[freebeard]

There is a series on Suspicious 0bservers about recurring cataclysms

12,000 Year Cycle

In Part 1 he talks about DDG/?q=heinrich+events

Heinrich Events | Encyclopedia.com
https://www.encyclopedia.com/earth-a...einrich-events
Heinrich events are episodes during which large numbers of icebergs are released by glaciers into the North Atlantic. More than half a dozen Heinrich events occurred during the last ice age, every 10,000 years or so from 135,000 to 12,000 years ago.

Humankind has survived a half-dozen similar events.