule of capture. The rule is simple: If you own the land above an aquifer in Texas, the water underneath is yours. You can use as much as you want, as long as it’s not wasted or taken maliciously. The same applies to your neighbor. If they happen to use more water than you, then that’s just bad luck. To put it another way, landowners can mostly pump as much water as they choose without facing liability to surrounding landowners whose wells might be depleted as a result. Following the Dust Bowl—and to stave off catastrophe—state lawmakers created groundwater conservation districts in 1949 to protect what water is left. But their power to restrict landowners is limited. “The mission is to save as much water possible for as long as possible, with as little impact on private property rights as possible,” said Jason Coleman, manager for the High Plains Underground Water Conservation District. “How do you do that? It’s a difficult task.” A 1953 map of the wells in Lubbock County hangs in the office of the groundwater district. [Photo: Annie Rice for The Texas Tribune] Rapid population growth, climate change, and aging water infrastructure all threaten the state’s water supply. Texas does not have enough water to meet demand if the state is stricken with a historic drought, according to the Texas Water Development Board, the state agency that manages Texas’ water supply. Lawmakers want to invest in every corner to save the state’s water. This week, they reached a historic $20 billion deal on water projects. High Plains Underground Water District General Manager Jason Coleman stands in the district’s meeting room on May 21 in Lubbock. [Photo: Annie Rice for The Texas Tribune] But no one wants to touch the rule of capture. In a state known for rugged individualism, politically speaking, reforming the law is tantamount to stripping away freedoms. “There probably are opportunities to vest groundwater districts with additional authority,” said Amy Hardberger, director for the Texas Tech University Center for Water Law and Policy. “I don’t think the political climate is going to do that.” State Sen. Charles Perry, a Lubbock Republican, and Rep. Cody Harris, a Palestine Republican, led the effort on water in Austin this year. Neither responded to requests for comment. Carlos Rubinstein, a water expert with consulting firm RSAH2O and a former chairman of the water development board, said the rule has been relied upon so long that it would be near impossible to undo the law. “I think it’s better to spend time working within the rules,” Rubinstein said. “And respect the rule of capture, yet also recognize that, in and of itself, it causes problems.” Even though groundwater districts were created to regulate groundwater, the law effectively stops them from doing so, or they risk major lawsuits. The state water plan, which spells out how the state’s water is to be used, acknowledges the shortfall. Groundwater availability is expected to decline by 25% by 2070, mostly due to reduced supply in the Ogallala and Edwards-Trinity aquifers. Together, the aquifers stretch across West Texas and up through the Panhandle. By itself, the Ogallala has an estimated three trillion gallons of water. Though the overwhelming majority in Texas is used by farmers. It’s expected to face a 50% decline by 2070. Groundwater is 54% of the state’s total water supply and is the state’s most vulnerable natural resource. It’s created by rainfall and other precipitation, and seeps into the ground. Like surface water, groundwater is heavily affected by ongoing droughts and prolonged heat waves. However, the state has more say in regulating surface water than it does groundwater. Surface water laws have provisions that cut supply to newer users in a drought and prohibit transferring surface water outside of basins. Historically, groundwater has been used by agriculture in the High Plains. However, as surface water evaporates at a quicker clip, cities and businesses are increasingly interested in tapping the underground resource. As Texas’ population continues to grow and surface water declines, groundwater will be the prize in future fights for water. In many ways, the damage is done in the High Plains, a region that spans from the top of the Panhandle down past Lubbock. The Ogallala Aquifer runs beneath the region, and it’s faced depletion to the point of no return, according to experts. Simply put: The Ogallala is not refilling to keep up with demand. “It’s a creeping disaster,” said Robert Mace, executive director of the Meadows Center for Water and the Environment. “It isn’t like you wake up tomorrow and nobody can pump anymore. It’s just happening slowly, every year.” [Image: Yuriko Schumacher/The Texas Tribune] Groundwater districts and the law The High Plains Water District was the first groundwater district created in Texas. Over a protracted multi-year fight, the Legislature created these new local government bodies in 1949, with voter approval, enshrining the new stewards of groundwater into the state Constitution. If the lawmakers hoped to embolden local officials to manage the troves of water under the soil, they failed. There are areas with groundwater that don’t have conservation districts. Each groundwater districts has different powers. In practice, most water districts permit wells and make decisions on spacing and location to meet the needs of the property owner. The one thing all groundwater districts have in common: They stop short of telling landowners they can’t pump water. In the seven decades since groundwater districts were created, a series of lawsuits have effectively strangled groundwater