I was proposing a topic for RV that interests me on another board here - namely the Asteroid Research Group's hypothesis that the Younger Dryas cooling event was caused by an asteroid strike. And then it struck me that in the Tunguska, Exodus and Oumuamua RV sessions a piece of space rock was directed by an external influence to achieve an outcome. CB's analysis in both Oumuamua and Tunguska proposed the possible usefulness of using space debris to disguise an attack. This set me to wondering whether the Younger Dryas impact - if indeed it really happened that way - was an intentional assault on an Earth civilisation of 12,800 years ago that somebody wanted to wipe out or merely an unfortunate collision.