No one is excluded from the astronaut corps based on penis size.

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.

But can you prove that, Dr. Crick?

We can study it, we can apply principles of peer-reviewed research, we can do it.' People say, 'Yes, we can figure it out.

Nobody ever sees the inside of their body, ... It's wild ... it's not nearly as orderly as you think it's going to be.

Dead people never seem to address the obvious - the things you'd think they'd be bursting to talk about, and the things all of us not-yet-dead are madly curious about, ... Such as: Hey, where are you now? What do you do all day? What's it feel like being dead? Can you see me? Even when I'm on the toilet? Would you cut that out?