Imagine a sloth. You probably picture a medium-sized, tree-dwelling creature hanging from a branch. Today's sloths—commonly featured on children's backpacks, stationery and lunch boxes—are slow-moving ...

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 ...

For a listing and recovery biologist, it was just a regular day. United States Fish and Wildlife Service's Luke Pearson was recently doing field research in Northeast Mississippi on a species of ...

(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 ...

(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 ...