districts. Even as water levels decline from use and drought, districts still get regular requests for new wells. They won’t say no out of fear of litigation. The field technician coverage area is seen in Nathaniel Bibbs’ office at the High Plains Underground Water District. Bibbs is a permit assistant for the district. [Photo: Annie Rice for The Texas Tribune] “You have a host of different decisions to make as it pertains to management of groundwater,” Coleman said. “That list has grown over the years.” The possibility of lawsuits makes groundwater districts hesitant to regulate usage or put limitations on new well permits. Groundwater districts have to defend themselves in lawsuits, and most lack the resources to do so. A well spacing guide is seen in Nathaniel Bibbs’ office. [Photo: Annie Rice for The Texas Tribune] “The law works against us in that way,” Hardberger, with Texas Tech University, said. “It means one large tool in our toolbox, regulation, is limited.” The most recent example is a lawsuit between the Braggs Farm and the Edwards Aquifer Authority. The farm requested permits for two pecan orchards in Medina County, outside San Antonio. The authority granted only one and limited how much water could be used based on state law. It wasn’t an arbitrary decision. The authority said it followed the statute set by the Legislature to determine the permit. “That’s all they were guaranteed,” said Gregory Ellis, the first general manager of the authority, referring to the water available to the farm. The Braggs family filed a takings lawsuit against the authority. This kind of claim can be filed when any level of government—including groundwater districts—takes private property for public use without paying for the owner’s losses. Braggs won. It is the only successful water-related takings claim in Texas, and it made groundwater laws murkier. It cost the authority $4.5 million. “I think it should have been paid by the state Legislature,” Ellis said. “They’re the ones who designed that permitting system. But that didn’t happen.” An appeals court upheld the ruling in 2013, and the Texas Supreme Court denied petitions to consider appeals. However, the state’s supreme court has previously suggested the Legislature could enhance the powers of the groundwater districts and regulate groundwater like surface water, just as many other states have done. While the laws are complicated, Ellis said the fundamental rule of capture has benefits. It has saved Texas’ legal system from a flurry of lawsuits between well owners. “If they had said ‘Yes, you can sue your neighbor for damaging your well,’ where does it stop?” Ellis asked. “Everybody sues everybody.” Coleman, the High Plains district’s manager, said some people want groundwater districts to have more power, while others think they have too much. Well owners want restrictions for others, but not on them, he said. “You’re charged as a district with trying to apply things uniformly and fairly,” Coleman said. Can’t reverse the past Two tractors were dropping seeds around Walt Hagood’s farm as he turned on his irrigation system for the first time this year. He didn’t plan on using much water. It’s too precious. The cotton farm stretches across 2,350 acres on the outskirts of Wolfforth, a town 12 miles southwest of Lubbock. Hagood irrigates about 80 acres of land, and prays that rain takes care of the rest. Walt Hagood drives across his farm on May 12, in Wolfforth. Hagood utilizes “dry farming,” a technique that relies on natural rainfall. [Photo: Annie Rice for The Texas Tribune] “We used to have a lot of irrigated land with adequate water to make a crop,” Hagood said. “We don’t have that anymore.” The High Plains is home to cotton and cattle, multi-billion-dollar agricultural industries. The success is in large part due to the Ogallala. Since its discovery, the aquifer has helped farms around the region spring up through irrigation, a way for farmers to water their crops instead of waiting for rain that may not come. But as water in the aquifer declines, there are growing concerns that there won’t be enough water to support agriculture in the future. At the peak of irrigation development, more than 8.5 million acres were irrigated in Texas. About 65% of that was in the High Plains. In the decades since the irrigation boom, High Plains farmers have resorted to methods that might save water and keep their livelihoods afloat. They’ve changed their irrigation systems so water is used more efficiently. They grow cover crops so their soil is more likely to soak up rainwater. Some use apps to see where water is needed so it’s not wasted. A furrow irrigation is seen at Walt Hagood’s cotton farm. [Photo: Annie Rice for The Texas Tribune] Farmers who have not changed their irrigation systems might not have a choice in the near future. It can take a week to pump an inch of water in some areas from the aquifer because of how little water is left. As conditions change underground, they are forced to drill deeper for water. That causes additional problems. Calcium can build up, and the water is of poorer quality. And when the water is used to spray crops through a pivot irrigation system, it’s more of a humidifier as water quickly evaporates in the heat. According to the groundwater district’s most recent management plan, 2 million acres in the district use groundwater for irrigation. About 95% of water from the Ogallala is used for irrigated agriculture. The plan states that the irrigated farms “afford economic stability to the area and support a number of other industries.” The state water plan shows groundwater supply is expected to decline, and