BBC NEWS | Science/Nature | Footprints of 'first Americans': "Footprints of 'first Americans'
By Paul Rincon
BBC News science reporter
Footprint (LJM)
People left traces of their presence in the sediments of a shoreline
Human settlers made it to the Americas 30,000 years earlier than previously thought, according to new evidence.
A team of scientists came to this controversial conclusion by dating human footprints preserved by volcanic ash in an abandoned quarry in Mexico.
They say the first Americans may have arrived by sea, rather than by foot."
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