"You need propellants to accelerate toward Mars, then to decelerate at Mars, again to re-accelerate from Mars to Earth, and finally to decelerate back at Earth. Accordingly, the mass of these required propellants, in short, drives our need for innovative launch vehicles."

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What do I want? I want to accelerate my personal evolution. I want Spirit to assist me in a greater capacity. I want my body to regenerate itself. I want to emanate health. I am willing to give up difficulty so that I can be a living example of what humanity can be.

— Barbara Marciniak