It seems like a triumph for a cryptocurrency industry that has long sought mainstream acceptance: Top investors in one of ...

Scientists have analyzed ancient DNA and compared more than 400 fossils from 17 natural history museums to figure out how and why extinct sloths got so big.

Sloths have a reputation for being sluggish and slow, spending most of their lives dozing in trees, but a new study suggests ...

Sloth size and habitat shifted multiple times over the past 35 million years, but human hunting likely drove the slower, ...