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Heart-shaped mollusc has windows that work like fibre optics

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Tuesday, November 19, 2024

Heart cockles come in many colours and host photosynthetic algae inside their shellsDakota McCoy A heart-shaped mollusc has evolved tiny windows that work like fibre-optic cables, the first known example in nature. Heart cockles (Corculum cardissa) are bivalve molluscs a bit like clams that have a symbiotic relationship with photosynthetic algae that live inside them. The algae have a safe home, get light to photosynthesise and provide nutrients for their hosts. Unlike other bivalves, heart cockles don’t open their shells up wide, yet they somehow funnel light to their interior even while staying shut. Now, Dakota McCoy at the University of Chicago and her colleagues have found that there are transparent calcium carbonate crystal structures in the heart cockle shells that function like fibre-optic bundles, letting light inside to bathe the algae. “If you don’t have to open and can just have a transparent window, that’s a very safe way to irradiate your algae,” says McCoy. The researchers examined fragments of different heart cockle shells and the transparent structures within them, as well as the intensity and colour of light that gets through. They found that the windows were made from long, thin fibres of a mineral called aragonite – a form of calcium carbonate – which lets twice as much of the photosynthetically useful light through as it does harmful ultraviolet light. “We put on sunblock because UV causes mutations and cancer. The heart cockles are using these windows as a sunblock,” says McCoy. Heart cockle shells illuminated from within to show the transparent windows in their shells, which can be little triangles (left) or stripes (right)Dakota McCoy While the aragonite threads look similar to manufactured fibre optics, they lack a protective, insulating sheath, called cladding, yet transmit light just as effectively. This could serve as an inspiration for cladding-free fibre-optic cables, which would be cheaper to manufacture. The natural, UV-blocking properties of the shells could also be used to help protect corals, which, like the cockles, host photosynthetic algae inside them, but are more susceptible to environmental stresses like light and heat, says McCoy.

Tiny, solid windows in the shells of heart cockles let in light for the photosynthetic algae inside them – and they could show us how to make better fibre-optic cables

Heart cockles come in many colours and host photosynthetic algae inside their shells

Dakota McCoy

A heart-shaped mollusc has evolved tiny windows that work like fibre-optic cables, the first known example in nature.

Heart cockles (Corculum cardissa) are bivalve molluscs a bit like clams that have a symbiotic relationship with photosynthetic algae that live inside them. The algae have a safe home, get light to photosynthesise and provide nutrients for their hosts.

Unlike other bivalves, heart cockles don’t open their shells up wide, yet they somehow funnel light to their interior even while staying shut.

Now, Dakota McCoy at the University of Chicago and her colleagues have found that there are transparent calcium carbonate crystal structures in the heart cockle shells that function like fibre-optic bundles, letting light inside to bathe the algae. “If you don’t have to open and can just have a transparent window, that’s a very safe way to irradiate your algae,” says McCoy.

The researchers examined fragments of different heart cockle shells and the transparent structures within them, as well as the intensity and colour of light that gets through. They found that the windows were made from long, thin fibres of a mineral called aragonite – a form of calcium carbonate – which lets twice as much of the photosynthetically useful light through as it does harmful ultraviolet light. “We put on sunblock because UV causes mutations and cancer. The heart cockles are using these windows as a sunblock,” says McCoy.

Heart cockle shells illuminated from within to show the transparent windows in their shells, which can be little triangles (left) or stripes (right)

Dakota McCoy

While the aragonite threads look similar to manufactured fibre optics, they lack a protective, insulating sheath, called cladding, yet transmit light just as effectively. This could serve as an inspiration for cladding-free fibre-optic cables, which would be cheaper to manufacture.

The natural, UV-blocking properties of the shells could also be used to help protect corals, which, like the cockles, host photosynthetic algae inside them, but are more susceptible to environmental stresses like light and heat, says McCoy.

Read the full story here.
Photos courtesy of

How nature organizes itself, from brain cells to ecosystems

McGovern Institute researchers develop a mathematical model to help define how modularity occurs in the brain — and across nature.

