At Tanque Loma, at least 22 giant ground sloths in the genus Eremotherium met their end. Of the five hypotheses that researchers proposed for what killed the sloths, the best supported one right now is that they died surrounded by their...

Sloths have been on this planet for more than 40 million years. What's the secret to their success? In a hilarious talk, zoologist Lucy Cooke takes us inside the strange life of the world's slowest mammal and shows what we can learn from...

Before she left for Chicago, Emily Graslie of The Brain Scoop sat down with Hank to discuss one of her favorite skulls from the from the Philip L. Wright Zoological Museum. Then Jessi Knudsen Castañeda from Animal Wonders joined in with...

Who wants to be a biologist? Learn all about scientists who study life -- like where they do their jobs, the questions they ask, and the tools they use!

Sometimes it seems like the past favored large animals, but it turns out that each one on this list has a different reason for its size.

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From the world’s biggest land animal to a creature built more like a tank than a sub, meet seven mammals that you might not think can swim well, but do!

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Sloths might be slow and spend much of their time sleeping, but they’re definitely not boring. Jessi shares three weird facts about sloths!

New ReviewLearn some wild facts about sloths, the world's slowest mammal.

Learn where their name comes from.

Some lesser-known facts about these fascinating creatures.

See Magica the sloth climb around as she's being trained to move through her enclosure and into her "taxi" for safe travel.

These omnivorous creatures aren't related to the sloth... they actually move faster than a human!

Sloths are truly fascinating creatures.

See Magica the sloth climb around as she's being trained to move through her enclosure and into her "taxi" for safe travel.

For an animal with "sloth" in its name, this funny-looking bear can be pretty quick.

Learn some wild facts about sloths, the world's slowest mammal.

See Magica the sloth climb around as she's being trained to move through her enclosure and into her "taxi" for safe travel.

Did you know sloths sleep for 18-20 hours a day?

We all know sloths are the slowest animals on Earth - but that's only the start of what makes these creatures incredibly fascinating.

Learn where their name comes from.

Some lesser-known facts about these fascinating creatures.

Did you know sloths sleep for 18-20 hours a day?

Did you know sloths sleep for 18-20 hours a day?

See Magica the sloth climb around as she's being trained to move through her enclosure and into her "taxi" for safe travel.