New discoveries from several archaeological sites in North and South America suggest that ancient people first arrived in the ...

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

Sloths like these once lived from Alaska to Argentina, and some species had bony structures on their backs, called osteoderms — a bit like the plates of modern armadillos — that may have been ...

Sloths like these once lived from Alaska to Argentina, and some species had bony structures on their backs, called osteoderms - a bit like the plates of modern armadillos - that may have been used ...

Sloths like these once lived from Alaska to Argentina, and some species had bony structures on their backs, called osteoderms — a bit like the plates of modern armadillos — that may have been ...

Sloths like these once lived from Alaska to Argentina, and some species had bony structures on their backs, called osteoderms – a bit like the plates of modern armadillos – that may have been ...