Ancient Teeth Show Earlier Human Life in Rainforests

People adapted to living in tropical rainforests thousands of years earlier than previously known, say scientists who found crucial evidence in 20,000-year-old fossilized human teeth discovered in Sri Lanka. The researchers said there has been a debate about when our species began living in rainforests, with some experts arguing such habitats may have been too daunting for early human hunter-gathers. In a study published Thursday in the journal Science, the scientists examined teeth...

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