¿Y si pudiéramos convertir el agua en un paisaje? Físicos de la Universidad de Lieja, en Bélgica, en colaboración la Universidad Brown (EE.UU.), lo han logrado. A partir de espinas milimétricas impresas en 3D, consiguieron manipular la superficie del

There are some great options too, from Tomb Raider to Saints Row.

Even those with the blackest thumbs can become master gardeners—as long as they’re willing to shell out for a subscription.

Bienvenidos a una nueva entrega del 3DExpress, el espacio en que les compartimos noticias rápidas y variadas del mundo de la impresión 3D. Comenzamos con hito médico. El primer trasplante de fémur completo impreso en 3D realizado a un niño…

Researchers unexpectedly discovered toxic airborne pollutants in Oklahoma. The image above depicts a field in Oklahoma. Credit: Shutterstock University of Colorado Boulder researchers made the first-ever airborne detection of Medium Chain Chlorinated Paraffins (MCCPs) in the Western Hemisphere. Sometimes, scientific research feels a lot like solving a mystery. Scientists head into the field with a clear goal and a solid hypothesis, but then the data reveals something surprising. That’s when the real detective work begins. This is exactly what happened to a team from the University of Colorado Boulder during a recent field study in rural Oklahoma. They were using a state-of-the-art instrument to track how tiny particles form and grow in the air. But instead of just collecting expected data, they uncovered something completely new: the first-ever airborne detection of Medium Chain Chlorinated Paraffins (MCCPs), a kind of toxic organic pollutant, in the Western Hemisphere. The teams findings were published in ACS Environmental Au. “It’s very exciting as a scientist to find something unexpected like this that we weren’t looking for,” said Daniel Katz, CU Boulder chemistry PhD student and lead author of the study. “We’re starting to learn more about this toxic, organic pollutant that we know is out there, and which we need to understand better.” MCCPs are currently under consideration for regulation by the Stockholm Convention, a global treaty to protect human health from long-standing and widespread chemicals. While the toxic pollutants have been measured in Antarctica and Asia, researchers haven’t been sure how to document them in the Western Hemisphere’s atmosphere until now. From Wastewater to Farmlands MCCPs are used in fluids for metal working and in the construction of PVC and textiles. They are often found in wastewater and as a result, can end up in biosolid fertilizer, also called sewage sludge, which is created when liquid is removed from wastewater in a treatment plant. In Oklahoma, researchers suspect the MCCPs they identified came from biosolid fertilizer in the fields near where they set up their instrument. “When sewage sludges are spread across the fields, those toxic compounds could be released into the air,” Katz said. “We can’t show directly that that’s happening, but we think it’s a reasonable way that they could be winding up in the air. Sewage sludge fertilizers have been shown to release similar compounds.” MCCPs little cousins, Short Chain Chlorinated Paraffins (SCCPs), are currently regulated by the Stockholm Convention, and since 2009, by the EPA here in the United States. Regulation came after studies found the toxic pollutants, which travel far and last a long time in the atmosphere, were harmful to human health. But researchers hypothesize that the regulation of SCCPs may have increased MCCPs in the environment. “We always have these unintended consequences of regulation, where you regulate something, and then there’s still a need for the products that those were in,” said Ellie Browne, CU Boulder chemistry professor, CIRES Fellow, and co-author of the study. “So they get replaced by something.” Measurement of aerosols led to a new and surprising discovery Using a nitrate chemical ionization mass spectrometer, which allows scientists to identify chemical compounds in the air, the team measured air at the agricultural site 24 hours a day for one month. As Katz cataloged the data, he documented the different isotopic patterns in the compounds. The compounds measured by the team had distinct patterns, and he noticed new patterns that he immediately identified as different from the known chemical compounds. With some additional research, he identified them as chlorinated paraffins found in MCCPs. Katz says the makeup of MCCPs are similar to PFAS, long-lasting toxic chemicals that break down slowly over time. Known as “forever chemicals,” their presence in soils recently led the Oklahoma Senate to ban biosolid fertilizer. Now that researchers know how to measure MCCPs, the next step might be to measure the pollutants at different times throughout the year to understand how levels change each season. Many unknowns surrounding MCCPs remain, and there’s much more to learn about their environmental impacts. “We identified them, but we still don’t know exactly what they do when they are in the atmosphere, and they need to be investigated further,” Katz said. “I think it’s important that we continue to have governmental agencies that are capable of evaluating the science and regulating these chemicals as necessary for public health and safety.” Reference: “Real-Time Measurements of Gas-Phase Medium-Chain Chlorinated Paraffins Reveal Daily Changes in Gas-Particle Partitioning Controlled by Ambient Temperature” by Daniel John Katz, Bri Dobson, Mitchell Alton, Harald Stark, Douglas R. Worsnop, Manjula R. Canagaratna and Eleanor C. Browne, 5 June 2025, ACS Environmental Au. DOI: 10.1021/acsenvironau.5c00038 Never miss a breakthrough: Join the SciTechDaily newsletter.