drought won’t be the only factor causing a shortage. Demand for municipal use outweighs irrigation use, reflecting the state’s future growth. In Region O, which is the South Plains, water for irrigation declines by 2070 while demand for municipal use rises because of population growth in the region. Coleman, with the High Plains groundwater district, often thinks about how the aquifer will hold up with future growth. There are some factors at play with water planning that are nearly impossible to predict and account for, Coleman said. Declining surface water could make groundwater a source for municipalities that didn’t depend on it before. Regions known for having big, open patches of land, like the High Plains, could be attractive to incoming businesses. People could move to the country and want to drill a well, with no understanding of water availability. The state will continue to grow, Coleman said, and all the incoming businesses and industries will undoubtedly need water. “We could say ‘Well, it’s no one’s fault. We didn’t know that factory would need 20,000 acre-feet of water a year,” Coleman said. “It’s not happening right now, but what’s around the corner?” Coleman said this puts agriculture in a tenuous position. The region is full of small towns that depend on agriculture and have supporting businesses, like cotton gins, equipment and feed stores, and pesticide and fertilizer sprayers. This puts pressure on the High Plains water district, along with the two regional water planning groups in the region, to keep agriculture alive. “Districts are not trying to reduce pumping down to a sustainable level,” said Mace with the Meadows Foundation. “And I don’t fault them for that, because doing that is economic devastation in a region with farmers.” Hagood, the cotton farmer, doesn’t think reforming groundwater rights is the way to solve it. What’s done is done, he said. “Our U.S. Constitution protects our private property rights, and that’s what this is all about,” Hagood said. “Any time we have a regulation and people are given more authority, it doesn’t work out right for everybody.” Rapid population growth, climate change, and aging water infrastructure all threaten the state’s water supply. [Photo: Annie Rice for The Texas Tribune] What can be done The state water plan recommends irrigation conservation as a strategy. It’s also the least costly water management method. But that strategy is fraught. Farmers need to irrigate in times of drought, and telling them to stop can draw criticism. In Eastern New Mexico, the Ogallala Land and Water Conservancy, a nonprofit organization, has been retiring irrigation wells. Landowners keep their water rights, and the organization pays them to stop irrigating their farms. Landowners get paid every year as part of the voluntary agreement, and they can end it at any point. Ladona Clayton, executive director of the organization, said they have been criticized, with their efforts being called a “war” and “land grab.” They also get pushback on why the responsibility falls on farmers. She said it’s because of how much water is used for irrigation. They have to be aggressive in their approach, she said. The aquifer supplies water to the Cannon Air Force Base. “We don’t want them to stop agricultural production,” Clayton said. “But for me to say it will be the same level that irrigation can support would be untrue.” There is another possible lifeline that people in the High Plains are eyeing as a solution: the Dockum Aquifer. It’s a minor aquifer that underlies part of the Ogallala, so it would be accessible to farmers and ranchers in the region. The High Plains Water District also oversees this aquifer. If it seems too good to be true—that the most irrigated part of Texas would just so happen to have another abundant supply of water flowing underneath—it’s because there’s a catch. The Dockum is full of extremely salty brackish water. Some counties can use the water for irrigation and drinking water without treatment, but it’s unusable in others. According to the groundwater district, a test well in Lubbock County pulled up water that was as salty as seawater. Rubinstein, the former water development board chairman, said there are pockets of brackish groundwater in Texas that haven’t been tapped yet. It would be enough to meet the needs on the horizon, but it would also be very expensive to obtain and use. A landowner would have to go deeper to get it, then pump the water over a longer distance. “That costs money, and then you have to treat it on top of that,” Rubinstein said. “But, it is water.” Landowners have expressed interest in using desalination, a treatment method to lower dissolved salt levels. Desalination of produced and brackish water is one of the ideas that was being floated around at the Legislature this year, along with building a pipeline to move water across the state. Hagood, the farmer, is skeptical. He thinks whatever water they move could get used up before it makes it all the way to West Texas. There is always brackish groundwater. Another aquifer brings the chance of history repeating—if the Dockum aquifer is treated so its water is usable, will people drain it, too? Hagood said there would have to be limits. Disclosure: Edwards Aquifer Authority and Texas Tech University have been financial supporters of The Texas Tribune. Financial supporters play no role in the Tribune’s journalism. Find a complete list of them here. This article originally appeared in The Texas Tribune, a member-supported, nonpartisan newsroom informing and engaging Texans on state politics and policy. Learn more at texastribune.org.

