Sexual desire is a state not unlike hunger.

In my experience, the most staunchly held views are based on ignorance or accepted dogma, not carefully considered accumulations of facts. The more you expose the intricacies and realtities of the situation, the less clear-cut things become.

You won't see me writing about particle physics, or even planetary geology, or chemistry. I practically failed chemistry, and if I had to write a book in any of those areas, I don't think it would go well.

In 'Packing for Mars,' I tried to convey the importance of getting young people interested in science.

Wisdom comes with age, but keep it to yourself.

To me, NASA is kind of the magical kingdom. I was sort of a geek, and you go there, and there are just these wondrously strange things and people.

Softball is the reason Washing Machines and Bleach are so popular. Don't think so? Just ask a softball Mom.