asteroid on it's way, page-2

50 metres wide.
hypothetically (we hope) what sort of damage would that do if it hit earth-how big was the asteroid that became the tertiary event (yucutan) which triggered the dinosaur extinction?
if it came close, would bruce willis head up there with his cohorts, and save us- or is it a bit difficult to land on.lol
they say that asteroids are potentially full of valuable mineral deposits- bet its nickel!!everyones got some!
perhaps thats where prw,s lost rig is ...
have a great weekend!