https://phys.org/biology-news/ en-us Read the latest science news from Phys.org on biology, evolution, microbiology, biotechnology Giant manta rays can grow up to nine meters (30 feet) long with a disk size of seven meters (23 feet) across and weigh up to 2,000 kg (4,400 pounds). This size leaves them with very few natural enemies once they reach adulthood at around eight to 10 years old. But giant manta ray babies, called pups, cannot rely on their size to protect them from predators that live in the open ocean, including several species of shark and orcas. https://phys.org/news/2026-10-baby-manta-rays-hunker-coasts.html Plants & Animals Thu, 22 Oct 2026 00:00:01 EDT news711799141 Populations of many pollinators, including bumblebees, have been crashing over the last few decades, thanks to the widespread use of chemical pesticides, loss of habitat and the acceleration of climate change. But it can be hard to know just how bad the problem is, or whether conservation strategies are helping, without relying on lethal traps—which can kill tens of thousands of bees in order to get an accurate count of their populations. https://phys.org/news/2026-10-ai-bee-lethal.html Plants & Animals Wed, 21 Oct 2026 19:40:05 EDT news711817081 Researchers from Ruhr University Bochum have partnered with colleagues in Göttingen, Berlin, Paris and Essen to develop new optogenetic tools that can selectively inhibit cellular activity through light. These tools could help investigate diseases in which the balance between excitation and inhibition is disrupted, such as cardiac arrhythmias. https://phys.org/news/2026-10-optogenetic-tool-inhibits-neurons-heart.html Cell & Microbiology Wed, 21 Oct 2026 19:20:01 EDT news711814801 Why has the yeast Candida auris become a dangerous pathogen worldwide in just a few years? This question is on the minds of many researchers. Carla Schuh and Chaitanya Gokhale from the Biocentre at the University of Würzburg have now summarized the current state of knowledge in a review article in the journal mSphere. To that end, they analyzed around 180 studies by other researchers. https://phys.org/news/2026-10-candida-auris-harbinger-dangerous-fungal.html Evolution Wed, 21 Oct 2026 19:00:01 EDT news711814201 Imagine encountering a rattlesnake in your backyard or while on a hike. It will most likely "freeze" to avoid attracting attention, but if it feels especially threatened, it may rattle and even strike, delivering a painful dose of venom. https://phys.org/news/2026-10-rattlesnakes-alike-personality-venom.html Plants & Animals Wed, 21 Oct 2026 17:40:01 EDT news711793881 A new study from Indiana University shows that being in a positive mood leads orangutans to value what they learned more strongly. The study comes from the lab of Erica Cartmill, professor of animal behavior, anthropology and cognitive science in the College of Arts and Sciences at IU Bloomington, and was led by Daan Laméris, a postdoctoral researcher at IU. https://phys.org/news/2026-10-laughter-orangutans-rewards.html Plants & Animals Wed, 21 Oct 2026 17:00:12 EDT news711793621 Clostridium botulinum bacteria produce a potent neurotoxin called botulinum toxin, which causes the serious illness botulism. The toxin attacks the nervous system, leaving the body unable to control its muscles and making every breath a struggle. Without immediate treatment, botulism can be fatal. Humans, however, have managed to domesticate this dangerous bacterium to do their bidding. Over more than 90 years, biologists have been able to turn a wild microbe into an efficient factory for medical, military and cosmetic products like Botox. https://phys.org/news/2026-10-humans-domesticated-bacterium-botox-treatments.html Evolution Wed, 21 Oct 2026 15:50:01 EDT news711814360 Although the main prey of spotted hyenas (Crocuta crocuta), migratory ungulates such as blue wildebeest (Connochaetes taurinus), now spend substantially less time within hyena territories than they did 30 years ago, hyena clans in the central Serengeti have remained largely stable. https://phys.org/news/2026-10-serengeti-hyenas-clans-stable-climate.html Plants & Animals Wed, 21 Oct 2026 15:40:08 EDT news711805081 The glacial Arctic Ocean was not a barren ice desert but a breeding ground for the evolution of cold adaptation in marine fish. This is the main conclusion of a new scientific publication from Stockholm University that examines small fish bones found in deep-sea sediments during an expedition aboard the Swedish icebreaker Oden. https://phys.org/news/2026-10-ancient-fish-bones-reveal-arctic.html Evolution Wed, 21 Oct 2026 15:20:01 EDT news711803702 Over the past 30 years, Swiss barn owls have become more reddish-brown and more heavily spotted. By analyzing the genomes of more than 3,000 birds, scientists at the University of Lausanne identified the genetic variants linked to these changes in plumage and revealed natural selection at work. Their