When you think of sloths, you no doubt recognize them to be relatively small and harmless, but this is a far cry from the Megatherium ... This unique marsupial predator had a face that looked ...

Survival could be counted in minutes, with a deadly predator hiding behind every enormous Jurassic ... Biodiversity Heritage Library/Wikimedia Commons/CC BY 2.0 It is the sheer size of the megatherium ...