Christie Brinkley

My mom was always my biggest teacher, my inspiration, my role model. My mom was just the most amazing person. She was like a bon vivant in that she just lived each day to the fullest. As soon as I became a vegetarian, she became a vegetarian.

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.