This is today’s edition of The Download, our weekday newsletter that provides a daily dose of what’s going on in the world of technology. OpenAI: The power and the pride OpenAI’s release of ChatGPT 3.5 set in motion an AI arms race that has changed the world. How that turns out for humanity is something we are still reckoning with and may be for quite some time. But a pair of recent books both attempt to get their arms around it.In Empire of AI: Dreams and Nightmares in Sam Altman’s OpenAI, Karen Hao tells the story of the company’s rise to power and its far-reaching impact all over the world. Meanwhile, The Optimist: Sam Altman, OpenAI, and the Race to Invent the Future, by the Wall Street Journal’s Keach Hagey, homes in more on Altman’s personal life, from his childhood through the present day, in order to tell the story of OpenAI.  Both paint complex pictures and show Altman in particular as a brilliantly effective yet deeply flawed creature of Silicon Valley—someone capable of always getting what he wants, but often by manipulating others. Read the full review.—Mat Honan This startup wants to make more climate-friendly metal in the US The news: A California-based company called Magrathea just turned on a new electrolyzer that can make magnesium metal from seawater. The technology has the potential to produce the material, which is used in vehicles and defense applications, with net-zero greenhouse-gas emissions. Why it matters: Today, China dominates production of magnesium, and the most common method generates a lot of the emissions that cause climate change. If Magrathea can scale up its process, it could help provide an alternative source of the metal and clean up industries that rely on it, including automotive manufacturing. Read the full story. —Casey Crownhart A new sodium metal fuel cell could help clean up transportation A new type of fuel cell that runs on sodium metal could one day help clean up sectors where it’s difficult to replace fossil fuels, like rail, regional aviation, and short-distance shipping. The device represents a departure from technologies like lithium-based batteries and is more similar conceptually to hydrogen fuel cell systems. The sodium-air fuel cell has a higher energy density than lithium-ion batteries and doesn’t require the super-cold temperatures or high pressures that hydrogen does, making it potentially more practical for transport. Read the full story. —Casey Crownhart The must-reads I’ve combed the internet to find you today’s most fun/important/scary/fascinating stories about technology. 1 The US state department is considering vetting foreign students’ social mediaAfter ordering US embassies to suspend international students’ visa appointments. (Politico)+ Applicants’ posts, shares and comments could be assessed. (The Guardian)+ The Trump administration also wants to cut off Harvard’s funding. (NYT $) 2 SpaceX’s rocket exploded during its test flight It’s the third consecutive explosion the company has suffered this year. (CNBC)+ It was the first significant attempt to reuse Starship hardware. (Space)+ Elon Musk is fairly confident the problem with the engine bay has been resolved. (Ars Technica)3 The age of AI layoffs is hereAnd it’s taking place in conference rooms, not on factory floors. (Quartz)+ People are worried that AI will take everyone’s jobs. We’ve been here before. (MIT Technology Review)4 Thousands of IVF embryos in Gaza were destroyed by Israeli strikesAn attack destroyed the fertility clinic where they were housed. (BBC)+ Inside the strange limbo facing millions of IVF embryos. (MIT Technology Review) 5 China’s overall greenhouse gas emissions have fallen for the first timeEven as energy demand has risen. (Vox)+ China’s complicated role in climate change. (MIT Technology Review) 6 The sun is damaging Starlink’s satellitesIts eruptions are reducing the satellite’s lifespans. (New Scientist $)+ Apple’s satellite connectivity dreams are being thwarted by Musk. (The Information $) 7 European companies are struggling to do business in ChinaEven the ones that have operated there for decades. (NYT $)+ The country’s economic slowdown is making things tough. (Bloomberg $) 8 US hospitals are embracing helpful robotsThey’re delivering medications and supplies so nurses don’t have to. (FT $)+ Will we ever trust robots? (MIT Technology Review) 9 Meet the people who write the text messages on your favorite show They try to make messages as realistic, and intriguing, as possible. (The Guardian) 10 Robot dogs are delivering parcels in AustinWell, over 100 yard distances at least. (TechCrunch) Quote of the day “I wouldn’t say there’s hope. I wouldn’t bet on that.” —Michael Roll, a partner at law firm Roll & Harris, explains to Wired why businesses shouldn’t get their hopes up over obtaining refunds for Donald Trump’s tariff price hikes. One more thing Is the digital dollar dead?In 2020, digital currencies were one of the hottest topics in town. China was well on its way to launching its own central bank digital currency, or CBDC, and many other countries launched CBDC research projects, including the US.How things change. The digital dollar—even though it doesn’t exist—has now become political red meat, as some politicians label it a dystopian tool for surveillance. So is the dream of the digital dollar dead? Read the full story. —Mike Orcutt We can still have nice things A place for comfort, fun and distraction to brighten up your day. (Got any ideas? Drop me a line or skeet ’em at me.) + Recently returned from vacation? Here’s how to cope with coming back to reality.