Archaeologists in South Carolina say they have uncovered evidence that shows humans lived in North America at least 50,000 years ago, much earlier than the date accepted by other archaeologists.

Dr. Albert C. Goodyear and his team found artifacts they say are stone tools. The items were found in sediment dating back 50,000 years.

Other archaeologists greeted the claim with skepticism. They believe humans didn't arrive until about 13,000 years ago, citing projectile points found across the U.S.

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Team Says Humans Lived In North America Earlier (The Washington Post 11/18)
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Evidence Hints at Earlier Humans in Americas (The New York Times 11/18)
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New evidence puts man in North America 50,000 years ago (USC 11/17)