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.
How Billie the Dolphin Taught Her Flippered Friends to Bust a Move
Brazilian Free-tailed Bats Are Way Faster Than We Thought
Fear of the Human 'Superpredator' Causes Large Carnivores to Eat Less
Goats Really Like it When You Smile at Them
Deadly Chlamydia Threatens Koalas Down Under
Your Bed Has More Poop Than a Chimp's
Don't Hate This Squirrel Because He's Beautiful
Zombie Gene Protects Elephants From Cancer
A dolphin named Billie learned a dolphin-show trick from some captive dolphins, taught her wild friends how to do it and started a fad.
By Jesslyn Shields Sep 11, 2018
The Indian giant squirrel is covered in flamboyant colors like orange, black and bright purple. But why?
By Jamie Allen Aug 31, 2018
Domesticated animals like dogs and horses are known to respond to human facial expressions, but a new study finds that goats also like it when we smile.
By Jesslyn Shields Aug 31, 2018
A strange evolutionary plot twist has been uncovered in the search for why elephants rarely get cancer.
By Jesslyn Shields Aug 24, 2018
A mother orca spent more than two weeks clinging to her dead calf. But why?
By Jesslyn Shields Aug 10, 2018
It used to be assumed that African bush elephants avoided the sound of an angry bee hive. Now researchers believe they have receptors to detect a bee's alarm pheromones.
By Jesslyn Shields Aug 2, 2018
Is it a whale ... a dolphin? Is it a whale-pin?
By Kristen Hall-Geisler Jul 31, 2018
The Humboldt marten was thought to be extinct until it was rediscovered in 1996. Now it is threatened again.
By Jesslyn Shields Jul 12, 2018
Breaking news: Dolphins and porpoises don't actually look very much alike.
By Jesslyn Shields Jun 28, 2018
Once a week or so, sloths climb down from their trees and poop on the ground. It feels so good, they do a little dance. But this time of pleasure is also a time of peril.
By Alia Hoyt Jun 27, 2018
Could such a simple change make a major impact? A new study says it's possible.
By Michelle Konstantinovsky Jun 20, 2018
Once you accept squirrels aren't going anywhere, you can apply a more creative approach to keeping the critters away from your prized tomatoes.
By Jamie Allen May 31, 2018
Think your bed is cleaner than a chimp's? Researchers at North Carolina State University set out to find the answer.
By Kristen Hall-Geisler May 22, 2018
Koala populations in Australia are in decline, in part due to the ravages of chlamydia, a sexually transmitted bacterial infection.
By Carrie Tatro May 21, 2018
It pays to be brainy when you're a ring-tailed lemur.
By Jesslyn Shields Apr 6, 2018
The platypus may look a bit absurd and bizarre, but its milk might hold the secret to fighting antibiotic-resistant bacteria.
By Jesslyn Shields Mar 22, 2018
Nutria are jumbo-sized rodents that reproduce and eat at a jumbo-sized pace.
By Jesslyn Shields Feb 27, 2018
Urban coyotes have a fierce and formidable reputation as midnight predators, but coexistence with humans is possible.
By Carrie Tatro Feb 8, 2018
Naked mole rats are famous for their longevity, but they also don't age like the rest of us do.
By Jesslyn Shields Feb 5, 2018
Some people mistakenly believe that if chimps are socialized from an early age, they're not a threat to humans. But these five families found out the hard way that chimps will always be chimps.
By Nathan Chandler
Why do squirrels exhibit behavior that can get them killed by cars? And how can you avoid them?
By Jamie Allen Oct 3, 2017
The first new rat species found in the Solomon Islands in 80 years has been uncovered. But due to deforestation of its habitat, very few may still exist.
By Jesslyn Shields Oct 2, 2017
A new study, along with previous research, suggests squirrels use mnemonic strategies to remember where they put the good nuts.
By Jamie Allen Sep 28, 2017
Today, horses have one huge toe on each leg — but they weren't always that way. Why the single digit now?
By Kate Kershner Aug 31, 2017
Due to a quirk in their anatomy, injured hedgehogs can experience skin inflating to the size of a basketball, which can be a painful and life-threatening development.
By Laurie L. Dove Aug 11, 2017
Nuclear Pasta Is the Super-Macaroni of the Universe
Weather and Climate: What's the Difference?
Burke and Hare: Murderers for Money and Science