Some, but not all, ancient humans reacted to a cooling event by migrating HENNING DALHOFF/SCIENCE PHOTO LIBRARY
Roughly 4000 years after the last glacial period, hunter-gatherers faced another bout of sudden climate change that forced them to rapidly adapt to a much colder world.
While not as frigid or long-lasting as the final stages of the last glacial period, which ended about 11,700 years ago, the 8.2 ka cooling event still caused temperatures to plummet by as much as 6掳C (10.8掳F) within decades. At the same time, a land mass the size of Scotland broke away from the Norwegian continental…