findings, published in Nature Communications, show that evolution can happen rapidly in the wild. https://phys.org/news/2026-10-swiss-barn-owls-gradually.html Plants & Animals Wed, 21 Oct 2026 15:00:10 EDT news711803641 Researchers at Keele University have discovered that migratory butterflies may use different navigation systems to find their way during migrations, highlighting the importance of understanding how different species may respond to environmental changes. https://phys.org/news/2026-10-butterfly-reveal-migrating-species-natural.html Plants & Animals Wed, 21 Oct 2026 14:20:01 EDT news711801421 Bacteria and the viruses that infect them—known as phages—coexist in soils, oceans and living organisms. Scientists have long thought this coexistence reflects a microscopic version of an evolutionary arms race: As parasites and hosts continually adapt to one another, both evolve ways to survive. But a joint study by researchers at the University of Maryland and the University of Exeter shows different pathways to coexistence. https://phys.org/news/2026-10-scientists-migration-mechanism-enabling-bacteria.html Cell & Microbiology Wed, 21 Oct 2026 14:00:52 EDT news711792422 Keeping to warm climates throughout their 250-million-year history may have helped crocodiles and their relatives survive the asteroid that killed the dinosaurs, finds a new study led by UCL (University College London) researchers. https://phys.org/news/2026-10-climates-crocodiles-outlast-dinosaurs.html Evolution Wed, 21 Oct 2026 14:00:49 EDT news711792541 A pilot study tested an electronic nose, called NOS.E, alongside human-remains detection dogs to see whether it could detect buried remains and help confirm dogs' signals. https://phys.org/news/2026-10-electronic-nose-police-dogs.html Molecular & Computational biology Wed, 21 Oct 2026 14:00:30 EDT news711801841 Whenever a cell divides, it has to split its chromosomes perfectly between two daughter cells, and even a single mistake can be disastrous. Now, researchers from Japan have found that one of the key structures that makes this possible takes a surprising shape: a hollow sphere. https://phys.org/news/2026-10-chromosome-anchors-hollow-shells-cell.html Cell & Microbiology Wed, 21 Oct 2026 14:00:19 EDT news711712921 Vultures were long thought to make few and fairly simple sounds. Yet no one had investigated in detail how the birds use sound to communicate. For his master's thesis in Jorg Massen's Vulture Cognition Lab, Connor Proudfoot studied the critically endangered Rüppell's vulture. He and his colleagues found that the birds produce a wide range of complex sounds, which they use in a range of social situations. The findings, published today in PLOS One, could help improve the success of captive breeding programs and shed light on the evolution of communication. https://phys.org/news/2026-10-silent-vultures-wide-range-communicate.html Plants & Animals Wed, 21 Oct 2026 14:00:01 EDT news711733021 Viruses are sneaky intruders, hijacking the internal machinery of host cells and replicating out of sight. Understanding these dynamics is the first step to developing effective antiviral strategies that could stop infections, but scientists have largely been left in the dark because there are limited tools to study how viruses move in space and time inside live infected cells, according to Joyce Jose, associate professor of biochemistry and molecular biology at Penn State. https://phys.org/news/2026-10-tool-tracks-viral-rna-infected.html Biotechnology Wed, 21 Oct 2026 13:00:13 EDT news711800341 Scientists have proposed what they believe is the first method for detecting "mirror life"—a hypothetical form of life made from molecular building blocks that are the mirror image of those found naturally on Earth. Researchers at the University of Strathclyde and the Department of Chemistry at Durham University have outlined a new approach that could identify mirror organisms using molecules which emit left- and right-handed light. https://phys.org/news/2026-10-based-method-hypothetical-mirror-life.html Biotechnology Wed, 21 Oct 2026 12:00:14 EDT news711798483 Many structures in biology are bounded by membranes, but not all of them. Droplets of a liquid called a coacervate, which form when oppositely charged molecules come together in water, have attracted attention as models for membraneless compartments inside cells and for "protocells," hypothetical primitive cells that may have preceded modern ones. https://phys.org/news/2026-10-liquid-membranes-flex-easily-cell.html Cell & Microbiology Wed, 21 Oct 2026 11:20:14 EDT news711795842 Moderately cold temperatures have proven to effectively extend lifespan and delay age-related decline in animals. However, how cold temperatures trigger these beneficial effects at the molecular level has remained largely unclear. https://phys.org/news/2026-10-newly-metabolic-pathway-cold-lifespan.html Cell & Microbiology