Some of the tools found in a Mexican cave may be more than 30,000 years old.
Stone tools have been found in a cave in Mexico, suggesting that people lived in North America as early as 26,500 years ago – that is, much earlier than most scientists admit, a new study says.
Currently, the earliest known North American archaeological sites date from 15,000 to 17,000 years ago, noted anthropology Professor Tom Dillehay of Vanderbilt University in Nashville, Tennessee.
However, in the latest issue of the journal Nature, scientists reported on artifacts found in a mountain cave in the Mexican state of Zacatecas.
Ciprian Ardelean of the Autonomous University of Zacatecas and other scientists report that they have found stone tools and fragments from the manufacture of tools, the age of which they estimate as 26,500 years.
There are indications that some artifacts are more than 30,000 years old, but so far the evidence is not strong enough to say for sure, Ardelean added.