An illustration shows what Duonychus tsogtbaatari might have looked like. Unlike its therizinosaur brethren, the new species had only two claws instead of three. When Hokkaido University ...

By Jeanne Timmons Ground sloths emerged in South America tens of million years ago, eventually ranging as far north as Canada. While their modern relatives dwell in trees and top out at the size ...

Long before today’s slow-moving tree dwellers, sloths were towering giants. In this episode, we look back at the age of the giant ground sloth - massive creatures that once roamed the Americas, ...