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Animals

A common octopus (Octopus americanus) raises its arm in southern Florida.

Scientists Map the Ways Octopuses Use Their Complex Arms, Revealing Preferences for Certain Tasks

The cephalopods appear to favor using their front arms, according to a new study, though their back arms help with locomotion

A sheep jaw bone was one of the samples analyzed in the new study.

New Research

Large Groups Came Together for Grand Feasts at the End of the Bronze Age in Britain

After analyzing bone fragments found in millennia-old trash piles, researchers say that people may have brought livestock from far and wide to consume in the south

Joro spiders are essentially harmless to humans and pets, but scientists are concerned about their impact on native species.

Scientists Want Your Help to Track the Spread of Invasive Joro Spiders at Great Smoky Mountains National Park

The invasive arachnids were first spotted in the park last year, and now, researchers hope to keep tabs on when and where they occur

Many rodents have nails on their thumbs and claws on the rest of their fingers. A new study suggests this trait might have been key to their world domination.

Rodents Conquered the World With the Help of Their Thumbnails, Study Suggests

The trait might have given rodents greater manual dexterity, allowing them to access new foods, such as nuts

A roman mosaic shows a fighting North African Atlas bear.

New Research

The Skull of an Ancient Brown Bear Tells a Story of Brutality and Abuse at the Hands of Roman Entertainers

The bear was caught in the Balkans and caged for years to perform in an amphitheater

The vaccine can be administered to koalas in a single dose.

A New Vaccine Could Help Save Australia’s Beloved Koalas From Chlamydia, and It Just Got Approved

The disease causes blindness, infertility, severe urinary tract infections and death in the iconic, furry marsupials, which are also threatened by habitat loss

A juvenile spotted ratfish. These deep-sea fish are named for their long, rat-like tails.

This Deep-Sea Fish Has Teeth on Its Forehead—and It Uses Them for Sex

Researchers suggest the rows of pointed structures on the heads of spotted ratfish are true teeth, offering the first known example of teeth located outside the jaw

The bumpy snailfish (Careproctus colliculi) is one of three new deep-sea species described.

Cool Finds

Biologists Discover Surprisingly Cute Deep-Sea Fish Species Off the Coast of California

Meet the bumpy snailfish—described by scientists as “adorable”—as well as the dark snailfish and sleek snailfish, all of which thrive thousands of feet below the surface of the Pacific Ocean

A leatherback sea turtle hatchling climbs over sargassum on a beach. In a new study, researchers timed sea turtles to see how long it took them to reach the ocean when they had to traverse piles of seaweed.

Seaweed Piles Are Slowing Down Sea Turtle Hatchlings as They Make the Dangerous Trek to the Ocean

In Florida, large mats of sargassum are increasingly washing ashore, creating another obstacle for loggerhead, leatherback and green sea turtles, new research suggests

Maasai Mara National Reserve, Kenya

See Ten Gorgeous Photographs of Lions and Discover What Makes the Majestic Felines Special

A new book of essays and images reveals the history of the big cats and how they’ve become a vulnerable species today, and uncovers little-known facts about them

Two brothers of different species, produced by the same mother: Messor ibericus (left) and Messor structor (right).

These Ant Queens Seem to Defy Biology: They Lay Eggs That Hatch Into Another Species

Iberian harvester ant queens produce offspring of their own species and of the builder harvester ant, seemingly by cloning males

Researchers studied genetic samples from 483 mammoths, including from their tusks, bones, skin and molars (shown here).

Scientists Investigate the Bacteria That Colonized Extinct Mammoths—and Uncover the Oldest Known Microbial DNA From a Host

Some of the microbes might have been benign or helpful, while others could have caused deadly diseases

Many different types of animals, from birds to orcas, are affected by human noise.

Five Dramatic Ways Animals Respond to Human Noise, From Mimicking Car Alarms While Wooing Mates to Calling Higher Over the Din of Traffic

As human-caused sound gets louder around the world, some animals change their behavior and many creatures suffer health issues

An aardvark emerges from its burrow.

Could Aardvark Burrows Be Ground Zero for the Next Pandemic?

Animals of all kinds mix and mingle in the underground refuges, offering troubling opportunities for diseases to jump species

An artist's interpretation of what early penguins in New Zealand might have looked like

Early Penguins Had Long, Dagger-Like Beaks for Skewering Fish, New Zealand Fossils Reveal

Paleontologists describe four new species of extinct ancestral penguins that help shed light on how the iconic birds evolved after dinosaurs went extinct

A new study examines how bees adapt to build honeycombs on top of various 3D-printed foundations.

Bees Manage to Build the Best Honeycombs, Even on Imperfect Foundations

In a new study, scientists tested how honeybees adapt to construct their hives on 3D-printed foundations of varying sizes

Pygmy seahorses are exceptional camouflage artists.

These Bumpy Little Seahorses Are Amazing Camouflage Artists. Scientists Pinpoint the Gene Loss Behind Their Special Traits

Bargibant’s pygmy seahorses look almost exactly like the gorgonian corals they live in, thanks in part to their unusually stubby snouts

Some of the impacted points and bladelets found at Obi-Rakhmat

New Research

Could These 80,000-Year-Old Stones Be the World’s Earliest Known Arrowheads?

A new study suggests that fragments unearthed at an archaeological site in Uzbekistan look like other examples of arrowheads created thousands of years later

Yagi (left) and Quinn (right) are searching for evidence of critically endangered Sumatran rhinos in Indonesia's Way Kambas National Park.

Two Sniffer Dogs Might Have Just Found a Lost Population of Critically Endangered Rhinos

Yagi and Quinn identified scat that was likely left by a Sumatran rhinoceros in Indonesia’s Way Kambas National Park, where scientists thought the animals had disappeared

Bison graze near the north entrance of Yellowstone National Park in Gardiner, Montana.

Restoring Bison to Yellowstone Has ‘Reawakened’ the Ecosystem as the Large Animals Migrate, Study Suggests

An analysis of plant diversity and soil health across the bison migration corridor suggests free-roaming bison lead to more nutrient-rich plants

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