In what sense is this article new, aside from tagging it with the name of a recent movie (which isn't really about asteroids at all, but an allegory about climate change). We know all that; the DART mission is already on its way to go test the theory.

I get the impression that they're doing something novel here; there's something about "bolide fragmentation". But that takes up about half a sentence in the abstract; everything else seems to be telling us what we already knew about the dangers of asteroids.

Can somebody give me a better abstract of their paper?