+ Reconnecting with friends is one of life’s great joys.+ A new Parisian cocktail bar has done away with ice entirely in a bid to be more sustainable.+ Why being bored is good for you—no, really.

Blue tarps attempt to cover up the damage to North Korea's new destroyer. Satellite image ©2025 Maxar Technologies 2025-05-23T18:28:00Z Save Saved Read in app This story is available exclusively to Business Insider subscribers. Become an Insider and start reading now. Have an account? North Korea's naval gaffe with a 5,000-ton destroyer's launch can be seen from space. A photo shows the warship capsized in the water after a botched launch. State media said a furious Kim slammed the mistake as a "serious accident and criminal act." New satellite images of the Chongjin port in North Korea show the aftermath of a failed ship launch on Wednesday: a capsized new destroyer still partially resting on the pier. The ship's internal compartments are almost certainly flooded, complicating efforts to right it.Calling the event a "serious accident" on Thursday, North Korean state media reported that the country's leader, Kim Jong Un, was watching the ceremony as the ship's stern slid down a ramp ahead of schedule, jamming the entire vessel.Satellite imagery from Airbus and Maxar Technologies show that North Korea likely planned a broadside launch of the 5,000-ton destroyer, a method that splashes the ship sideways into the water.In one image, taken after the failed launch, the ship appears to be lying on its starboard side and still partially stuck on the ramp; the superstructure that is its highest point can be seen lying to the left of the hull, resting in or near the water. Much of the vessel's frame seems obscured by blue fabric. The aerial image below reveals the line of the normally level aft flight deck fully on its side, at far right. Choe Hyon was reportedly North Korea's largest warship to date. Airbus The weight of the bow section on the pier may be pinning the destroyer in an exposed position and would be exacerbated by any internal flooding likely on the stern. These internal spaces would need to be de-watered before a heavy-lift crane has a chance to lift the 5,000-ton vessel.Lee Sung-jun, a spokesperson for South Korea's Joint Chiefs of Staff, told reporters on Thursday that Seoul also assessed the ship to be partially submerged. Seawater can corrode and short-circuit electronic systems and rust exposed metal, necessitating expensive and time-consuming repairs once it's removed.State media wrote that the launch mechanism malfunctioned, causing the stern to slide into the water while the bow remained stuck on land.After watching the error, an irate Kim was quoted by state media as criticizing the officials involved in the launch, saying they were censured and that their mistakes would be "dealt with" at a party committee meeting next month. This image, taken on May 18, shows the naval destroyer before it was damaged. Satellite image ©2025 Maxar Technologies The North Korean leader further called the bungled launch a "serious accident and criminal act," adding that it had "brought the dignity and self-respect of our state to a collapse in a moment."South Korean officials told reporters on Thursday that it's likely the destroyer is in the same class as the Choe Hyon, a 5,000-ton vessel that it launched from a separate shipyard in April.Analysts and top North Korea watchers have assessed that the Choe Hyon is the country's largest warship to date.Satellite images from early last month showed what experts said was likely the "fitting out" process of the ship, during which internal construction is completed and equipment is installed before the warship is handed over to North Korea's navy. Then, in late April, North Korea unveiled the vessel during a ceremony at Nampo port. A ship is launched once it's watertight and all of its major components are installed.The only upside for North Korea is that during a ship launch likely no crewmembers would be aboard.The Choe Hyon has been identified as a guided missile frigate and reportedly one of two in the class that are under construction. Some analysts suggested the warship looked capable of carrying a vertical launch system, an upgrade for North Korea's naval capabilities