The first colony on Mars is not going to be built by a private company. How are you going to make money? You're not.

It makes good sense to revere the sun and the stars ... because we are their children

In the first year of a child's life we teach them to walk and talk. And then for the rest of their lives we want them to sit down and be quiet.

If your belief system is not founded in an objective reality, you should not be making decisions that affect other people.

Exploration is what you do when you don't know what you're doing. That's what scientists do every day. If a scientist already knew what they were doing, they wouldn't be discovering anything, because they already knew what they were doing.

If each dead person became a ghost, there'd be more than 100 billion of them haunting us all. Creepy, but cool.

I've accomplished enough in life so that I do not fear death.