But then, there's a heck of a lot of those rocks out there too! And something people might not be aware of is..... if they hit..... are there going to be more than one? (probably?) Especially after the Kantekians left such a mess of their planet....
Incidentally, when the C's were asked "When did Kantek blow up?" , they said 80,000 years ago. Also when asked when did Venus come into our solar system, it was also 80,000 years ago.

I don't have the exact quotes, so sorry about that, but I do remember that number popped up twice. It's quite a coincidence.