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Disputed finds put humans in South America 22,000 years ago

Brazilian site may have been home to people before the Clovis hunters

Stone tools unearthed at a Brazilian rock-shelter may date to as early as 22,000 years ago. Their discovery has rekindled debate about whether ancient people reached the Americas long before the famed Clovis hunters spread through parts of North America around 13,000 years ago.

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