Mammals
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.
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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.
By Alia Hoyt
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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
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.
By Carrie Tatro
It pays to be brainy when you're a ring-tailed lemur.
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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.
By Carrie Tatro
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.
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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.
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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.
A new scientific study reveals that the smells unique to meerkat communities aren't produced by the meerkats themselves.
By Chris Opfer
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A new genetic analysis clarifies the evolutionary relationships between five modern and extinct elephant species.
Despite our best efforts at eradicating them, rats keep outsmarting us. Here's how.
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.
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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.