Mammals
Scientifically-speaking there are 11 mammal groups, and most Mammals are warm-blooded, have body hair, give live birth and nurse their young with milk from mammary glands. Check out these articles about all kinds of mammals.
Leopard Seals Are Apex Predators of the Antarctic
With Fewer Than 10 Left, Can the Vaquita Be Saved?
Humpback Whales Have Made an Amazing Comeback From Extinction
Baby Bats Babble With Moms, Hinting at Human Language Development
Fruit Bats Are the Best Pollinators (and Suppliers of Tequila)
Brazilian Free-tailed Bats Are Way Faster Than We Thought
Alaska's Kodiak Bear Is One of the Planet's Biggest
What's the Difference Between a Brown Bear and a Black Bear?
How Polar Bears Work
Gray Wolves Will Get Federal Protection Again in Much of U.S.
The Serval Stands Tall and Jumps Like A Champion
Are Dingoes Dangerous (and Did One Really Eat a Baby)?
Dik-dik: The Tiny Antelope With the Embarrassing Name
Are Mules, Burros and Jackasses All Donkeys?
Tapir: The Ancient Fruitarian With the Tiny Trunk
What's It Like Inside a Kangaroo's Pouch?
Do Kangaroos Really Box?
The Smiley Quokka Is an Australian Super Survivor
The Tarsier Is One Weird Primate, and Yes, We're Related
Marmosets Are Tiny, Upper Canopy-dwelling Monkeys
Why Do Gorillas Beat Their Chests?
How Long Do Squirrels Live?
'Splooting': It's What All the Cool Squirrels Are Doing This Summer
Squirrels Get Jacked During Hibernation; No Weights Needed!
World's Largest Wolves by Weight: The Mighty and the At-Risk
The Pink Fairy Armadillo Is as Mystifying as Its Name
The Coatimundi Is Cute But Doesn't Make a Good Pet
Learn More / Page 5
There doesn't seem to be much of a gray area. Most people are a hard yes or yard no.
By Meg Sparwath
Sure, opossums eat out of your trashcan, but they're also strange little superheroes.
Your favorite cashmere sweater is super-soft and luxurious. It probably cost you an arm and leg, too. Here's why.
By Jamie Allen
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A group of researchers in Shennongjia National Nature Reserve discovered that these female monkeys are essentially happy to feed each other's offspring.
By Jamie Allen
Perhaps it's a mating signal. Or meant to confuse owls and other predators. Or maybe it's just for looks.
By Jamie Allen
Elephants make a specific sound to warn each other of nearby humans.
By Loraine Fick
A dolphin doesn't breathe automatically, so during sleep, one side of its brain stays awake to ensure the mammal rises to the surface and breathes.
By Loraine Fick
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Penguins stand for months on the coldest ice in the world without their feet freezing, thanks to special blood circulation.
By Loraine Fick
It looks excruciating, and nobody knows exactly why it happens.
Before you declare which team you're on, we've got the breakdown on this auditory battle royal.
By Mark Mancini
When we think of big cats in the wild, we most likely think of lions and tigers. But there are so many more amazing wild cats you've probably never even heard of. Here are five.
By Oisin Curran
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Do humpback whales get tired of singing the same old song, or do they simply start over when it gets too complicated?
A first-of-its-kind study reaffirms why wolves are vital to the health of our ecosystem.
The annual bison roundup in South Dakota's Custer State Park is a spectacle full of cowboys, horses and of course wild buffalo, all set against the backdrop of the rolling Black Hills. It's also about as Americana as you can get.
By John Donovan
Scientists have known for a long time that elephants have no sweat glands and keep cool through slinging mud on their skin. But they didn't know what made the skin so wrinkled — until now.
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The old saw about cats being good catchers of rats was finally put to scientific study — and the results were pretty sad.
A new study found that those spot patterns are not only inherited from mom, they help camouflage baby giraffes in the wild.
A new study paints a grave future for the killer whale, all because of the now-banned chemicals polychlopinated biphenyls — PCBs.
It's a natural phenomenon known as a 'squirrel king.' But what's the deal and why do squirrels get tangled up?
By Jamie Allen
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A dolphin named Billie learned a dolphin-show trick from some captive dolphins, taught her wild friends how to do it and started a fad.
The Indian giant squirrel is covered in flamboyant colors like orange, black and bright purple. But why?
By Jamie Allen
It used to be assumed that African bush elephants avoided the sound of an angry bee hive. Now researchers believe they have receptors to detect a bee's alarm pheromones.
The Humboldt marten was thought to be extinct until it was rediscovered in 1996. Now it is threatened again.
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Breaking news: Dolphins and porpoises don't actually look very much alike.
Once a week or so, sloths climb down from their trees and poop on the ground. It feels so good, they do a little dance. But this time of pleasure is also a time of peril.
By Alia Hoyt