There is decent evidence recently on a possible astroid impact and massive "flood" overland tsunami from the Arctic. https://en.wikipedia.org/wiki/Younger_Dryas

There is decent evidence recently on a possible astroid impact and massive "flood" overland tsunami from the Arctic. https://en.wikipedia.org/wiki/Younger_Dryas_impact_hypothesis https://en.wikipedia.org/wiki/Younger_Dryas_impact_hypothesi...