June 13, 20256 min readAir-Conditioning Can Surprisingly Help the Power Grid during Extreme HeatSwitching on air-conditioning during extreme heat doesn’t have to make us feel guilty—it can actually boost power grid reliability and help bring more renewable energy onlineBy Johanna Mathieu & The Conversation US Imagedepotpro/Getty ImagesThe following essay is reprinted with permission from The Conversation, an online publication covering the latest research.As summer arrives, people are turning on air conditioners in most of the U.S. But if you’re like me, you always feel a little guilty about that. Past generations managed without air conditioning – do I really need it? And how bad is it to use all this electricity for cooling in a warming world?If I leave my air conditioner off, I get too hot. But if everyone turns on their air conditioner at the same time, electricity demand spikes, which can force power grid operators to activate some of the most expensive, and dirtiest, power plants. Sometimes those spikes can ask too much of the grid and lead to brownouts or blackouts.On supporting science journalismIf you're enjoying this article, consider supporting our award-winning journalism by subscribing. By purchasing a subscription you are helping to ensure the future of impactful stories about the discoveries and ideas shaping our world today.Research I recently published with a team of scholars makes me feel a little better, though. We have found that it is possible to coordinate the operation of large numbers of home air-conditioning units, balancing supply and demand on the power grid – and without making people endure high temperatures inside their homes.Studies along these lines, using remote control of air conditioners to support the grid, have for many years explored theoretical possibilities like this. However, few approaches have been demonstrated in practice and never for such a high-value application and at this scale. The system we developed not only demonstrated the ability to balance the grid on timescales of seconds, but also proved it was possible to do so without affecting residents’ comfort.The benefits include increasing the reliability of the power grid, which makes it easier for the grid to accept more renewable energy. Our goal is to turn air conditioners from a challenge for the power grid into an asset, supporting a shift away from fossil fuels toward cleaner energy.Adjustable equipmentMy research focuses on batteries, solar panels and electric equipment – such as electric vehicles, water heaters, air conditioners and heat pumps – that can adjust itself to consume different amounts of energy at different times.Originally, the U.S. electric grid was built to transport electricity from large power plants to customers’ homes and businesses. And originally, power plants were large, centralized operations that burned coal or natural gas, or harvested energy from nuclear reactions. These plants were typically always available and could adjust how much power they generated in response to customer demand, so the grid would be balanced between power coming in from producers and being used by consumers.But the grid has changed. There are more renewable energy sources, from which power isn’t always available – like solar panels at night or wind turbines on calm days. And there are the devices and equipment I study. These newer options, called “distributed energy resources,” generate or store energy near where consumers need it – or adjust how much energy they’re using in real time.One aspect of the grid hasn’t changed, though: There’s not much storage built into the system. So every time you turn on a light, for a moment there’s not enough electricity to supply everything that wants it right then: The grid needs a power producer to generate a little more power. And when you turn off a light, there’s a little too much: A power producer needs to ramp down.The way power plants know what real-time power adjustments are needed is by closely monitoring the grid frequency. The goal is to provide electricity at a constant frequency – 60 hertz – at all times. If more power