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Most archaeologists think the first Americans arrived by boat. Now, theyre beginning to prove it | Science | AAAS

ON CEDROS ISLAND IN MEXICO Matthew Des Lauriers got the first inkling that he had stumbled on something special when he pulled over on a dirt road here, seeking a place for his team to use the bathroom. While waiting for everyone to return to the car, Des Lauriers, then a graduate student at the University of California, Riverside, meandered across the landscape, scanning for stone tools and shell fragments left by the people who had lived on the island in the past 1500 years.