The Younger Dryas was a period when glacial conditions returned across much of the Northern Hemisphere within about 1,000 years, coinciding with the disappearance of the Clovis people, mammoths, and giant bison.
Sources
- How Two Retirees' Amateur Archaeology Helped Throw ... (smithsonianmag.com)
- https://www.pnas.org/doi/10.1073/pnas.0706977104 (pnas.org)
- https://www.pbs.org/wgbh/nova/clovis/debate.html (pbs.org)
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