(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 ...

Long before today's tree-dwelling sloths became icons of leisure, their ancestors roamed the ground as colossal herbivores.

Baby animals are our favorite. Puppies, kittens, chicks, bunnies — the list goes on and on! And if you go to the Roger ...