Caroline Buchanan

A female professional athlete has to have the whole package, as opposed to a guy who can just be good at sport. You have to have a job or go to uni or do three sports instead of one, you have to be a standout.

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.