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.
Leopard Seals Are Apex Predators of the Antarctic
With Fewer Than 10 Left, Can the Vaquita Be Saved?
Humpback Whales Have Made an Amazing Comeback From Extinction
Baby Bats Babble With Moms, Hinting at Human Language Development
Fruit Bats Are the Best Pollinators (and Suppliers of Tequila)
Brazilian Free-tailed Bats Are Way Faster Than We Thought
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)?
Dik-dik: The Tiny Antelope With the Embarrassing Name
Are Mules, Burros and Jackasses All Donkeys?
Tapir: The Ancient Fruitarian With the Tiny Trunk
What's It Like Inside a Kangaroo's Pouch?
Do Kangaroos Really Box?
The Smiley Quokka Is an Australian Super Survivor
The Tarsier Is One Weird Primate, and Yes, We're Related
Marmosets Are Tiny, Upper Canopy-dwelling Monkeys
Why Do Gorillas Beat Their Chests?
How Long Do Squirrels Live?
'Splooting': It's What All the Cool Squirrels Are Doing This Summer
Squirrels Get Jacked During Hibernation; No Weights Needed!
World's Largest Wolves by Weight: The Mighty and the At-Risk
The Pink Fairy Armadillo Is as Mystifying as Its Name
The Coatimundi Is Cute But Doesn't Make a Good Pet
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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
The platypus may look a bit absurd and bizarre, but its milk might hold the secret to fighting antibiotic-resistant bacteria.
Why do squirrels exhibit behavior that can get them killed by cars? And how can you avoid them?
By Jamie Allen
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.
Fall is in full swing and that means squirrels are busy hoarding nuts for winter. So how do they remember where they buried them? Research suggests they use mnemonic strategies.
By Jamie Allen
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.
By frightening top predators, the fear of humans may be distorting ecosystem processes even more than previously imagined.
A new scientific study reveals that the smells unique to meerkat communities aren't produced by the meerkats themselves.
By Chris Opfer
A new genetic analysis clarifies the evolutionary relationships between five modern and extinct elephant species.
We've learned that young orangutans nurse for much longer than any other mammal, knowledge which could help conservation efforts.
It's the first evidence researchers have of the whales using their "unicorn horns" to capture prey.
Deprived of oxygen, naked mole rats can alter their metabolic functions to something less mammalian and more plantlike, burning fructose instead of glucose.
It's like the movie "Groundhog Day" every April, but with hibernation, a smaller rodent and way more hormones.
Rhino herds defecate in giant, shared dung piles called midden, then they stick their noses in the stuff. Here's why.
House cats seem to love chasing laser pointers. But what about their larger, wilder cousins?