It is in the thirties that we want friends. In the forties we know they won't save us any more than love did.

America is a mistake, a giant mistake.

A pair of powerful spectacles has sometimes sufficed to cure a person in love.

Carl Sagan spoke fluently between biology and geology and astrophysics and physics. If you move fluently across those boundaries, you realize that science is everywhere; science is not something you can step around or sweep under the rug.

Whenever I write something, I always want to make sure that what I write is defensible.