Mammals

Otters get fidgety when they're hungry.

Otters 'Juggle,' but the Behavior's Function Remains Mysterious

The animals seem to fidget more when they are hungry

The Melbourne Zoo welcomed three baby snow leopard cubs in February.

Celebrate Mother's Day With Nine Baby Animal Livestreams

This Sunday, celebrate the moms of the animal kingdom with kittens, polar bear cubs, eaglets and more

Adalatherium hui's strange teeth made it especially difficult to classify.

66-Million-Year-Old 'Crazy Beast' Finds a Taxonomical Home

The opossum-sized mammal lived in Madagascar at the end of the age of the dinosaurs

In total, the team’s analysis covered 134 populations and 101 species, including lions, orcas, reindeer, and squirrels.

Females Live Longer Than Males—Among Humans and Other Mammals, Too

A sweeping new study of 101 mammal species found that females live, on average, 18.6 percent longer than their male counterparts

A female wolverine roams the Arctic tundra at the edge of the Brooks Range, on Alaska’s North Slope. 

Why Wolverines Are the Arctic Animal We Love to Hate

Scientists brave the deep snows and frigid cold of Arctic Alaska to study one of its most furtive and ferocious denizens

Oscillations originating deep inside the sun become detectable only on the surface.

How Do Scientists Record Sounds From the Sun? And More Questions From Our Readers

You’ve got questions, we’ve got experts

A melanistic Indian leopard in Nagarhole National Park.

Why Are Black Leopards So Rare?

Several species of cat have members with all-black coats, but the evolutionary advantages and disadvantages are just starting to be understood

CGI rendering of ancient Loxolophus mammal taken from the PBS NOVA special, Rise of the Mammals. In this recreation, Loxolophus scavenges for food in the palm dominated forests found within the first 300,000 years after the dinosaur extinction.

Fossil Site Reveals How Mammals Thrived After the Death of the Dinosaurs

Recent discoveries highlight how mammals lived before and after the asteroid impact that triggered the world's fifth mass extinction

An aye-aye lemur.

Extra Thumb Discovered on Aye-Aye Lemurs, Giving These Primates Six Fingers

Used for gripping limbs, a “pseudo-thumb” makes the hands of these bizarre primates even creepier

Let the battle of the bulge commence

Holly Cow! Fattest Bear of Them All Claims Coveted Title

For #FatBearWeek2019, the furever fabulous 435 Holly reigns triumphant

Too cute to be nameless.

Help the Shedd Aquarium Name Its Rescued Otter Pups

The aquarium hopes the contest will help raise awareness about southern sea otters’ ongoing conservation needs

Once Thought to Be Extinct, This Lucky Clover Has Recovered Enough to Come Off the Endangered List

Running Buffalo Clover, which once spread on trampled ground left by bison, has made a comeback in the Midwest and Appalachians

This bat gleans insects from leaves. A team of researchers discovered that by approaching a leaf at an oblique angle, it can use its echolocation system to detect stationary insects in the dark.

Bats Use Leaves as Mirrors to Locate and Catch Their Prey

The latest discovery in the arms race between bats and insects reveals that even silent, motionless dragonflies aren't safe

The bottlenose mother, pictured here with her adoptive whale calf and biological daughter, exhibited unusually tolerant behavior

Researchers Document First Known Case of Dolphin Mom Adopting Whale Calf

The melon-headed male whale actively competed for his adoptive mother's attention, repeatedly shoving his bottlenose dolphin sister out of the way

Biswamoyopterus gaoligongensis

New Species of Giant Flying Squirrel Discovered in China

Weighing 3 to 4 pounds, the Mount Gaoligong flying squirrel was recently found in Yunnan province

Minke whale on a whaling ship in a Hokkaido port on July 1, 2019.

Japan Resumes Commercial Whaling in Its Home Waters

As of yesterday, the whaling fleet had caught 2 minke whales and set a quota of 227 animals for the rest of 2019

An artist’s rendering of ancient Arctic hyenas belonging to the genus Chasmaporthetes. A new study reports that two enigmatic fossil teeth found in Yukon Territory in Canada belonged to Chasmaporthetes, making the teeth the first known fossils of hyenas found in the Arctic.

Prehistoric Hyena’s Teeth Show Bone-Crushing Carnivore Roamed the Arctic

The only hyena to live in North America, <i>Chasmaporthetes</i>, had the stature of a wolf and the powerful jaws of its modern relatives

Unlike modern beavers, which use their sharp-edged teeth to chop up trees and build dams, mega-sized ones were unable to alter their environment to fit their needs

Why Did These Human-Sized Beavers Go Extinct During the Last Ice Age?

A new study suggests the giant beavers disappeared after their wetland habitats dried up, depriving the species of its aquatic plant-based diet

If listed under the Endangered Species Act, giraffes would become eligible for federal funding aimed at conservation, and limits would be placed on the import of the animal's body parts

The United States May List Giraffes as an Endangered Species

Last week, the U.S. Fish and Wildlife Service announced plans to conduct in-depth review of the popular animal's threat status

Argali are the largest wild sheep in the world, weighing up to 400 pounds.

The Decades-Long Effort to Protect the World's Largest Sheep

In the Gobi Desert, where argali roam, a group of Mongolian researchers work to conserve the wild sheep populations

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