(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 ...

CC0 Usage Conditions ApplyClick for more information. In this video, learn why and how National Zoo keepers brush the teeth of their sloth bears. Afterward, watch ...

(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 ...