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Did a comet end the Ice Age and wipe out a civilization? Fact check | Ancient Origins
The Younger Dryas cold spell, dated by counted Greenland ice layers, and the platinum spike at its start are Established. Whether a comet caused the cooling, wildfires and extinctions is Disputed: its proponents keep publishing evidence, and critics including a 13-author review in 2023 reject it. A comet that ended the Ice Age is Fringe, because the Ice Age ended about 1,200 years after the proposed impact. Graham Hancock's civilization wiped out at that time is Unverified.
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