“Space architectures capable of supporting a permanent human presence on Mars are extraordinarily complex, with many different interdependent systems.”

“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...”

“Mars is much closer to the characteristics of Earth. It has a fall, winter, summer and spring. North Pole, South Pole, mountains and lots of ice. No one is going to live on Venus; no one is...”

“Two things are infinite: the universe and human stupidity; and I'm not sure about the universe.”

“I'm selfish, impatient and a little insecure. I make mistakes, I am out of control and at times hard to handle. But if you can't handle me at my worst, then you sure as hell don't deserve me...”

“You've gotta dance like there's nobody watching, Love like you'll never be hurt, Sing like there's nobody listening, And live like it's heaven on earth.”

“So many books, so little time.”

“You know you're in love when you can't fall asleep because reality is finally better than your dreams.”

“The person, be it gentleman or lady, who has not pleasure in a good novel, must be intolerably stupid.”