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.
It's the first evidence researchers have of the whales using their "unicorn horns" to capture prey.
Humans may not be the only animals that dig a soothing whiff of lavender oil.
Deprived of oxygen, naked mole rats can alter their metabolic functions to something less mammalian and more plantlike, burning fructose instead of glucose.
It's like the movie "Groundhog Day" every April, but with hibernation, a smaller rodent and way more hormones.
Officials are building bridges and underpasses to help animals safely cross busy roadways, which keeps the motorists and crossing creatures out of harm's way.
Scientists hope to eliminate need for tagging, extend system to other wild animals.
The two elephants studied even went some days without sleeping at all.
Rhino herds defecate in giant, shared dung piles called midden, then they stick their noses in the stuff. Here's why.
The feral pig population in the U.S. is a growing issue in nearly 40 states. The USDA hopes to wipe out the billion-dollar problem within a decade.
Each year, hundreds of healthy whales end up stranded on beaches, and scientists are investigating what could be behind the phenomenon.
House cats seem to love chasing laser pointers. But what about their larger, wilder cousins?
If you look outside your window right now, you'll probably see one running up a tree or checking you out. How did the squirrel get so commonplace?
Only three mammal species on Earth lose the ability to reproduce during middle age. Killer whales, like us, are one of that select group. But why?
After losing part of her foot to a snare, the 6-month-old elephant named Clear Sky has to learn how to walk again.
Ring-tailed lemurs — perhaps the most iconic species on the tropical island of Madagascar — are in significant decline due to habitat loss, hunting and illegal capture.
Zookeepers in Europe feed their elephants surplus holiday foliage, giving the animals a treat they both eat and play with.
Thanks to the humanlike pitch awareness of these adorable primates, researchers have more insight into how sound is processed in the brain.
Turns out the reboot of 'Planet of the Apes' got one thing right — it's the brains monkeys lack, not the anatomy.
One Finnish town is trying out an unconventional method for protecting their pets from protected wolves.
They're dirty, hairy, mangy-looking creatures — and they giggle and squirm when tickled, just like us.
Who doesn't love a farsighted ape wearing reading glasses?
It turns out that one of the world's most enchanting animals has even stronger superpowers than we previously knew. Surprise!
Yes, these nocturnal mammals can fly faster than our most beloved speedy birds. And they beat the record by a long shot.
Yep, these adorable Seussian misfits play a key role in the local environment.
More than 180 countries signed a new agreement to combat trade of the pangolin—the most critically endangered animal you've never heard of. Will it be enough?