The space rocks argon
This article doesn't say how large the boulders are. Will they just provide pretty blinkenlights as they fall from the sky or will there be a big KABOOM? At least they are good at absorbing impact, so we won't have to. I just watched a whole lot of UnchartedX on YouTube about the Younger Dryass impact, etc. I want to know if it will be necessary to start building all sorts of big and weird granite stuff for future civilizations to find after ours is wiped out?