that allows the warship to carry a larger arsenal South Korean TV shows the new frigate Choe Hyun at a launch ceremony at a North Korean shipyard in April 2025. Kim Jae-Hwan/SOPA Images/LightRocket via Getty Images The Choe Hyon is just one example of Pyongyang's naval modernization efforts. It's been a top priority under Kim along with a broader military buildup. Much of that focus has been on the submarine force; North Korea unveiled a new missile submarine two years ago.North Korea's navy is considered "primarily a coastal force" per a 2021 US Defense Intelligence Agency report, consisting of about 60,000 personnel, 400 patrol ships, 70 diesel-electric submarines, and 260 amphibious landing craft. The country faces insufficient resources in its shipbuilding industry, a major challenge towards its naval modernization efforts.While Choe Hyon appeared to be a sophisticated vessel, experts were waiting until its launch to observe potential capabilities and technologies.

not enough Paris Agreement target won’t protect polar ice sheets, scientists warn Calls for a more ambitious climate goal are rising as Earth hits several tipping points. Bob Berwyn, Inside Climate News – May 21, 2025 11:35 am | 21 A slurry mix of sand and seawater is pumped via barge onto the main public beach during a sand replenishment project along eroding shoreline on November 21, 2024, in San Clemente, California. Credit: Mario Tama / Getty Images A slurry mix of sand and seawater is pumped via barge onto the main public beach during a sand replenishment project along eroding shoreline on November 21, 2024, in San Clemente, California. Credit: Mario Tama / Getty Images Story text Size Small Standard Large Width * Standard Wide Links Standard Orange * Subscribers only   Learn more This article originally appeared on Inside Climate News, a nonprofit, nonpartisan news organization that covers climate, energy, and the environment. Sign up for their newsletter here. Sea levels in some parts of the world could be rising by as much as 8 to 12 inches per decade within the lifetime of today’s youngest generations, outpacing the ability of many coastal communities to adapt, scientists warned in a new study published this week. The research by an international team of sea level and polar ice experts suggests that limiting warming to 2.7° Fahrenheit (1.5° Celsius) above the pre-industrial temperature—the Paris Climate Agreement’s target—isn’t low enough to prevent a worst-case meltdown of Earth’s polar ice sheets. A better target for maintaining a safe climate, at least for the long term, might be closer to 1.8° Fahrenheit, said Durham University geographer and glacier expert Chris Stokes, a co-author of the new paper. “There have been a couple of quite high-profile papers recently, including a synthesis in Nature looking at safe planetary boundaries,” he said. “They made the argument that 1° Celsius is a better goal. And a couple of other papers have come out suggesting that we need a stricter temperature limit or a long-term goal. And I think the evidence is building towards that.” It’s not a new argument, he said, noting that climate research predating the first Intergovernmental Panel on Climate Change report in 1990 already highlighted the high risks of more than 1° C of warming. “Those studies were saying, ‘We’re warming. We really don’t want to go past 1°. We really don’t want to exceed 350 parts per million of carbon dioxide,’” he said. “Because we know what could happen looking at past warm periods and at simple calculations of ice sheet mass balance. And, you know, 30 years later, 40 years later, here we are seeing the problem.” Scientific calls for a more ambitious long-term climate goal are rising just as Earth’s average global temperature has breached the Paris Agreement target of 1.5° C of warming over the pre-industrial level nearly every consecutive month for the past two years. Atmospheric carbon dioxide has reached a concentration of 430 ppm, a 50 percent increase over pre-industrial levels. But missing those goals doesn’t diminish the importance of potentially revising the target, for which the Paris Agreement includes a review mechanism, Stokes said. Even if the global temperature overshoots the 1.5° mark, it’s important to know for the long term how much it would have to be lowered to return to a safe climate range. The new study focused on how melting polar ice masses drives sea level rise by combining evidence from past warm periods that were similar to the present, measurements of how much ice is being lost under the present level of warming, and projections of how much ice would be lost at different warming levels over the next few centuries. Sea level rise of several inches per decade would likely overwhelm adaptation efforts by many coastal communities in the US, said co-author Andrea Dutton, a geoscientist and sea level expert at the University of Wisconsin-Madison. “Coastal