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.

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Do the humps on camels hold water?

We all know that the humps on a camel help it to survive in the harsh desert environment. What exactly is inside the hump of a camel? Does the hump store water? Find out the answer to these questions in this article from HowStuffWorks.

Why aren't mountain goats really goats?

Humans have a peculiar knack for naming animals based on their doppelgangers instead of their biology. Sea horses aren't really horses is and koala bears aren't exactly bears. So what's the deal with mountain goats versus true goats?

Are Tasmanian devils fighting their way to extinction?

Tasmanian devils are scrappy little marsupials with jaws as strong as tigers'. But a deadly form of cancer is threatening to annihilate the species. Can scientists save the devils before it's too late?

Why Do Lemurs Live Only in Madagascar?

A long, long time ago, lemurs lived all over the world. But something happened to kill them off — everywhere except in Madagascar. How did the island protect them from extinction?

How do African buffalo defend themselves from lions?

Lions aren't known for their tendency to pass up a big, juicy steak. So if you're an African buffalo, how can you keep your hide intact?

Why do wildebeests spend their whole lives migrating in a circle?

Ever heard that the grass is always greener on the other side? While we may think of it as a quaint proverb, wildebeests abide by it. In fact, their entire lives' purpose is dedicated to finding the greenest, freshest patch of grass.

How do armadillos roll into a ball?

Remember practicing the stop, drop and roll drill in school? If you were an armadillo, rolling up into a tight little ball would be second nature. But how do these armored creatures tuck every last square inch of themselves into a sphere? And why?

How do walruses sleep in the water without drowning?

Whether you're sleeping on a water bed or napping during a rainstorm, water has a calming effect. Walruses also make use of soothing waves, but why don't they drown when catching submerged shut-eye?

Why do rhinos charge anything unfamiliar?

Those of us who wear glasses will just stew in our own astigmatic juices if we're called "four eyes." Nearsighted rhinos, however, use their pointy horns for payback.

How Does a Hippo Make Its Own Sunscreen?

A hippo doesn't need to lumber to the local drug store and buy sunscreen; it can make its own. And the method is pretty ingenious.

What's the difference between a bobcat and a lynx?

The bobcat and lynx may not be much larger than your house cat lounging on the couch, but these felines rely on specific adaptations to survive in the wild.

What's the best way to remove porcupine quills?

Porcupines know nothing of bad hair days. These walking pin cushions use their prickly "hairs" to impale any animal that may pose a threat to their well-being.

What's the difference between an anteater and an aardvark?

If your home has termites and the exterminator is booked, you might want to send in an anteater or aardvark. Though both these animals love insects, they're two totally different species.

Why is wombat scat shaped like a cube?

Perhaps just as puzzling as the Rubik's Cube (though not as colorful), the purpose of wombat scat's geometrical shape seems mysterious. So what's the scoop on wombat poop?

Why are sloths so slow?

Ever since word spread about the seven deadly sins, sloths have been getting a bad rap. These sluggish tree-dwellers conserve energy by stopping to smell (and eat) the roses.

If a skunk sprays me, do I have to bathe in tomato juice?

If you've been sprayed by a skunk, you probably ended up in a bathtub filled with tomato juice. But is there any truth to this treatment, or should we debunk the skunk?

How long can a camel go without water?

As issues like drought make headlines, the topic of water conservation has become critical. Perhaps we should look to the camel for guidance as this desert-dweller saves every last drop.

Could a platypus poison me?

If Mother Nature has a sense of humor, surely the platypus is one of her punch lines. This mammal might look funny, but one of its offensive adaptations is no laughing matter.

Why do warthogs have warts?

Storybook villains always seem to have warts. These unsightly growths may be indicators of wickedness in the fairy-tale world, but they're crucial features for some hogs living in the animal kingdom.

Why Do Raccoons Wash Their Food?

With their built-in masks and ability to snatch food, it seems raccoons were meant for a life of crime. But do these thieves wash away the evidence by rinsing food in water?

Mammal Pictures

Mammals are a ubiquitous and diverse class of animals. Learn all about mammals, including hippopotamuses, killer whales, sugar gliders and more, by viewing this mammal image gallery.

Can I catch plague from a prairie dog?

Prairie dogs may look cute and cuddly, but are these rodents harbingers of deathly plague? Since there aren't any underground pharmacies in prairie dog towns, will disease wipe out these animals?

Why do gorillas build new nests every night?

Besides our genetic similarities, gorillas also share our love of getting a good night's sleep -- except that their alarm clocks come in the form of dangerous predators and poachers.

Do moose really walk the streets of Alaskan cities?

If Bullwinkle had made the move up north, he would have felt right at home. Though moose in Alaska don't have squirrel sidekicks, they do take advantage of their urban surroundings.

Why are otters playful?

If the animal world were school, otters would be those kids who never leave the playground. Always begging for five more minutes of recess, otters take playtime very seriously.