“Progress requires setbacks the only sure way to avoid failure is not to try. ”

“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 i...”

“The Orion capsule uses an escape system quite like that of the Apollo spacecraft in the 1960s and 70s: an 'escape tower' containing a solid-fuel rocket that will pull it up and away from Ares I in ...”

“Sometimes people wonder why aeroplanes are so cheap and rockets are so expensive. Even the most superficial comparison shows one obvious difference: aeroplane engines use outside air to burn their ...”

“Reusable rockets promise much easier testing because you should usually get them back, and you can debug as you go rather than having to get everything perfect the first time.”

“In 1960-61, a small group of female pilots went through many of the same medical tests as the Mercury astronauts and scored very well on them - in fact, better than some of the astronauts did.”

“There is nothing that teaches you more than regrouping after failure ad moving on. Yet most people are stricken wth fear. They fear failure so much that they fail.”

“Failure is when you stop trying to do something.So, if you want to succeed.Don't stop trying.”

“Society has failed its inhabitants, just as its inhabitants have failed society.”

“All serious daring starts from within.”

“I mean, death is a serious thing, certainly not to be sneezed at.”

“I mean, I'm very serious with my kids about them comprehending the intricacies of global finance.”

“Of all the rabbinic sages of antiquity, perhaps none was more influential or famous than Rabbi Akiva.”