Look around, and you’ll see it everywhere: the way trees form branches, the way cities divide into neighborhoods, the way the brain organizes into regions. Nature loves modularity — a limited number of self-contained units that combine in different ways to perform many functions. But how does this organization arise? Does it follow a detailed genetic blueprint, or can these structures emerge on their own?A new study from MIT Professor Ila Fiete suggests a surprising answer.In findings published Feb. 18 in Nature, Fiete, an associate investigator in the McGovern Institute for Brain Research and director of the K. Lisa Yang Integrative Computational Neuroscience (ICoN) Center at MIT, reports that a mathematical model called peak selection can explain how modules emerge without strict genetic instructions. Her team’s findings, which apply to brain systems and ecosystems, help explain how modularity occurs across nature, no matter the scale.Joining two big ideas“Scientists have debated how modular structures form. One hypothesis suggests that various genes are turned on at different locations to begin or end a structure. This explains how insect embryos develop body segments, with genes turning on or off at specific concentrations of a smooth chemical gradient in the insect egg,” says Fiete, who is the senior author of the paper. Mikail Khona PhD '25, a former graduate student and K. Lisa Yang ICoN Center graduate fellow, and postdoc Sarthak Chandra also led the study.Another idea, inspired by mathematician Alan Turing, suggests that a structure could emerge from competition — small-scale interactions can create repeating patterns, like the spots on a cheetah or the ripples in sand dunes.Both ideas work well in some cases, but fail in others. The new research suggests that nature need not pick one approach over the other. The authors propose a simple mathematical principle called peak selection, showing that when a smooth gradient is paired with local interactions that are competitive, modular structures emerge naturally. “In this way, biological systems can organize themselves into sharp modules without detailed top-down instruction,” says Chandra.Modular systems in the brainThe researchers tested their idea on grid cells, which play a critical role in spatial navigation as well as the storage of episodic memories. Grid cells fire in a repeating triangular pattern as animals move through space, but they don’t all work at the same scale — they are organized into distinct modules, each responsible for mapping space at slightly different resolutions.No one knows how these modules form, but Fiete’s model shows that gradual variations in cellular properties along one dimension in the brain, combined with local neural interactions, could explain the entire structure. The grid cells naturally sort themselves into distinct groups with clear boundaries, without external maps or genetic programs telling them where to go. “Our work explains how grid cell modules could emerge. The explanation tips the balance toward the possibility of self-organization. It predicts that there might be no gene or intrinsic cell property that jumps when the grid cell scale jumps to another module,” notes Khona.Modular systems in natureThe same principle applies beyond neuroscience. Imagine a landscape where temperatures and rainfall vary gradually over a space. You might expect species to be spread, and also to vary, smoothly over this region. But in reality, ecosystems often form species clusters with sharp boundaries — distinct ecological “neighborhoods” that don’t overlap.Fiete’s study suggests why: local competition, cooperation, and predation between species interact with the global environmental gradients to create natural separations, even when the underlying conditions change gradually. This phenomenon can be explained using peak selection — and suggests that the same principle that shapes brain circuits could also be at play in forests and oceans.A self-organizing worldOne of the researchers’ most striking findings is that modularity in these systems is remarkably robust. Change the size of the system, and the number of modules stays the same — they just scale up or down. That means a mouse brain and a human brain could use the same fundamental rules to form their navigation circuits, just at different sizes.The model also makes testable predictions. If it’s correct, grid cell modules should follow simple spacing ratios. In ecosystems, species distributions should form distinct clusters even without sharp environmental shifts.Fiete notes that their work adds another conceptual framework to biology. “Peak selection can inform future experiments, not only in grid cell research but across developmental biology.”

From polar bears to polar vortex: How Columbia Sportswear uses nature to protect us from it

I’m standing on a corner in Reykjavík, the most flagrantly fragrantly delicious cinnamon roll I have ever had in my hand, and I am pouring sweat. It’s not because I worked hard to get this blissful brauð; it’s a leisurely 10-minute walk from my hotel. It’s not because it’s unseasonably warm; it’s Iceland in late […] The post From polar bears to polar vortex: How Columbia Sportswear uses nature to protect us from it appeared first on Popular Science.

