New discoveries from several archaeological sites in North and South America suggest that ancient people first arrived in the New World much earlier than scientists once thought. (AP Video: Mary Conlon & Christina Larson)
Giant sloths and mastodons co-existed with humans for millennia in Americas, new discoveries suggest
New discoveries from several archaeological sites in North and South America suggest that ancient people first arrived in the New World much earlier than scientists once thought. (AP Video: Mary Conlon & Christina Larson)