Originally Posted by
Bahamasflyer
Damn.....I didn’t think a few hundred meters was large enough. I would have thought at least a mile or more to cause a realistic chance of mass extinction!
We are lucky all the gas giants are in the outer solar system.
That might have caused some extinctions, but not humans. Might have set civilization back a few hundred years though.
Objects big enough to sterilize the planet are fortunately rare, and hopefully all in known orbits.