Traces of some of South America’s earliest people found under ancient dirt pyramid

The Huaca Prietans managed to do all this with surprisingly simple stone tools. Instead of complex spear points, they used flakes knocked off round beach stones for everything from prying open shellfish to cutting up plants. Theyre like disposable razors, says Matthew Des Lauriers, an archaeologist at California State University in Northridge, who has found the same kind of tools on Cedros Island off Baja California, where people lived more than 12,000 years ago. The similar tools could be evidence for the very first coastal migration, he says. But the only way to know for sure is to find more coastal sites.

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