communities that are adapting to and preparing for future sea level rise are largely adapting to the amount of sea level rise that has already occurred,” she said. In a best-case scenario, she added, they are preparing for sea level rise at the current rate of a few millimeters per year, while the research suggests that rate will double within decades. The last time atmospheric carbon dioxide was at a concentration similar to now was in the mid-Pliocene warm period, just over 3 million years ago, when average global sea level rose 35 to 70 feet higher than today over the course of thousands of years. But the current rate of warming is far faster than any other time identified in the geological record. How the ice sheets will respond to warming at that speed is not clear, but nearly every new study in the past few decades has shown changes in the Arctic happening faster than expected. The United States’ ability to prepare for sea level rise is also profoundly threatened by the cuts to federal science agencies and staffing, Dutton said. The current cuts to science research, the retraction of funds already promised to communities through the Inflation Reduction Act of 2022, the abandonment of the congressionally mandated National Climate Assessment, and changes to federal rules on air pollution “collectively threaten our ability to project future sea level rise, to prepare our communities, and to mitigate climate change and stem the rate at which sea-level is rising,” she said via email. Many researchers are working closely with coastal communities, but as federal grants continue to get cut, these collaborations will founder, she added. “The ice sheets won’t care what different political parties ‘believe’ about climate change,” she said. “Like it or not, they are simply at the mercy of rising temperatures.” The mass of ice lost from the polar ice sheets has quadrupled since the 1990s, and they are currently losing around 370 billion metric tons of ice per year, said co-author Jonathan Bamber, a physicist at the University of Bristol who focuses on studying how Earth’s frozen regions interact with the rest of the climate system. “We switched on some new technology 30 years ago, and we discovered that the ice sheets are responding with a large amplitude and rather rapidly,” he said. The extent of the changes to the ice sheet are much greater than models had ever suggested they would be, he noted. “That was a bit of a shock for the whole community.” Most of the climate models of the past three decades projected only about half as much melting as has actually been observed during that time, he said. That suggests the “safe operating zone for humanity is about 350 ppm” of atmospheric carbon dioxide, corresponding to about 1° C of warming. “I think we’ve known for a long time that we’re interfering with the climate system in a very dangerous way,” he said. “And one of the points of our paper is to demonstrate that one part of the climate system, the ice sheets, are showing some very disturbing signals right now.” Some of the most vulnerable places are far from any melting ice sheets, including Belize City, home to about 65,000 people, where just 3 feet of sea level rise would swamp 500 square miles of land. In some low-lying tropical regions around the equator, sea level is rising three times as fast as the global average. That’s because the water is expanding as it warms, and as the ice sheets melt, their gravitational pull is reduced, allowing more water to flow away from the poles toward the equator. “At low latitudes, it goes up more than the average,” Bamber said. “It’s bad news for places like Bangladesh, India, Vietnam, and the Nile Delta.” Global policymakers need to be more aware of the effects of a 1.5° C temperature increase, Ambassador Carlos Fuller, long-time climate negotiator for Belize, said of the new study. Belize already moved its capital inland, but its largest city will be inundated at just 1 meter of sea-level rise, he said. “Findings such as these only sharpen the need to remain within the 1.5° Paris Agreement limit, or as close as possible, so we can return to lower temperatures and protect our coastal cities,” Fuller said. While the new study is focused on ice sheets, Durham University’s Stokes notes that recent research shows other parts of the Earth system are already at, or very near, tipping points that are irreversible on a timescale relevant to human civilizations. That includes changes to freshwater systems and ocean acidification. “I think somebody used the analogy that it’s like you’re wandering around in a dark room,” he said. “You know there’s a monster there, but you don’t know when you’re going to encounter it. It’s a little bit like that with these tipping points. We don’t know exactly where they are. We may have even crossed them, and we do know that we will hit them if we keep warming.” Bob Berwyn, Inside Climate News 21 Comments