i think we should discuss this after a comet hits the earth.
i think, in history, we had been hit before, ya, life on earth
still survived, not the whole earth will be destroy, but certainly
the impact will influence the earth axis, movement and thereby the
climate. So, we will go into another ice age, a dead planet kind of
thing, but beneath it, living organism still exist, and life will
strive again in a million year to come.
Life is make in a way, you won't know what the next second
bring, and that makes it interesting and wanted to go on, if we
knows what happen when a comet/asteroid hit, i think it is not so
interesting liao