Fossil footprints show humans in North America more than 21,000 years ago
Published
Fossil footprints show humans in North America more than 21,000 years ago, the earliest firm evidence for humans in the Americas and...
Full ArticlePublished
Fossil footprints show humans in North America more than 21,000 years ago, the earliest firm evidence for humans in the Americas and...
Full ArticleScientists at the US Geological Survey have uncovered evidence of a firm time and location
Researchers once thought humans couldn't have migrated down from Siberia into North America during the last ice age. New findings..