Wed, 21 Oct 2026 11:00:34 EDT news711734162 Earlier this year, an outbreak of Andes hantavirus on a cruise ship, which killed three passengers and sickened 13, highlighted the lack of approved vaccines or treatments for the virus. In a study published in Nature, scientists at Albert Einstein College of Medicine and collaborators from Institut Pasteur and LSU Health Shreveport show how the virus recognizes its target on a human cell, a finding that could lead to effective therapies against Andes virus and other hantaviruses. https://phys.org/news/2026-10-scientists-reveal-deadly-andes-hantavirus.html Cell & Microbiology Wed, 21 Oct 2026 11:00:15 EDT news711712681 Marine heat waves are usually seen as destructive events that can disrupt entire ocean ecosystems and trigger massive environmental damage. In 2018 and 2019, an extreme heat wave hit the Bering Sea, causing spring sea ice levels to plummet. https://phys.org/news/2026-10-bering-sea-linked-boom-hybrid.html Plants & Animals Wed, 21 Oct 2026 10:30:02 EDT news711795170 Insects belong to a broader group of six-legged animals called hexapods. This group also includes other less well-known, small animals, including diplurans or two-pronged bristletails, wingless relatives of insects with two rear projections called cerci that resemble feelers or pincers. https://phys.org/news/2026-10-giant-jurassic-fossil-evolution-legged.html Evolution Wed, 21 Oct 2026 10:00:01 EDT news711793855 The oxygen in about every other breath we take comes from microscopic cells—phytoplankton—drifting in the surface of the ocean. Among them is Prochlorococcus, the smallest and most abundant photosynthetic organism in the seas. It single-handedly accounts for roughly 10% of all the carbon that the land and the oceans pull from the atmosphere each year. https://phys.org/news/2026-10-ocean-abundant-loner-microbe-sticky.html Ecology Wed, 21 Oct 2026 09:00:06 EDT news711791161 In the early 1980s, scientists observed an anomaly. Embedded within cell membranes, they identified ion channels with extraordinarily high conductance. These so-called "BK" (Big K, or Big Potassium) channels had roughly 10 times the unitary conductance (i.e., conductance per individual channel molecule) of other potassium channels, enabling much more efficient, rapid transport of potassium ions. And while later structural characterization explained how this happened, no one could understand why. That is, until now. https://phys.org/news/2026-10-current-calcium-longstanding-ion-channel.html Evolution Wed, 21 Oct 2026 05:00:06 EDT news711713221 Researchers at Uppsala University have adapted Cell Painting, a widely used imaging method in drug discovery, to look at individual cells inside small 3D clusters of cancer cells. Two drugs that looked almost identical in ordinary flat cell cultures behaved differently in 3D, and the team linked the difference to how each drug switches on the cell's p53 stress response. https://phys.org/news/2026-10-transparent-minispheres-reveal-alike-cancer.html Cell & Microbiology Wed, 21 Oct 2026 05:00:02 EDT news711713161 In the early days of the COVID-19 pandemic, many households wiped down groceries with disinfectant before putting them away. Hand sanitizer was in short supply. With little information on how the virus spread, people became more cautious of germs from other people. A new University of California San Diego study suggests that humans may not be alone in changing behavior after experiencing a disease threat. https://phys.org/news/2026-10-humans-primates-cautious-germs-viral.html Plants & Animals Tue, 20 Oct 2026 19:00:16 EDT news711638425 Legend has it that a giant elfin, owl-like creature called the chickcharney haunts the islands of the Bahamas. Those who encounter this cryptid on cordial terms are said to be blessed with good luck. Those who disrespect the chickcharney, however, don't fare as well. "If you see one shoe in the field, it means that chickcharney came, picked up this person and took them away," said Jessica Oswald, recounting a story she was told in the Bahamas. https://phys.org/news/2026-10-caribbean-islands-center-diversity-barn.html Evolution Tue, 20 Oct 2026 19:00:04 EDT news711714482 Male seahorses, fishes that belong to the Syngnathidae family, show a distinctive reproductive strategy in which males carry developing embryos in a brood pouch. Their most distinctive feature is the brood pouch on the ventral side of the male fish, into which the female fish transfers her eggs. https://phys.org/news/2026-10-male-seahorse-pouch-proteins-toxic.html Plants & Animals Tue, 20 Oct 2026 18:40:02 EDT news711726601 In most parts of Europe, bees have become less widespread during the last 100 years, according to a new study published in the journal Proceedings of the National Academy of Sciences. https://phys.org/news/2026-10-century-picture-europe-bees.html Plants & Animals Tue, 20 Oct 2026 15:10:28 EDT news711722531