Ancient sloths lived in trees, on mountains, in deserts, boreal forests and open savannahs. These differences in habitat are primarily what drove the wide difference in size between sloth species. But ...

Recent excavations in South America have unearthed a fascinating glimpse into the prehistoric world, revealing the existence of giant, elephant-sized sloths that once carved massive, 2000-foot-long ...

(The Conversation is an independent and nonprofit source of news, analysis and commentary from academic experts.) Imagine a sloth. You probably picture a medium-size, tree-dwelling creature hanging ...

Sloths weren't always slow-moving, furry tree-dwellers. Their prehistoric ancestors were huge - up to 4 tons - and when startled, they brandished immense claws. For a long time, scientists believed ...

In 1991, a skateboarder discovered 1.5-million-year-old giant ground sloth fossils in Wilmington, North Carolina. Scientists from the Smithsonian determined the fossils belonged to two different ...

(The Conversation is an independent and nonprofit source of news, analysis and commentary from academic experts.) Larisa R. G. DeSantis, Vanderbilt University and Aditya Reddy Kurre, University of ...