So science needs to get off its big fat duff and start pushing asteroids away. Long live man!, right?
But wait! You can push asteroids out of our path until doomsday, but what's the point? The Andromeda Galaxy (M13 to anyone with a Celestron) is on a collision course. The astronomers KNOW this; It WILL hit the Milky Way; We live in the Milky Way; We will be extinctified!
So science needs to get off its big fat duff and start pushing GALAXIES away. If i may metaphor biologically... Picking off an occasional biting ant doesn't do you a bit of good if when you're done an elephant sits on your head.