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.
A strange evolutionary plot twist has been uncovered in the search for why elephants rarely get cancer.
A mother orca spent more than two weeks clinging to her dead calf. But why?
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.
Is it a whale ... a dolphin? Is it a whale-pin?
The Humboldt marten was thought to be extinct until it was rediscovered in 1996. Now it is threatened again.
Breaking news: Dolphins and porpoises don't actually look very much alike.
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.
Could such a simple change make a major impact? A new study says it's possible.
Once you accept squirrels aren't going anywhere, you can apply a more creative approach to keeping the critters away from your prized tomatoes.
Think your bed is cleaner than a chimp's? Researchers at North Carolina State University set out to find the answer.
Koala populations in Australia are in decline, in part due to the ravages of chlamydia, a sexually transmitted bacterial infection.
It pays to be brainy when you're a ring-tailed lemur.
The platypus may look a bit absurd and bizarre, but its milk might hold the secret to fighting antibiotic-resistant bacteria.
Nutria are jumbo-sized rodents that reproduce and eat at a jumbo-sized pace.
Urban coyotes have a fierce and formidable reputation as midnight predators, but coexistence with humans is possible.
Naked mole rats are famous for their longevity, but they also don't age like the rest of us do.
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.
Why do squirrels exhibit behavior that can get them killed by cars? And how can you avoid them?
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.
A new study, along with previous research, suggests squirrels use mnemonic strategies to remember where they put the good nuts.
Today, horses have one huge toe on each leg — but they weren't always that way. Why the single digit now?
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.
Thanks to the excesses of narcoterrorist Pablo Escobar, Colombian waterways now house a population of these invasive African giants.
Sure, these mammals may be cute and cuddly. But that doesn't mean their bite can't pack a punch.
By frightening top predators, the fear of humans may be distorting ecosystem processes even more than previously imagined.