Arthur Bloch

I always get asked for suggestions on what to get food-lover friends. While there are many gifts out there that a foodie would love, it's always good to do some research beforehand so you know you're getting a gift that will last.

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.