Hundreds gathered at the Woodland Park Zoo on Tuesday to break ground on its newest exhibit. Around 100 kids dug tiger-striped shovels into the ground at the zoo to start construction of the new $19.6 ...

Two sloth bear cubs were born at the National Zoo, which appears to be good news for this vulnerable species and perhaps bad news for the termites on which they dine. The births, which occurred Dec. 7 ...

Harlan’s ground sloth fossil skeleton excavated and displayed at the La Brea Tar Pits in Los Angeles. Larisa DeSantis Imagine a sloth. You probably picture a medium-size, tree-dwelling creature ...