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
Squirrels Are Hardwired to 'Dance' When a Car's Coming
Hedgehog Balloon Syndrome Sounds Adorable, Can Be Deadly
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
Thanks to the excesses of narcoterrorist Pablo Escobar, Colombian waterways now house a population of these invasive African giants.
By Jesslyn Shields Jul 27, 2017
Sure, these mammals may be cute and cuddly. But that doesn't mean their bite can't pack a punch.
By Kate Kershner Jul 25, 2017
By frightening top predators, the fear of humans may be distorting ecosystem processes even more than previously imagined.
By Jesslyn Shields Jun 28, 2017
A new scientific study reveals that the smells unique to meerkat communities aren't produced by the meerkats themselves.
By Chris Opfer Jun 19, 2017
A new genetic analysis clarifies the evolutionary relationships between five modern and extinct elephant species.
By Jesslyn Shields Jun 12, 2017
Despite our best efforts at eradicating them, rats keep outsmarting us. Here's how.
By Melanie Radzicki McManus Jun 7, 2017
We've learned that young orangutans nurse for much longer than any other mammal, knowledge which could help conservation efforts.
By Jesslyn Shields May 24, 2017
It's the first evidence researchers have of the whales using their "unicorn horns" to capture prey.
By Kate Kershner May 16, 2017
Humans may not be the only animals that dig a soothing whiff of lavender oil.
By Tracy Staedter May 3, 2017
Deprived of oxygen, naked mole rats can alter their metabolic functions to something less mammalian and more plantlike, burning fructose instead of glucose.
By Jesslyn Shields Apr 25, 2017
It's like the movie "Groundhog Day" every April, but with hibernation, a smaller rodent and way more hormones.
By Jesslyn Shields Apr 5, 2017
Officials are building bridges and underpasses to help animals safely cross busy roadways, which keeps the motorists and crossing creatures out of harm's way.
By Shelley Danzy Mar 28, 2017
Scientists hope to eliminate need for tagging, extend system to other wild animals.
By Melanie Radzicki McManus Mar 10, 2017
The two elephants studied even went some days without sleeping at all.
By Kate Kershner Mar 9, 2017
Rhino herds defecate in giant, shared dung piles called midden, then they stick their noses in the stuff. Here's why.
By Jesslyn Shields Mar 3, 2017
The feral pig population in the U.S. is a growing issue in nearly 40 states. The USDA hopes to wipe out the billion-dollar problem within a decade.
By Melanie Radzicki McManus Feb 13, 2017
Each year, hundreds of healthy whales end up stranded on beaches, and scientists are investigating what could be behind the phenomenon.
By Laurie L. Dove Feb 13, 2017
House cats seem to love chasing laser pointers. But what about their larger, wilder cousins?
By Laurie L. Dove Jan 27, 2017
If you look outside your window right now, you'll probably see one running up a tree or checking you out. How did the squirrel get so commonplace?
By Kathryn Whitbourne Jan 20, 2017
Only three mammal species on Earth lose the ability to reproduce during middle age. Killer whales, like us, are one of that select group. But why?
By Jesslyn Shields Jan 12, 2017
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