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Biology

Entomologist Mark Moffett photographed cone ants climbing onto and cleaning harvester ants.

These Tiny Ants Crawled All Over Larger Ants and Licked Them Clean. Scientists Aren’t Sure How This Behavior Benefits Any of Them

After witnessing the interactions in an Arizona desert, a Smithsonian researcher suggests that the little ants picked off tasty treats and that the big ants got thoroughly groomed in hard-to-reach places

The clitoris is larger than most people think, and much of the organ is internal.

Scientists Just Made the Most Complete Map of the Clitoris’s Sensory Nerve Network. Here’s What They Found

Cultural taboos around female sexuality have hindered research on the organ. But a new study provides pivotal insights that can inform important surgeries and health care

An artist's rendition of Captorhinus in its death pose

This Nearly 300-Million-Year-Old Mummified Reptile Reveals the Evolutionary Origins of How We Breathe

Unusually well-preserved fossils have provided the earliest known evidence of a land vertebrate that could pump air in and out of its chest using muscles between the ribs—the same strategy used by modern mammals, reptiles and birds

An artificially colored human B cell, the type of immune cell that caused all three autoimmune diseases in the patient

In a First, This Personalized Cell Therapy Treated Three Life-Threatening Autoimmune Diseases in One Patient

The patient was bedridden and needed daily blood transfusions, and she had tried nine different therapies that didn’t bring lasting effects. So, researchers modified some of her immune cells so they would attack her faulty cells

Images of shellear fish climbing up the rock face behind Luvilombo Falls

Watch These Rock-Climbing Fish Scale a 50-Foot Waterfall in the Congo Basin, the First Known Evidence of This Behavior in Africa

The tiny fish, called shellears, use microscopic hook-like growths on their fins to ascend—and they take a lot of breaks. The full climb probably takes about ten hours, according to a new study

An artistic rendering shows the mysterious animal, which researchers now say was a nautilus relative, in its prehistoric environment.

This Fossil Held the World Record for the Earliest Known Octopus. Turns Out, It’s Not an Octopus After All

New research suggests the 300-million-year-old specimen is actually a relative of the nautilus

The Mekong giant catfish is an endangered freshwater species.

Freshwater Fish Migrations Are Disappearing Across the Planet, Finds U.N. Report

The assessment identified over 300 species of fish that urgently need international conservation effort

Cow sharks (one shown) and frilled sharks are members of the newly proposed lineage.

What Is a Shark? A New Genetic Analysis Throws an ‘Unexpected Wrench’ Into Our Understanding of the Ocean Predators

Some shark species might belong to their own distinct lineage, which is separate from all other sharks, rays and skates, according to a new study

Getting caught in the rain can be fatal for bees since they breathe through tiny openings in their exoskeleton.

See the Amazing Images That Showcase the Short, Brilliant Lives of Honeybees Throughout the Seasons

A new book follows the insects through rain and shine and highlights the unique behaviors of each bee in a colony

Becoming an expert birder might support brain health, according to a new study.

Becoming an Expert Birder Can Reshape Your Brain and Might Help Protect It From Aging, New Research Suggests

Compared with novices, seasoned birders had denser, more structurally complex brain regions involved with tasks like object identification, visual processing, attention and working memory

Megachelicerax cousteaui and a close-up of one of its pincers, or chelicerae

This 500-Million-Year-Old Fossil of a Claw-Bearing Predator Uncovers the Origins of Spiders, Scorpions and Other Arthropods

A new analysis of a specimen found more than 40 years ago reveals the oldest known chelicerate, defined by its pair of pincer-like appendages

Bruce Jayne, a biologist at the University of Cincinnati, co-authored the new paper, which examined the locomotive abilities of three brown tree snakes (like the one pictured here) and a scrub python.

How Do Snakes ‘Stand’ Upright Nearly Stick-Straight? New Research Points to How They Pull Off the Gravity-Defying Feat

These clever creatures seem to concentrate their muscle activity near their bases, which helps them cross gaps between tree branches in the wild

Male reproductive cells, sperm, might struggle to reach and fertilize female reproductive cells, eggs, in microgravity, according to a new study.

Humans Might Struggle to Make Babies in Space. Sperm Gets Disoriented in Microgravity, a New Study Suggests

Simulated near-weightless conditions reduced human sperm’s navigational abilities

The sperm whales gathered around the mother before the delivery. 

Watch Unprecedented Footage of Sperm Whales Helping a Newborn Calf Take Its First Breaths

Unrelated animals worked with the mother and her relatives, marking the first known evidence of whales from multiple families assisting in a birth

Modern fish traps require pilings that are driven into the riverbed and netting that reaches across part of a river.

Fish Traps Have Been Banned on the Columbia River for Nearly a Century. Could Bringing Them Back Help Save Salmon?

A new experiment is testing the commercial success of fish traps in Washington and Oregon. Even as some conservationists embrace the technique, its return has reopened old wounds among local fishers

The perception of sleep is just as important as the quality of sleep.

Vivid Dreams Might Be Key to Feeling Well Rested When You Wake Up, According to a New Study

The findings could help explain the purpose of dreams and help physicians better treat people with sleep disorders

Snowdrops can push through snow and icy ground to bloom in winter, bringing their blossoms to the largely dormant landscape.

How a Small Winter Flower Has Attracted Droves of Admirers—and Offers a Symbol of Resilience

The snowdrop, or Galanthus, blooms when the world is still frozen. Gardeners enamored with the plant gather each year in Pennsylvania to celebrate its subtleties and endurance

A regent honeyeater at the Taronga Zoo in Sydney, Australia, which is one of the study sites where the critically endangered birds are being bred

This Critically Endangered Bird’s Song Was About to Disappear. Scientists Saved It by Recruiting Some Wild Vocal Tutors

Wild-born male regent honeyeaters passed their cultural knowledge to young captive-born birds

Researchers recently discovered that platypuses are the only known mammals with hollow melanosomes, a pigment-filled structure that gives hair, fur, skin, feathers and eyes their color. 

Platypus Hair Shares a Puzzling Feature With Bird Feathers, Adding to the Egg-Laying Mammal’s List of Unusual Characteristics

The species’ melanosomes—tiny, pigment-filled structures inside hair cells—are hollow, a trait never before seen in mammals

3D rendering of an Eciton hamatum subsoldier ant

These Stunningly Detailed 3D Images of Ants Showcase the Remarkable Diversity Across Their Many Species

Scientists used a game-changing technique to scan about 2,200 preserved specimens in just one week to create the Antscan database

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