Bill Cosby

As I have discovered by examining my past, I started out as a child. Coincidentally, so did my brother. My mother did not put all her eggs in one basket, so to speak: she gave me a younger brother named Russell, who taught me what was meant by 'survival of the fittest.'

Supplying fuel for a Mars expedition from the lunar surface is often suggested, but it's hard to make it pay off - Moon bases are expensive, and just buying more rockets to launch fuel from Earth is relatively cheap.