I’m standing on a corner in Reykjavík, the most flagrantly fragrantly delicious cinnamon roll I have ever had in my hand, and I am pouring sweat. It’s not because I worked hard to get this blissful brauð; it’s a leisurely 10-minute walk from my hotel. It’s not because it’s unseasonably warm; it’s Iceland in late September and a brisk 40 degrees Fahrenheit. It’s because I’m wearing Columbia Sportswear Omni-Heat Infinity baselayers, and I have underestimated their insulating capacities—a mistake I will not make twice. It’s a mistake I shouldn’t have made at all. I spent several days prior testing out breathable membranes and thermal-reflective tech. Columbia’s gold metallic foil—introduced in 2021—helped insulate Intuitive Machines’ lunar lander when it was sent to the actual Moon in February 2024 (and when it launched again in 2025). In space, nobody can hear you sweat, but I’m walking through landscapes that only resemble Mars. And I’m audibly panting. I’ve trudged across the Solheimajokull glacier and been told that Omni-Heat Infinity would be a bit extra for those circumstances, so why I thought I needed it for a casual city stroll, well, I’m feeling the heat from that … I’m taking the heat for that. I packed Omni-Heat Infinity in case temperatures plunged below freezing. I should have stuck with what I’m actually in Iceland to learn about: Omni-Heat Arctic, Columbia Sportswear’s latest insulation system developed through research on polar bear pelts and demonstrated on less carb-focused, more high-output adventures. And what better place to test fabrics than where weather is constantly in flux. Iceland is a land of layers—both wandered and worn. On the Mid-Atlantic Ridge, where the Eurasian and North American plates slowly separate, the country is resigned to be redesigned as the Earth shifts and strains. But because a place is cold doesn’t mean it is unkind. A close-knit society on an unraveling rock, the Iceland I experience is a warm, self-reliant culture that demands warm, resilient clothes. I’ve only been in the country a few hours before I see a new road being freshly graded on top of what looks like last week’s lava. I’ve only been in the country a few more hours before it rains, shines, pours, and then the clouds part. Over the course of one day I’ll be doused winding behind the wind-whipped waterfalls, snake between surging sneaker waves, then scramble up the ashy veins of ice ridges. For every hour that’s brooding and bleak along the black sand coastline, there will be one that’s calm and bright beside thermal rivers. Hiking through the Reykjadalur Valley, we meet Skylar, who is backpacking solo through Europe and proudly shows off his one constant companion: a Columbia Sportswear flannel. Tranquility. Volatility. “If you don’t like the weather, wait five minutes” is a fitting expression and apt alert that you should always approach travel in Iceland with all manner of apparel handy. It’s a saying you’re just as likely to hear in Beaverton, Oregon, home to the Columbia Sportswear Company. Field-testing in Iceland is a first for our host, Director of Communications Andy Nordhoff, but this type of terrain isn’t foreign. Oregon may not be constantly altered by tectonic tension the way Iceland is, but it’s no stranger to maritime influences and geothermal forces. It’s a dramatic backdrop shaped by the slow grind of time and upheaval—weathered smooth in places, rough in others. It’s a landscape that has shaped Columbia since the company was formed in 1938. What started as a hat company is now one tough mother of an outfitter producing apparel and accessories for challenging environments.   And if there’s one thing folks from Oregon and Iceland know, it’s that there’s nothing worse than standing in a coat that has you remembering rather than feeling what it’s like to be warm or dry. To be present in adventures, you can’t be worrying about your clothes. A majority of activities in Iceland—from exploratory tourism to olfactory art collectives—are anchored in cultural reverence for natural resources and capturing the rejuvenating aura of the outdoors. And in a way, that’s the concept behind Omni-Heat Arctic, a solar-capture system. But before I found myself wrapped up in a fleece appreciating untamed beauty, Columbia’s in-house scientists spent years wrapped up in how nature solved the problem of thriving at extremes. Speaking from the Columbia campus, Dr. Haskell Beckham, vice president of innovation, explains how the company set out to “have the warmest jacket without the weight of a giant, damp puffer.” A puffer is, in the most basic terms, a bunch of chopped-up material stuffed in fabric. There’s down, there’s synthetic insulation, but it’s no matter what it’s operating with trapped air, which is low thermal conductivity. Still, humans constantly radiate heat, so the silver metallic Omni-Heat lining was introduced in 2010 to block that loss and reflect it back. Fast forward to 2021, and Omni-Heat Infinity introduced more surface coverage without impacting breathability, now with gold dots to tell the difference. Either way, they stood up to accelerated abrasion testing and real-world comfort testimonials. Plus the off-world partnerships with Intuitive Machines, who spoke the same language of thermal emissivity and solar reflectivity. So, having successfully applied materials science to space, the Columbia lab started thinking about icons of the most extreme environments on Earth. And Arctic inhabitants quickly came up. Digging into scientific literature about polar bears, however, revealed gaps in the understanding of how they survive. So Beckham knew he had to get his hands on a polar bear pelt. After trying the Oregon Zoo, Beckham followed a suggestion to contact the Burke Museum of Natural History at the University of Washington in Seattle. It turned out they did have a pelt that he could check out, like a library book, and he brought it back to the Portland area where it was studied for a year—placed in environmental chambers to measure how it reacted under a solar simulator at various watts per meter squared to mimic what it might see in a cold, yet sunny environment. And that’s when the Columbia team was able to shine