Fossilized teeth from two ancient megafauna suggest they roamed Brazil 3,500 years ago. The find “opens the door to rewrite South American history.” ...

Thompson said that the sloth fossil adds one more piece to the still incomplete puzzle of ancient Santa Cruz, which would have had a coastline that was miles out from its current location.

Marianela Amaya and Marcelo Lima were taking a walk down Serena beach in Mar del Plata on Argentina’s Atlantic coast on Sunday when they came across the remains of a giant sloth, believed to be ...