News in Brief Archaeology

Ancient South American populations dipped due to an erratic climate

Hunter-gatherers declined when weather patterns became unpredictable 8,600 years ago

wet weather

WEATHER WOES  Extreme, unpredictable wet and dry spells led to big population declines among foragers living in the Amazon and other parts of South America around 8,600 to 6,000 years ago, a study concludes.

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By Bruce Bower

- More than 2 years ago

Ancient South American populations declined sharply as rainfall became increasingly unpredictable starting around 8,600 years ago, researchers say.