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.
There doesn't seem to be much of a gray area. Most people are a hard yes or yard no.
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.
A group of researchers in Shennongjia National Nature Reserve discovered that these female monkeys are essentially happy to feed each other's offspring.
Perhaps it's a mating signal. Or meant to confuse owls and other predators. Or maybe it's just for looks.
Elephants make a specific sound to warn each other of nearby humans.
This could mean good news for conservation and anti-poaching efforts if other species follow suit.
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.
Penguins stand for months on the coldest ice in the world without their feet freezing, thanks to special blood circulation.
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.
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.
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.
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.
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?
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?
Domesticated animals like dogs and horses are known to respond to human facial expressions, but a new study finds that goats also like it when we smile.
A strange evolutionary plot twist has been uncovered in the search for why elephants rarely get cancer.
A mother orca spent more than two weeks clinging to her dead calf. But why?
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