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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Goodbye, Melomys: Climate Change Claims Its First Mammal Species

Rising sea levels wiped out the entire population of a rodent species only found on remote Australian island Bramble Cay. Who's next?

To Save the Galapagos Islands, We May Need to Modify Rat DNA

The population-control strategy to rid the islands of the invasive species would use something called "gene driving" and GMO rodents.

Orcas Altered Their Own Evolution

Orcas have culture, just like humans do. And that culture can influence their evolution.

Alexander Camelton, the Baby Camel Taking the Internet by Storm

The baby camel is definitely cuter than his namesake, don't you think? No word yet on how Alexander Camelton feels about Federalism.

Why There Are More Sumatran Orangutans Than We Previously Thought

The good news is that new research expands the orangutan count, but the bad news is that it's not because the population has grown.

Binturongs Smell Like Hot, Buttery Popcorn — Now We Know Why

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.

Prairie Dogs Savagely Kill Squirrels to Eliminate the Competition

Prairie dogs are cute little vegetarians … who have no problem casually snapping the neck of a ground squirrel. And those that kill have another sexy benefit, too.

'Off Switch' for Appetite Accidentally Discovered in Brain Enzyme

Researchers at Johns Hopkins have stumbled upon a previously unknown type of brain cell that tells mice when to stop eating. Could that work for humans?

New Study: Monkeys Can Drive Robotic Wheelchairs Using Thought Control

Researchers developed technology that allows monkeys to maneuver around in robotic wheelchairs, using only their thoughts to navigate. That has implications for humanity.

SeaWorld Ends Orca Program

The current orcas residing at SeaWorld will be the last generation housed there.

There's a River Full of Monkeys in Florida — And Not in a Theme Park

Feral monkeys have roamed Silver Springs State Park in Florida since the 1930s.

Things Are Looking Up for the Adorable American Pika

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.

Decoding Wolf Dialects

A study finds wolves howl differently depending on the species.

Anatomy of an Orangutan Murder

"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.

The Only Wild Jaguar in the U.S. Has Finally Been Filmed

Motion-sensing cameras, detailed maps and a special poop-detecting dog all played a part in finding the jaguar nicknamed "El Jefe."

Climate Change Threatens Snow Bunnies, Making Camouflage a Liability

The white winter coat of a snowshoe hare protects it in the winter, but evolution can't keep up with a rapidly changing climate and shortening snowfalls.

Well, Yeah. Zebra Stripes Aren't for Hiding.

When it comes to zebras, humans have a lot of questions. Why can't we ride them? What are the stripes for? Turns out some scientists may have just answered that last one.

Scientists Solve the Weird Physics of How Bats Land Upside Down

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.

Sarah the Cheetah, the World's Fastest Land Animal, Has Died

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.

Bison Embrace Democracy, Often Following Female Leaders

Groups of European bison make movement and grazing decisions by popular vote, choosing to follow or ignore potential leaders' suggestions.

Kangaroo Anthropomorphism Crushed by Mother Nature

Once more, humanity's attempts to view other animals as human lands us in a difficult spot, as this week's widely circulated photo of a "grieving" kangaroo illustrates.

Should We Worry About Apes Learning to Use Handguns?

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?

It's the Eye of the Tiger… and the Gator, the Deer, the Housecat

A new study shows how animal's pupils have evolved to help them survive in their ecological niche as predator or prey.

Frozen Sperm Is Saving These Ferrets

Can endangered species be saved with insemination from the Great Beyond?

Elephants Can Learn to Sniff Out Landmines

Creatures from pachyderms to bees are better than humans at detecting scents.