is needed than is being produced, the frequency drops and a power plant boosts output. If there’s too much power being produced, the frequency rises and a power plant slows production a little. These actions, a process called “frequency regulation,” happen in a matter of seconds to keep the grid balanced.This output flexibility, primarily from power plants, is key to keeping the lights on for everyone.Finding new optionsI’m interested in how distributed energy resources can improve flexibility in the grid. They can release more energy, or consume less, to respond to the changing supply or demand, and help balance the grid, ensuring the frequency remains near 60 hertz.Some people fear that doing so might be invasive, giving someone outside your home the ability to control your battery or air conditioner. Therefore, we wanted to see if we could help balance the grid with frequency regulation using home air-conditioning units rather than power plants – without affecting how residents use their appliances or how comfortable they are in their homes.From 2019 to 2023, my group at the University of Michigan tried this approach, in collaboration with researchers at Pecan Street Inc., Los Alamos National Laboratory and the University of California, Berkeley, with funding from the U.S. Department of Energy Advanced Research Projects Agency-Energy.We recruited 100 homeowners in Austin, Texas, to do a real-world test of our system. All the homes had whole-house forced-air cooling systems, which we connected to custom control boards and sensors the owners allowed us to install in their homes. This equipment let us send instructions to the air-conditioning units based on the frequency of the grid.Before I explain how the system worked, I first need to explain how thermostats work. When people set thermostats, they pick a temperature, and the thermostat switches the air-conditioning compressor on and off to maintain the air temperature within a small range around that set point. If the temperature is set at 68 degrees, the thermostat turns the AC on when the temperature is, say, 70, and turns it off when it’s cooled down to, say, 66.Every few seconds, our system slightly changed the timing of air-conditioning compressor switching for some of the 100 air conditioners, causing the units’ aggregate power consumption to change. In this way, our small group of home air conditioners reacted to grid changes the way a power plant would – using more or less energy to balance the grid and keep the frequency near 60 hertz.Moreover, our system was designed to keep home temperatures within the same small temperature range around the set point.Testing the approachWe ran our system in four tests, each lasting one hour. We found two encouraging results.First, the air conditioners were able to provide frequency regulation at least as accurately as a traditional power plant. Therefore, we showed that air conditioners could play a significant role in increasing grid flexibility. But perhaps more importantly – at least in terms of encouraging people to participate in these types of systems – we found that we were able to do so without affecting people’s comfort in their homes.We found that home temperatures did not deviate more than 1.6 Fahrenheit from their set point. Homeowners were allowed to override the controls if they got uncomfortable, but most didn’t. For most tests, we received zero override requests. In the worst case, we received override requests from two of the 100 homes in our test.In practice, this sort of technology could be added to commercially available internet-connected thermostats. In exchange for credits on their energy bills, users could choose to join a service run by the thermostat company, their utility provider or some other third party.Then people could turn on the air conditioning in the summer heat without that pang of guilt, knowing they were helping to make the grid more reliable and more capable of accommodating renewable energy sources – without sacrificing their own comfort in the process.This article was originally published on The Conversation. Read the original article.

html PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" "http://www.w3.org/TR/REC-html40/loose.dtd" 19 shortlisted projects for the 2025 Award cycle were revealed by the Aga Khan Award for Architecture (AKAA). A portion of the $1 million prize, one of the biggest in architecture, will be awarded to the winning proposals. Out of the 369 projects nominated for the 16th Award Cycle (2023-2025), an independent Master Jury chose the 19 shortlisted projects from 15 countries.The nine members of the Master Jury for the 16th Award cycle include Azra Akšamija, Noura Al-Sayeh Holtrop, Lucia Allais, David Basulto, Yvonne Farrell, Kabage Karanja, Yacouba Konaté, Hassan Radoine, and Mun Summ Wong.His Late Highness Prince Karim Aga Khan IV created the Aga Khan Award for Architecture in 1977 to recognize and promote architectural ideas that effectively meet the needs and goals of communities where Muslims are a major population. Nearly 10,000 construction projects have been documented since the award's inception 48 years ago, and 128 projects have been granted it. The AKAA's selection method places a strong emphasis on architecture that stimulates and responds to people's cultural ambitions in addition to meeting their physical, social, and economic demands.The Aga Khan Award for Architecture is governed by a Steering Committee chaired by His Highness the Aga Khan. The other members of the Steering Committee are Meisa Batayneh, Principal Architect, Founder, maisam architects and engineers, Amman, Jordan; Souleymane Bachir Diagne, Professor of Philosophy and Francophone Studies, Columbia University, New York, United States of America; Lesley Lokko, Founder & Director, African Futures Institute, Accra, Ghana; Gülru Necipoğlu, Director and Professor, Aga Khan Program for Islamic Architecture, Harvard University, Cambridge, United States of America; Hashim Sarkis, Founder & Principal, Hashim Sarkis Studios (HSS); Dean, School of Architecture and Planning, Massachusetts Institute of Technology, Cambridge, United States of America; and Sarah M. Whiting, Partner, WW Architecture; Dean and Josep Lluís Sert Professor of Architecture, Graduate School of Design, Harvard University, Cambridge, United States of America. Farrokh Derakhshani is the Director of the Award.Examples of outstanding architecture in the areas of modern design, social housing, community development and enhancement, historic preservation, reuse and area conservation, landscape design, and environmental enhancement are recognized by the Aga Khan Award for Architecture.Building plans that creatively utilize local resources and relevant technologies, as well as initiatives that could spur such initiatives abroad, are given special consideration. It should be mentioned that in addition to honoring architects, the Award also recognizes towns, builders, clients, master craftspeople, and engineers who have contributed significantly to the project.Projects had to be completed between January 1, 2018, and December 31, 2023, and they had to have been operational for a minimum of one year in order to be eligible for consideration in the 2025 Award cycle. The Award is not available for projects that His Highness the Aga Khan or any of the Aga Khan Development Network (AKDN) institutions have commissioned.See the 19 shortlisted projects with their short project descriptions competing for the 2025 Award Cycle:Khudi Bari. Image © Aga Khan Trust for Culture / City Syntax (F. M. Faruque Abdullah Shawon, H. M. Fozla Rabby Apurbo)BangladeshKhudi Bari, in various locations, by Marina Tabassum ArchitectsMarina Tabassum Architects' Khudi Bari, which can be readily disassembled and reassembled to suit the needs of the users, is a replicable solution for displaced communities impacted by geographic and climatic changes.West Wusutu Village Community Centre. Image © Aga Khan Trust for Culture / Dou Yujun (photographer)ChinaWest Wusutu Village Community Centre, Hohhot, Inner Mongolia, by Zhang PengjuIn addition to meeting the religious demands of the local Hui Muslims, Zhang Pengju's West Wusutu Village Community Centre in Hohhot, Inner Mongolia, offers social and cultural spaces for locals and artists. Constructed from recycled bricks, it features multipurpose indoor and outdoor areas that promote communal harmony.Revitalisation of Historic Esna. Image © Aga Khan Trust for Culture / Ahmed Salem (photographer)EgyptRevitalisation of Historic Esna, by Takween Integrated Community DevelopmentBy