New research from several sites is starting to suggest that people came to the Americas earlier — perhaps far earlier — than ...

Fossils show humans coexisted with giant sloths and mastodons for thousands of years. Evidence includes modified sloth bones ...

"In the past 30 years ... where bones of giant ground sloths show signs of being manipulated by humans. Sloths like these once lived from Alaska to Argentina, and some species had bony structures ...