Sloths weren't always slow-moving, furry tree-dwellers. Their prehistoric ancestors were huge—up to 4 tons (3.6 metric ...

In the past 30 years ... as well as similar-aged tracks of giant mammals. But some archaeologists say it’s hard to imagine that humans would repeatedly traverse a site and leave no stone ...

A giant anaconda, a vampire hedgehog, a dwarf squirrel, and a tiger cat were among the new species named by science in 2024.

"In the past 30 years ... where bones of giant ground sloths show signs of being manipulated by humans. Sloths like these once lived from Alaska to Argentina, and some species had bony structures ...

(Águeda Vilhena Vialou, Denis Vialou via AP) In the past 30 years ... similar-aged tracks of giant mammals. But some archaeologists say it’s hard to imagine that humans would repeatedly ...