My father was a very good Boy Scout. He was very skilled with knots, and he showed me how to tie a bow tie.

There are just two people entitled to refer to themselves as "we"; one is the editor and the other is the fellow with a tapeworm.

There really is no such thing as race. We all came from Africa. We are all of the same stardust. We are all going to live and die on the same planet, a Pale Blue Dot in the vastness of space. We have to work together.

There's nothing I believe in more strongly than getting young people interested in science and engineering, for a better tomorrow, for all humankind.

Incidentally, the creationists that I've encountered diligently deny that our Earth's climate is being altered by people. This point of view and teaching is in absolutely no one's best interest. Here's hoping we can work together and preserve the Earth, for us - us humans.

Everyone, red state, blue state, everyone supports space exploration.

People and stars are made of the same stuff.