The most provocative candidate for the continent’s oldest evidence of human activity comes from the Santa Elina rock shelter in Mato Grosso, central Brazil. There, researchers reported the presence ...

Long before modern sloths became slow-moving tree dwellers, their ancestors were enormous ground beasts. These ancient sloths stood as tall as elephants and weighed several tons. Fossil evidence shows ...

Mexican scientists said Wednesday they have discovered the fossilized remains of a previously unknown species of giant sloth that lived 10,000 years ago and died at the bottom of a sinkhole. The ...

(Phys.org) —A team of researchers from the Sorbonne Universités have found evidence of an ancient sloth returning to the sea to survive. In their paper published in Proceedings of the Royal Society B: ...

The northern and southern maned sloths may look very similar from the outside, but their genomes reveal different stories: The two species have faced very distinct conditions in Brazil's Atlantic ...

Mexican scientists said Wednesday they have discovered the fossilized remains of a previously unknown species of giant sloth that lived 10,000 years ago and died at the bottom of a sinkhole. The ...

"Hearst Magazines and AOL may earn commission or revenue on some items through these links." Figuring out when exactly humans first reached South America increasingly depends on how you—read the bones ...