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.
Why Are Orcas Attacking Boats? Experts Weigh In
Leopard Seals Are Apex Predators of the Antarctic
Humpback Whales Have Made an Amazing Comeback From Extinction
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
The Happiest Animal on Earth Is the Quokka
What Do Possums Eat? Most Things, It Turns Out
What's It Like Inside a Kangaroo's Pouch?
The Tarsier Is One Weird Primate, and Yes, We're Related
Marmosets Are Tiny, Upper Canopy-dwelling Monkeys
Why Do Gorillas Beat Their Chests?
Squirrels Can Be Left- or Right-handed
Rat vs. Mouse Identification: Which Is Eating Your Cheese?
Chipmunk vs. Squirrel Sizes, Habitats and Characteristics
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 8
Late-stage albinism? Disastrous paint spill? Marty McFly in giraffe form? Maybe the African mammal just has something in common with Michael Jackson.
Rising sea levels wiped out the entire population of a rodent species only found on remote Australian island Bramble Cay. Who's next?
The population-control strategy to rid the islands of the invasive species would use something called "gene driving" and GMO rodents.
By Chris Opfer
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In a surprising way, the Southeast Asian mammal, AKA the bearcat, creates a chemical compound shared with roasty, toasty human food, according to a new study.
Feral monkeys have roamed Silver Springs State Park in Florida since the 1930s.
As the climate changes, some pika populations may die out, but others will flourish. A new study examined what's likely to happen in eight U.S. National Parks.
"The Jinx." "Making a Murderer." And now, orangutans? Why this female-on-female ape killing took researchers by surprise — and reads like a human true-crime drama.
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Motion-sensing cameras, detailed maps and a special poop-detecting dog all played a part in finding the jaguar nicknamed "El Jefe."
What do bats have in common with ice skaters and one-legged ducks? The answer to that helped illuminate one perplexing thing about the flying mammals.
Breaking multiple records, Sarah set speeds never matched by any other animal. She was euthanized earlier this week by the staff at the Cincinnati Zoo, where she lived.
Groups of European bison make movement and grazing decisions by popular vote, choosing to follow or ignore potential leaders' suggestions.
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Pop culture has depicted chimps and other primates as both gun-wielding villains and saviors, but should humans be concerned about the possibility of armed apes?
Creatures from pachyderms to bees are better than humans at detecting scents.
Some bats are messing with their neighbor's sonar to throw them off the track of food.
Bats can spread deadly human diseases. Join Lauren as she interviews a virologist about the powerful immune systems of these fascinating creatures of the night.
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Afraid your formerly humble bonfire has grown a little out of control? Never fear: Your trusty rhinoceros firefighters brigade should be along to stomp it out at any moment. At least, that's the legend. But is there any truth to it?
Cheetahs share so much DNA that they're practically clones of one another. But what does this mean for the future of the species?
By Bambi Turner
Monkeys share a lot in common with us, but are they just as superstitious? We know that have the ability to gamble, but is it deeper than just a game to them.
As fans of George R.R. Martin's "Song of Ice and Fire" series know all too well, a person encountering a dire wolf will likely end up in dire straits. But while these fearsome beasts make for great fiction, do they have any grounding in reality?
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Ah, the duckbill platypus: the creature so strange it's said to be cobbled together from a bin of spare animal parts. With its odd appearance -- and even odder abilities -- it's no surprise the creature was once dismissed as an elaborate hoax.
If a massive whale washed up on your beachfront, you'd think that the bulk of the problem would be ... well, its bulk. But if you were covered in decomposing whale guts, you'd think differently.
The bunny has long been associated with Easter. How did our hopping friend land this distinction?
Learn all about tigers with these HowStuffWorks Tiger Facts!
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Like most mammals, this female gorilla has four limbs and a strong skull to protect its large brain. As well, its thoracic cavity contains a four chambered heart and a pair of lungs.
Like other marmots is alpine marmots are social creatures found in groups of ten to fifteen. But the population of marmots is declining due to the spread of agriculture.