some light on how polar pelts absorb light. “We discovered that the fur itself is actually translucent, but not transparent,” explains Beckham. “This lets a degree of solar energy transmission through the fur. And the bear’s skin is pigmented, which helps convert solar energy into heat—just like a black T-shirt in a warm environment feels warmer than a white T-shirt, which reflects solar radiation. With this system the pelt harvested solar energy and converts it to heat, so we set about creating materials and material stacks that have the same effect, which is partially about color and partially about density.” The end result, Omni-Heat Arctic, applies this discovery with thinner outer layers that allow sunlight to penetrate to the insulation (the equivalent of the underfur) and be converted closer to the body. However, unbroken black fabrics wouldn’t work, as the heat collects at the surface and is lost to the environment. It was imperative the solar radiation bypass the shell, go through the insulation, and be absorbed in a lining. For the Arctic Crest Down Jacket, the Columbia lab finally settled on a lining patterned with triangles and dots. Multi-layered engineering allowed the material to have a layer of metal topped with a coating featuring a black pigment. That black coating absorbs the solar radiation and converts it to heat, which is then conducted toward the body, while also protecting that heat from dissipating into the cold. And the team knew they nailed it when beta testers made unprompted comments about how it felt like the warmth amplified after the sun comes out, despite the external temperature.        “It’s a solar-boosted heat … like a biological greenhouse effect,” says Beckham. “That’s why the pattern on the puffer resembles a geodesic dome. On top of that, it’s a warmer jacket even when there’s no sunshine, thanks to how we engineer materials. “The fleece works a bit differently since they don’t have that special low E [low emissivity] coating, but [the high pile and black yarn lining] do work in that way a pelt naturally works.” As straightforward as all that sounds, Beckham’s research produced insight that challenged conventional wisdom, showing it’s not as simple as sunlight transferred through fur onto skin equals warmth. The fur density varies across the pelt, and as little as 3.5 percent of the light sometimes reaches the skin. So, an open question still remains about why the polar bear’s skin is black and what part it versus the fur truly plays in thermal regulation.  This, in a way, makes Omni-Heart Arctic an evolution, even an improvement on the natural means of solar transference. Confirmed by heat flux sensors, control of insulation, shell fabric/coating, lining, and moisture-resistant overlays allowed for garments with up to three times heat retention plus performance-oriented attributes. Core areas needing thicker covering and other areas needing flexibility and breathability can be targeted, while selectively absorbing sunlight promotes warmth without harmful exposure to UV.  Before this trip, my perspective on polar bears boiled down to “If it’s brown, lay down; if it’s black, fight back; if it’s white, say goodnight.” Now, I can appreciate what these creatures and Columbia Sportswear have done to address my mammalian shortcomings. Of course, when you think of a polar bear soaking up the Arctic sun, there’s a good chance you imagine it’s floating on an iceberg. While we didn’t go that far to test our textiles, we did take a sizable amount of moisture into consideration.  The Seljalandsfoss and Skogafoss waterfalls feel like veils between worlds—permeable but formidable. Piercing the multiverse requires preparation, however, and Columbia made sure we were ready with the OutDry Extreme Wyldwood shell jacket and pants. Thrown over the zip-up fleece, OutDry Extreme provided an impervious barrier without forming a moist bubble. With the hydrophobic film-like membrane laminated on the exterior (as opposed to the interior, topped by DWR-coated fabric), I didn’t worry about wet out or wet within. This orientation enhances breathability, allowing the interior fabric to wick perspiration away and more evenly distribute moisture vapor movement so no area gets overloaded. And as someone who constantly runs hot, I can vouch for its effectiveness. The Konos TRS OutDry Mid shoe kept my feet equally dry, stable, and cushioned throughout trail and town (and they remain my rainy day sneaker boots). Having a successful solution doesn’t mean Beckham and his team aren’t looking at new bio-inspired emulations that can improve outdoor apparel, however. The water-repellent properties of the lotus leaf are of interest, as the plant’s microstructure enables water droplets to bead up and roll off effortlessly. This could lead to durable, chemical-free, water-resistant gear. And the structural color of butterfly wings, where microscopic structures rather than pigments create hues, could lead to vivid, long-lasting color without dyes—another sustainable solution. From the 3D printers and swatch prototypes in their fab lab to the computational modeling that allows them to go through infinite combinations of inspirations and materials, the Columbia Sportswear scientists pursue innovation and efficiency.   I’ve now lived in the Arctic Crest Down Jacket and Arctic Crest Sherpa Fleece from one shoulder season to the next, trudging through the most brutally cold winter in a decade. Soon, it will be time to hang them up in favor of windbreakers and lightweight rain shells. In the not-so-distant future, Columbia Sportswear will have cooling technologies to reveal. But the polar vortex surged southward again as I started outlining this piece. Despite the spring-like weather that followed, early-morning hiking and biking isn’t exactly balmy yet. And there are always new latitudes to explore with the right daypack. So, as long as there’s even a hint of crispness or clouds in the years to come, I’m happy to bundle up in biomimicry to help me grin and, well, bear it, warm as a fresh cinnamon roll. The post From polar bears to polar vortex: How Columbia Sportswear uses nature to protect us from it appeared first on Popular Science.