using physical interventions, socioeconomic projects, and creative urban planning techniques, Takween Integrated Community Development's Revitalization of Historic Esna tackles the issues of cultural tourism in Upper Egypt and turns the once-forgotten area around the Temple of Khnum into a thriving historic city.The Arc at Green School. Image © Aga Khan Trust for Culture / Andreas Perbowo Widityawan (photographer)IndonesiaThe Arc at Green School, in Bali, by IBUKU / Elora HardyAfter 15 years of bamboo experimenting at the Green School Bali, IBUKU/Elora Hardy created The Arc at Green School. The Arc is a brand-new community wellness facility built on the foundations of a temporary gym. High-precision engineering and regional handicraft are combined in this construction.Islamic Centre Nurul Yaqin Mosque. Image © Aga Khan Trust for Culture / Andreas Perbowo Widityawan (photographer)IndonesiaIslamic Centre Nurul Yaqin Mosque, in Palu, Central Sulawesi, by Dave Orlando and Fandy GunawanDave Orlando and Fandy Gunawan built the Islamic Center Nurul Yaqin Mosque in Palu, Central Sulawesi, on the location of a previous mosque that was damaged by a 2018 tsunami. There is a place for worship and assembly at the new Islamic Center. Surrounded by a shallow reflecting pool that may be drained to make room for more guests, it is open to the countryside.Microlibrary Warak Kayu. Image © Aga Khan Trust for Culture / Andreas Perbowo Widityawan (photographer)IndonesiaMicrolibraries in various cities, by SHAU / Daliana Suryawinata, Florian HeinzelmannFlorian Heinzelmann, the project's initiator, works with stakeholders at all levels to provide high-quality public spaces in a number of Indonesian parks and kampungs through microlibraries in different towns run by SHAU/Daliana Suryawinata. So far, six have been constructed, and by 2045, 100 are planned.Majara Residence. Image © Aga Khan Trust for Culture / Deed Studio (photographer)IranMajara Complex and Community Redevelopment, in Hormuz Island by ZAV Architects / Mohamadreza GhodousiThe Majara Complex and Community Redevelopment on Hormuz Island, designed by ZAV Architects and Mohamadreza Ghodousi, is well-known for its vibrant domes that offer eco-friendly lodging for visitors visiting Hormuz's distinctive scenery. In addition to providing new amenities for the islanders who visit to socialize, pray, or utilize the library, it was constructed by highly trained local laborers.Jahad Metro Plaza. Image © Aga Khan Trust for Culture / Deed Studio (photographer)IranJahad Metro Plaza in Tehran, by KA Architecture StudioKA Architecture Studio's Jahad Metro Plaza in Tehran was constructed to replace the dilapidated old buildings. It turned the location into a beloved pedestrian-friendly landmark. The arched vaults, which are covered in locally manufactured brick, vary in height to let air and light into the area they are protecting.Khan Jaljulia Restoration. Image © Aga Khan Trust for Culture / Mikaela Burstow (photographer)IsraelKhan Jaljulia Restoration in Jaljulia by Elias KhuriElias Khuri's Khan Jaljulia Restoration is a cost-effective intervention set amidst the remnants of a 14th-century Khan in Jaljulia. By converting the abandoned historical location into a bustling public area for social gatherings, it helps the locals rediscover their cultural history.Campus Startup Lions. Image © Aga Khan Trust for Culture / Christopher Wilton-Steer (photographer)KenyaCampus Startup Lions, in Turkana by Kéré ArchitectsKéré Architecture's Campus Startup Lions in Turkana is an educational and entrepreneurial center that offers a venue for community involvement, business incubation, and technology-driven education. The design incorporates solar energy, rainwater harvesting, and tall ventilation towers that resemble the nearby termite mounds, and it was constructed using local volcanic stone.Lalla Yeddouna Square. Image © Aga Khan Trust for Culture / Amine Houari (photographer)MoroccoRevitalisation of Lalla Yeddouna Square in the medina of Fez, by Mossessian Architecture and Yassir Khalil StudioMossessian Architecture and Yassir Khalil Studio's revitalization of Lalla Yeddouna Square in the Fez medina aims to improve pedestrian circulation and reestablish a connection to the waterfront. For the benefit of locals, craftspeople, and tourists from around the globe, existing buildings were maintained and new areas created.Vision Pakistan. Image © Aga Khan Trust for Culture / Usman Saqib Zuberi (photographer)PakistanVision Pakistan, in Islamabad by DB Studios / Mohammad Saifullah SiddiquiA tailoring training center run by Vision Pakistan, a nonprofit organization dedicated to empowering underprivileged adolescents, is located in Islamabad by DB Studios/Mohammad Saifullah Siddiqui. Situated in a crowded neighborhood, this multi-story building features flashy jaalis influenced by Arab and Pakistani crafts, echoing the city's 1960s design.Denso Hall Rahguzar Project. Image © Aga Khan Trust for Culture / Usman Saqib Zuberi (photographer)PakistanDenso Hall Rahguzar Project, in Karachi by Heritage Foundation Pakistan / Yasmeen LariThe Heritage Foundation of Pakistan/Yasmeen Lari's Denso Hall Rahguzar Project in Karachi is a heritage-led eco-urban enclave that was built with low-carbon materials in response to the city's severe climate, which is prone to heat waves and floods. The freshly planted "forests" are irrigated by the handcrafted terracotta cobbles, which absorb rainfall and cool and purify the air.Wonder Cabinet. Image © Aga Khan Trust for Culture / Mikaela Burstow (photographer)PalestineWonder Cabinet, in Bethlehem by AAU AnastasThe architects at AAU Anastas established Wonder Cabinet, a multifunctional, nonprofit exhibition and production venue in Bethlehem. The three-story concrete building was constructed with the help of regional contractors and artisans, and it is quickly emerging as a major center for learning, design, craft, and innovation.The Ned. Image © Aga Khan Trust for Culture / Cemal Emden (photographer)QatarThe Ned Hotel, in Doha by David Chipperfield ArchitectsThe Ministry of Interior was housed in the Ned Hotel in Doha, which was designed by David Chipperfield Architects. Its Middle Eastern brutalist building was meticulously transformed into a 90-room boutique hotel, thereby promoting architectural revitalization in the region.Shamalat Cultural Centre. Image © Aga Khan Trust for Culture / Hassan Al Shatti (photographer)Saudi ArabiaShamalat Cultural Centre, in Riyadh, by Syn Architects / Sara Alissa, Nojoud AlsudairiOn the outskirts of Diriyah, the Shamalat Cultural Centre in Riyadh was created by Syn Architects/Sara Alissa, Nojoud Alsudairi. It was created from an old mud home that artist Maha Malluh had renovated. The center, which aims to incorporate historic places into daily life, provides a sensitive viewpoint on heritage conservation in the area by contrasting the old and the contemporary.Rehabilitation and Extension of Dakar Railway Station. Image © Aga Khan Trust for Culture / Sylvain Cherkaoui (photographer)SenegalRehabilitation and Extension of Dakar Railway Station, in Dakar by Ga2DIn order to accommodate the passengers of a new express train line, Ga2D extended and renovated Dakar train Station, which purposefully contrasts the old and modern buildings. The forecourt was once again open to pedestrian traffic after vehicular traffic was limited to the rear of the property.Rami Library. Image © Aga Khan Trust for Culture / Cemal Emden (photographer)TürkiyeRami Library, by Han Tümertekin Design & ConsultancyThe largest library in Istanbul is the Rami Library, designed by Han Tümertekin Design & Consultancy. It occupied the former Rami Barracks, a sizable, single-story building with enormous volumes that was constructed in the eighteenth century. In order to accommodate new library operations while maintaining the structure's original spatial features, a minimal intervention method was used.Morocco Pavilion Expo Dubai 2020. Image © Aga Khan Trust for Culture / Deed Studio (photographer)United Arab EmiratesMorocco Pavilion Expo Dubai 2020, by Oualalou + ChoiOualalou + Choi's Morocco Pavilion Expo Dubai 2020 is intended to last beyond Expo 2020 and be transformed into a cultural center. The pavilion is a trailblazer in the development of large-scale rammed earth building techniques. Its use of passive cooling techniques, which minimize the need for mechanical air conditioning, earned it the gold LEED accreditation.At each project location, independent professionals such as architects, conservation specialists, planners, and structural engineers have conducted thorough evaluations of the nominated projects. This summer, the Master Jury convenes once more to analyze the on-site evaluations and choose the ultimate Award winners.The top image in the article: The Arc at Green School. Image © Aga Khan Trust for Culture / Andreas Perbowo Widityawan (photographer).> via Aga Khan Award for Architecture