One trait stands out in nearly all meteorites: metal; they've got it. So, the best way to find a meteorite is to hear it first.

I want to create the airplane that flies in the rarified atmosphere of Mars. This is what galvanizes a generation to want to become scientists and engineers in the first place, not we need a scientist to develop a plane that's 20 percent more fuel-efficient than the one your parents flew.

Space exploration is a force of nature unto itself that no other force in society can rival.

The typical person has no trouble believing without knowing. What people need to realize is simply that you do not need to believe to know.

Do you realize that if you fall into a black hole, you will see the entire future of the Universe unfold in front of you in a matter of moments and you will emerge into another space-time created by the singularity of the black hole you just fell into?

The theory of evolution, like the theory of gravity, is a scientific fact.

How much would you pay...for the Universe?