Science does not know its debt to imagination.

The most remarkable discovery in all of astronomy is that the stars are made of atoms of the same kind as those on the earth.

NASA has spin-offs, and it's a huge and very impressive list, including accurate and affordable LASIK eye surgery.

I am not sure about Bill Nelson. I haven't heard him say, 'Let's junk the NASA plan to send humans to the moon.' He's not about to say that. That would not be very popular.

We build too many walls and not enough bridges.