An Ice Age giant was tumbling around North America during the Late Pleistocene. About the size of a bear, it was actually a kind of enormous sloth that had evolved to thrive in freezing conditions. The rest of this article is behind a paywall. Please sign in or subscribe to access the full content.

Known as Jefferson’s ground sloth ( Megalonyx jeffersonii ), it was named in honor of Thomas Jefferson who first presented its remains in 1797 (though we didn’t know exactly what it was back then). Now, you can see these ancient creatures in action in Prehistoric Planet: Ice Age .

This winter, the series will transport us millions of years beyond the extinction of the dinosaurs to an Earth gripped by ice. The series will premiere on Apple TV on November 26, but a new clip shows a playful

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