Ice Age climate change did not pose significant challenges to first Americans, study suggests

Paleoindian groups occupied North America throughout the Younger Dryas interval, which saw a rapid return to glacial conditions approximately 11,000 years ago. Until now, it has been assumed that cooling temperatures and their impact on communities posed significant adaptive challenges to those groups. Two researchers suggest otherwise in their review of climatic and environmental records from this time period in continental North America.

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