Newly excavated tools suggest humans lived in North America at least 30,000 years ago
Artefacts from central Mexico cave are strong evidence humans lived on continent 15,000 years earlier than previously thought
Tools excavated from a cave in central Mexico are strong evidence that humans were living in North America at least 30,000 years ago, some 15,000 years earlier than previously thought, scientists said on Wednesday.
The artefacts, showed human occupation of the high-altitude Chiquihuite cave over a 20,000-year period, they reported in
