So to solve this quandary of the two force peaks what I think was going on is that first impact is actually the limb hitting the load cell, and the second impact is actually the collapse of the cavitation bubble.

And you can hit it again. That's kind of ham fisted. You might just push it into a third keyhole or whatever, so you don't do that.

But when I was here, a lot of my fellow teenagers were in a very different situation, leaving school at a time then of rapidly growing youth unemployment, and essentially hitting a brick wall in terms of their opportunities.

But we can learn to land on these asteroids that have our name on them and put something like a small ion propulsion motor on it, which would gently, slowly, after a period of time, push it into a different trajectory, which, if we've done our math right, would keep it from hitting Earth.