Facts are true whether or not you believe them.

Perhaps we’ve never been visited by aliens because they have looked upon earth and decided there’s no sign of intelligent life.

Intelligent design is a philosophy of ignorance.

If you want a nation to have space exploration ambitions, you've got to send humans.

We need to look at NASA, not as a handout, but as an investment.

It's progress I think, that science has joined philosophy, metaphysics & religion as subjects drunk people argue about in bars.

As a child, I was aware that, at night, infrared vision would reveal monsters hiding in the bedroom closet only if they were warm-blooded. But everybody knows that your average bedroom monster is reptilian and cold-blooded.