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.
Beaver attacks get a lot of media attention but are beavers really crazed killers that we should be afraid of? And what good do they really do?
They look so cute and fluffy, but koalas have a fierce side too. Still, their biggest threat to survival is mankind.
Gorillas can live to be about 35 to 40 years old and are much gentler (and much sleepier) than you might think.
The female emu may lay the eggs, but the male emu does all the caretaking. And that's just one fascinating thing we learned.
They're weird-looking and mild-mannered, but Asian and African markets can't get enough illegal pangolin scales.
They're the cutest and most curious masked mammals around. But they also have a reputation for being a nuisance. Here's everything you need to know about the raccoon.
Sea otters are adorable, back from the brink of extinction and will totally bite you.
Move over Dracula. These fish, birds and bats really are the vampires of the animal world — and they do need to eat (or suck) blood to sustain life.
Manatees can weigh up to 1,200 pounds and reach 10 feet in length, but they're so gentle and sweet they'll break your heart.
It turns out that bobcats do just fine if not actively hunted by humans.
The wars between mink species and humans quietly rage worldwide.
Though ol' Wile E. never did catch the Road Runner, coyotes are some of the most ingenious and adaptable animals on the planet.
These impressive and intimidating animals have an illustrious past that helped them wend their way through America and settle in the heartland of the South.
Wolverines, also known as "stink bears" because of the powerful smell they emit, are the ultimate cold weather survivors — cagey, smart and omnivorous.
Groundhogs don't actually make great weathermen, but they are pretty cool in every other respect.
Kinkajous, or honey bears, are generally docile creatures, but they definitely don't mix well with humans.
Jackals, formidable members of the canine family, are often portrayed in traditional world folklore as wily tricksters, up to no good. They are actually brilliant survivalists.
These adorable marsupials look as sweet as their name. But what, exactly, are sugar gliders?
Those red butts on baboons do serve a purpose, sort of, but it's probably not quite what you think.
Orphaned Bornean orangutans need all the help they can get — the Borneo Orangutan Survival Foundation steps in to teach them the art of survival.
It's the job of the huge grizzly bears at Montana's Grizzly and Wolf Discovery Center to test the everything from coolers and trash cans to food storage containers.
Clearing land with goats rather than machinery is eco-friendly, effective and adorable.
Fisher cats aren't actually cats, but cat-sized members of the weasel family, and their favorite snack is — yikes — the porcupine.
Arguably the most charming rodent in the world, the capybara is also the largest.
It is the largest animal ever to exist on the planet.