Category: sloth

For years, scientists didn’t know what caused mysterious cave networks in South America. In 2010, they learned that the caves were actually tunnels dug by ancient giant sloths.

An elephant-sized sloth existed and went extinct only 10,000 years ago. It was one of the largest land mammals, measuring up to 6m (20ft) and weighing 4 tons.

Photo : Nobu Tamura / wikipedia