Even Ground Squirrels Got In on the Vole Feast Last Summer

For the first time, scientists documented concerted carnivory by California ground squirrels. But why were there so many voles? The post Even Ground Squirrels Got In on the Vole Feast Last Summer appeared first on Bay Nature.

By last summer, University of Wisconsin–Eau Claire professor Jennifer Elaine Smith had been studying California ground squirrels at Briones Regional Park for twelve years. There wasn’t much these rodents could do that could surprise her.  Then her team saw a ground squirrel stalk, hunt, and eat a California vole. It wasn’t a fluke, like some weirdly motivated or superintelligent squirrel. Because, as the researchers found, the squirrels kept doing it. Again and again. They weren’t sit-and-wait-type predators, but instead chased down the voles over short stretches of dirt. The research team documented 27 individual squirrels hunting voles that summer. “I could barely believe my eyes,” says Sonja Wild, a postdoctoral research fellow in the UC Davis Environmental Science and Policy department who co-authored a paper in the Journal of Ethology on the unusual phenomenon. “From then, we saw that behavior almost every day. Once we started looking, we saw it everywhere.” A California ground squirrel on the move with its unusual prey: a California vole. Normally, ground squirrels eat a mostly plant-forward diet. (Sonja Wild/UC Davis)It was easy to see what was triggering it: there were just so many voles around. “This was shocking,” says Smith, a University of Wisconsin-Eau Claire professor who studies social mammals and lead-authored the paper, which was published in December last year. “We had never seen this behavior before.”  California ground squirrels (Otospermophilus beecheyi), on most days, have a plant-forward diet. They have also been known to eat meat such as bird eggs, hatchlings, insects, or each other on occasion—but this is the first time in nature that they had ever been documented hunting and eating California voles. “The widespread nature of vole hunting in our population fundamentally changes our understanding of this primarily granivorous species, suggesting that they are considerably more flexible in their diet than previously assumed,” the researchers wrote. California voles (Microtus californicus) are a burrowing rodent species that range from southern Oregon down to Baja California—sometimes living (dangerously?) in ground squirrel burrows. They are ubiquitous, but since they live underground, I usually only see a handful of these rodents every year.  That all changed last year. Female voles can have back-to-back litters—every 21 days—if conditions are right. Just imagine. (Vishal Subramanyan)A heck of a lot of voles In May, I was hiking in Sycamore Grove Park, a regional preserve in Livermore that I’ve been visiting for over seven years. As a wildlife photographer, I spend a lot of time in nature: being still and quiet, watching for animals. This time, from the start, I saw dozens of these tiny rodents running all over the trails. I’d only seen a couple of voles in this park over the years. I saw more of them in a few minutes than I had over the past several years. Throughout the course of my hike, I counted over 100 voles. It was a photographer’s dream. I hunched down and took dozens of photos as the voles scurried through fields, climbed on stalks, and ran in and out of their burrows. It appeared Northern California was in the midst of a vole population boom. Reports emerged of huge surges in their numbers, from San Francisco to Pleasanton to the El Dorado Hills, east of Sacramento. Smith’s team, crunching numbers from the community science platform iNaturalist, reported people logged seven times as many vole sightings in California as the average over the past decade. Livermore, like Briones Regional Park, was crawling with California voles last summer. (Vishal Subramanyan)Booms like this have occurred in the past. Just like their more famous cousins the lemmings, vole populations sometimes just go through the roof—reaching densities of up to 5,000 animals per acre. To humans, these booms may seem random. Vole populations typically cycle up and down over periods of three or four years, Smith says, but this was the biggest boom she saw over twelve years of study.  