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.
Pablo Escobar's Escaped Hippos Now Roam Wild in Colombia Rivers
Brazilian Free-tailed Bats Are Way Faster Than We Thought
Jia Jia, the World's Oldest Giant Panda, Has Died
Fear of the Human 'Superpredator' Causes Large Carnivores to Eat Less
New Research Helps Confirm Why Horses Have Single-toed Hooves
Kangaroo Anthropomorphism Crushed by Mother Nature
Orangutans Can Nurse for 20 Percent of Their Lives
Rats Are Little Geniuses
Hedgehog Balloon Syndrome Sounds Adorable, Can Be Deadly
Rising sea levels wiped out the entire population of a rodent species only found on remote Australian island Bramble Cay. Who's next?
By Christopher Hassiotis Jun 20, 2016
The population-control strategy to rid the islands of the invasive species would use something called "gene driving" and GMO rodents.
By Chris Opfer Jun 17, 2016
Orcas have culture, just like humans do. And that culture can influence their evolution.
By Patrick J. Kiger Jun 9, 2016
The baby camel is definitely cuter than his namesake, don't you think? No word yet on how Alexander Camelton feels about Federalism.
By Allison Loudermilk Jun 8, 2016
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.
By Christopher Hassiotis May 2, 2016
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.
By Christopher Hassiotis Apr 18, 2016
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.
By Jesslyn Shields Apr 1, 2016
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?
By Jesslyn Shields Mar 31, 2016
Researchers developed technology that allows monkeys to maneuver around in robotic wheelchairs, using only their thoughts to navigate. That has implications for humanity.
By Patrick J. Kiger Mar 21, 2016
The current orcas residing at SeaWorld will be the last generation housed there.
By Kate Kershner Mar 21, 2016
Feral monkeys have roamed Silver Springs State Park in Florida since the 1930s.
By Karen Kirkpatrick Mar 1, 2016
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.
By Christopher Hassiotis Feb 25, 2016
A study finds wolves howl differently depending on the species.
By Karen Kirkpatrick Feb 22, 2016
"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.
By Jesslyn Shields Feb 9, 2016
Motion-sensing cameras, detailed maps and a special poop-detecting dog all played a part in finding the jaguar nicknamed "El Jefe."
By Christopher Hassiotis Feb 3, 2016
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.
By Jesslyn Shields Jan 28, 2016
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.
By Sarah Gleim Jan 27, 2016
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.
By Karen Kirkpatrick Jan 25, 2016
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.
By Christopher Hassiotis Jan 22, 2016
Groups of European bison make movement and grazing decisions by popular vote, choosing to follow or ignore potential leaders' suggestions.
By Laurie L. Dove Jan 19, 2016
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.
By Robert Lamb Jan 15, 2016
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?
By Karen Kirkpatrick Nov 17, 2015
A new study shows how animal's pupils have evolved to help them survive in their ecological niche as predator or prey.
By Karen Kirkpatrick Nov 3, 2015
Can endangered species be saved with insemination from the Great Beyond?
By Alia Hoyt Sep 15, 2015
Creatures from pachyderms to bees are better than humans at detecting scents.
By Patrick J. Kiger Sep 15, 2015
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