The Unexpected Ice Age
About 13,000 years ago, North America seemed to be thawing from a 2.6 million-year ice age. Then a strange phenomenon occurred. A huge swath of Earth was suddenly plunged back into the cold for 1,000 years. In this edition of SciShow, hosts Stefan Chin and Blake De Pastino explain how scientists discovered evidence of massive floods in the Pacific Northwest that contributed to this about-face.
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Posted in Dazzle Me with Science
