“The facts of the fossil record never justified denying poor people a healthy diet. The facts of the weather record do not justify denying poor people affordable energy. And no set of facts, whatever they may be, can justify denying scientists - or anyone else, for that matter - the right to free speech.”

American aerospace engineer and author

Robert Zubrin is an American aerospace engineer, author, and advocate for human exploration of Mars. He is known for arguing that space will shape future military and political power, and for making the case for a stronger American role in space. His writing often turns on Mars exploration and on the strategic importance of space. He has also argued that control of space will matter in future conflict, and that peace on Earth depends on preparing for war beyond it.