New research painted a more accurate picture of the megafauna that spread widely around the Americas before they went extinct.

It was a European zoologist, George Shaw, who named the sloth bear for its long, thick claws and unusual teeth. He thought that the bear was related to the tree sloth due to these features," the ...

says Encar García, a conservationist. This unusual species, which is called the Hoffmann’s two-toed sloth, doesn’t hesitate to deploy teeth or its two large foreclaws when threatened.

The San Diego Zoo announced on Wednesday the results of a public poll that determines the names of two sloth bear cubs that were born back in December.