What the heck is that thing?

In a clip from the recent BBC program Museum of Life, visitors to London’s Natural History Museum try to identify what kind of animal Megatherium was. Paleo fans will know it as one of the largest ground sloths to have ever lived (as well as one of the first to be described), but if I didn’t know that and had no background in paleo, I might think it was a dinosaur, too!