One thing that’s clear: Peak Vole is achieved by female voles reproducing at much higher rates than usual, according to Phoebe Edwards. She studied meadow vole population cycles for her Ph.D. thesis and is now an assistant professor of ecology, evolution, and organismal biology at Iowa State University. “As they’re increasing from a low population density, the females that are sexually mature are having lots of litters rapidly, back to back,” Edwards says. “They can even become pregnant once they’ve just given birth, and not all mammals can do that.” Voles can give birth to new litters every 21 days, she says. At the boom’s peak, birth rates slow. What sets off such industrious behavior? Generally, Edwards says, it’s because an opportunity has arisen: there’s more food around (possibly because of the climate changing), or fewer predators, or “changes to landscape use where voles are colonizing new kinds of habitats that weren’t really suited to them before,” said Dr. Edwards. Everybody likes eating voles The ground squirrels, like many, took advantage of the situation. Over the summer of 2024, researchers observed them hunting voles on 74 occasions over just 18 days of fieldwork. Of these, 31 involved active hunting, with squirrels stalking through tall grass or chasing voles across open dirt. And the hunters were quite successful—17 of the 31 documented attempts (55 percent) resulted in a kill.  Sometimes, squirrels tolerated other squirrels grabbing their killed voles. But occasionally the researchers saw squirrels fighting over their prizes. That made sense, they wrote, because “the energy contained in a single vole far outweighs that of more common food items, such as seeds or grasses.”  Population booms of small mammals like voles impact whole ecosystems, affecting predators and other animals. A slew of animals prey on voles, as Smith and team noted in their paper—“hawks, owls, egrets, long-tailed weasels, coyotes, skunks, mountain lions, and garter snakes”—all of which likely had more to eat. Burrowing rodents like voles are often ecosystem engineers, too, creating tunnels that other animals use. So more voles could also mean more habitat for those species. But these booms don’t last forever—so as vole populations crash, predators may be once again forced to turn to other prey, and small animals will have fewer places to live.  While the vole boom was a boon for animals with a taste for rodents, it touched human lives a bit differently. Grape grower Dane Stark, who runs Page Mill Winery in Livermore, noticed one summer day that some unknown vandal had nibbled a ring out of the bark on many of his youngest vines. He waited and watched, and quickly learned that the culprits were voles. They got to nearly all his vines. “I’ve been growing grapes for twenty years, and this is the first time I’ve ever noticed something like this,” Stark says. He hoped that the surge in vole numbers would bring in more predators to help control their exploding populations. Researchers documented last summer’s sharp spike in iNaturalist observations of California voles in their paper in the Journal of Ethology. (Courtesy of the authors)Have we passed Peak Vole?  It’s hard to know when or if the vole population boom is over. It would likely require an intensive field survey to get an accurate idea of their numbers. However, on my recent hikes this winter, I’ve observed far fewer voles compared to last summer. Community science reports on platforms like iNaturalist, which were essential in recording the vole boom last year, may also help understand the timing of the boom’s end.  Bobcats were among those that likely cashed in on a surfeit of voles last summer, along with “hawks, owls, egrets, long-tailed weasels, coyotes, skunks, mountain lions, and garter snakes,” according to researchers. (Vishal Subramanyan)The boom also raises other ecological questions, such as whether California ground squirrels learn hunting strategies socially or if it is a genetic predisposition. Wild and Smith are also interested in disease implications of the novel squirrel–vole interaction. “Parasites might be shared between voles and squirrels,” says Smith. “Future research will reveal the extent to which these interactions have positive or potentially negative consequences for ground squirrel populations.”  I’ll remember it fondly, as a wildlife photographer, given the abundance of photo opportunities the voles gave me. One evening, at a local park in Fremont. Down on the ground, voles were scampering across the fields. I watched as a bobcat quietly stalked prey alongside the trail. After patiently waiting for a few minutes, the bobcat pounced, grabbing one of the many voles that scattered these fields. It immediately took the vole and started trotting towards the cover, disappearing over the ridge as the sun set. In a prey boom, the mandate is the same for photographers as for bobcats: strike while it’s hot.  VIDEO A video compilation of ground squirrels hunting. Note: this contains some graphic imagery. (Sonja Wild, UC Davis)

