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
Humpback Whales Have Made an Amazing Comeback From Extinction
9 Enormous Facts About Sperm Whales, Gigantic Creatures of the Sea
The Largest Bat in the World Has a Wingspan Over 5 Feet
Baby Bats Babble With Moms, Hinting at Human Language Development
Fruit Bats Are the Best Pollinators (and Suppliers of Tequila)
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)?
Bison vs. Buffalo: What's the Difference?
Lamb vs. Sheep: Do You Know the Difference?
Dik-dik: The Tiny Antelope With the Embarrassing Name
What Do Possums Eat? Most Things, It Turns Out
What's It Like Inside a Kangaroo's Pouch?
Do Kangaroos Really Box?
The Tarsier Is One Weird Primate, and Yes, We're Related
Marmosets Are Tiny, Upper Canopy-dwelling Monkeys
Why Do Gorillas Beat Their Chests?
Rat vs. Mouse Identification: Which Is Eating Your Cheese?
Chipmunk vs. Squirrel Sizes, Habitats and Characteristics
How Long Do Squirrels Live?
What Is the Biggest Cat in the World? Top 9 Species in the Wild
Cheetah vs. Leopard: Can You Spot the Differences?
Bunny vs. Rabbit: Is There a Difference?
Learn More / Page 5
Despite being known as the "lesser panda," the red panda is so totally cute, we simply can't use that moniker. No way. Not now. Not ever.
The ocelot may look like a slightly wilder version of a domesticated tabby cat, but they are three times the size of house cats, much fiercer and, though abundant in some areas, still endangered.
These adorable little rodents are popular as pets, but they require some special care.
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It may seem like just the cutest thing in the world to you, but owning a pet monkey is a really bad idea. Here's why.
These little critters are super cute, so why do they have a reputation for being one of the worst of the mammal world?
By Mark Mancini
Llamas and alpacas are very similar animals, but the differences in personality are striking.
Because most of what we know about honey badgers comes from a three-minute comedy video, there are a lot of misconceptions about these wily weasels.
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Sure, hedgehogs are cute as heck, but do you think one really wants to live in your house?
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.