Markus Buehler receives 2025 Washington Award

Materials scientist is honored for his academic leadership and innovative research that bridge engineering and nature.

MIT Professor Markus J. Buehler has been named the recipient of the 2025 Washington Award, one of the nation’s oldest and most esteemed engineering honors. The Washington Award is conferred to “an engineer(s) whose professional attainments have preeminently advanced the welfare of humankind,” recognizing those who have made a profound impact on society through engineering innovation. Past recipients of this award include influential figures such as Herbert Hoover, the award’s inaugural recipient in 1919, as well as Orville Wright, Henry Ford, Neil Armstrong, John Bardeen, and renowned MIT affiliates Vannevar Bush, Robert Langer, and software engineer Margaret Hamilton.Buehler was selected for his “groundbreaking accomplishments in computational modeling and mechanics of biological materials, and his contributions to engineering education and leadership in academia.” Buehler has authored over 500 peer-reviewed publications, pioneering the atomic-level properties and structures of biomaterials such as silk, elastin, and collagen, utilizing computational modeling to characterize, design, and create sustainable materials with features spanning from the nano- to the macro- scale. Buehler was the first to explain how hydrogen bonds, molecular confinement, and hierarchical architectures govern the mechanics of biological materials via the development of a theory that bridges molecular interactions with macroscale properties.His innovative research includes the development of physics-aware artificial intelligence methods that integrate computational mechanics, bioinformatics, and generative AI to explore universal design principles of biological and bioinspired materials. His work has advanced the understanding of hierarchical structures in nature, revealing the mechanics by which complex biomaterials achieve remarkable strength, flexibility, and resilience through molecular interactions across scales.Buehler's research included the use of deep learning models to predict and generate new protein structures, self-assembling peptides, and sustainable biomimetic materials. His work on materiomusic — converting molecular structures into musical compositions — has provided new insights into the hidden patterns within biological systems.Buehler is the Jerry McAfee (1940) Professor in Engineering in the departments of Civil and Environmental Engineering (CEE) and Mechanical Engineering. He served as the department head of CEE from 2013 to 2020, as well as in other leadership roles, including as president of the Society of Engineering Science.A dedicated educator, Buehler has played a vital role in mentoring future engineers, leading K-12 STEM summer camps to inspire the next generation and serving as an instructor for MIT Professional Education summer courses.His achievements have been recognized with numerous prestigious honors, including the Feynman Prize, the Drucker Medal, the Leonardo da Vinci Award, and the J.R. Rice Medal, and election to the National Academy of Engineering. His work continues to push the boundaries of computational science, materials engineering, and biomimetic design.The Washington Award was presented during National Engineers Week in February, in a ceremony attended by members of prominent engineering societies, including the Western Society of Engineers; the American Institute of Mining, Metallurgical and Petroleum Engineers; the American Society of Civil Engineers; the American Society of Mechanical Engineers; the Institute of Electrical and Electronics Engineers; the National Society of Professional Engineers; and the American Nuclear Society. The event also celebrated nearly 100 pre-college students recognized for their achievements in regional STEM competitions, highlighting the next generation of engineering talent.

UN Talks End in Rome With Nations Backing $200 Billion a Year Plan to Protect Nature

Global negotiators concluded an extended session of the United Nations biodiversity conference, COP16, with key commitments on funds needed and the institutions through which the funds will be channeled to protect the world’s biodiversity

BOGOTA, Colombia (AP) — Global negotiators concluded an extended session of the United Nations biodiversity conference, COP16, with key commitments on funds needed and the institutions through which the funds will be channeled to protect the world's biodiversity.The countries agreed on how they would contribute $200 billion a year by 2030 that was committed in principle at an earlier meeting in Montreal. The money includes a plan to raise $20 billion in annual conservation financing for developing nations by 2025, with that number rising to $30 billion annually by 2030, and on details of the Global Biodiversity Framework, which aims at placing 30% of the planet and 30% of degraded ecosystems under protection by 2030. Earlier this week, the countries also agreed to create the Cali Fund, which will create methods for industries that commercially benefit from biodiversity to contribute to its conservation.As the meeting concluded late Wednesday in Rome, participants stood up and applauded the outcomes. “The applause is for all of you. You have done an amazing job,” said the COP16 president, Susana Muhamad of Colombia.COP16’s successful conclusion is the first United Nations meeting in many months which ended on a positive note, as various meetings all through last year related to dealing with the global plastic pollution, climate change and the earlier biodiversity meeting itself failed to reach agreements or left many stakeholders disappointed with the outcomes reached. “These days of work in Rome have demonstrated the commitment of the parties to advance the implementation of the Global Biodiversity Framework,” said Muhamad who is also Colombia’s former environment minister. Muhamad said it was the collective effort of all stakeholders which resulted in the key decisions being agreed upon. “Only by working together can we make Peace with Nature a reality,” she said.The two-day meeting addressed issues that were left unresolved in earlier discussions held in Cali, Colombia in late 2024, focusing on securing funds to meet ambitious targets set in Montreal in 2022. The Cali meetings ended without a quorum as talks ran into overtime and too few delegates remained to guarantee that any decisions made had the backing of all U.N. member states. Linda Krueger, Director of Biodiversity & Infrastructure Policy at The Nature Conservancy, said that in Cali many parties felt that funds created to support biodiversity didn't meet the original goals they had hoped. But in Rome, negotiators were able to agree on a financial “roadmap” that would allow the body to fulfill its original obligations.“At a complicated geopolitical moment, this is an exciting show of progress and international cooperation for nature,” she said. "Technocratic as they might sound, these are the details that will transform ambitions on paper into tangible conservation action on the ground."Oscar Soria, chief executive of The Common Initiative, a think tank, said the decision by the U.N. negotiators marked “a positive step” toward funding biodiversity efforts, setting clear goals and a review process.“However, effectiveness will depend on the implementation of the commitments, the availability of financing and the political will of countries to increase their contributions,” he added.Even though key issues related to funding were finally resolved in the extended meeting in Rome, the COP16 talks in Colombia, which concluded in November, produced several notable agreements, including a landmark deal requiring companies that profit from natural genetic resources, such as developing medicines from rainforest plants, to share those benefits. Progress was also made toward strengthening the role of Indigenous peoples and local communities in conservation efforts.Scientists say biodiversity is essential for maintaining balanced ecosystems, providing clean air, water and food while supporting climate resilience. It also drives medical discoveries, economic stability, and the well-being of all life on Earth.The Associated Press’ climate and environmental coverage receives financial support from multiple private foundations. AP is solely responsible for all content. Find AP’s standards for working with philanthropies, a list of supporters and funded coverage areas at AP.org.Copyright 2025 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.Photos You Should See - Feb. 2025

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