For NASA, space is still a high priority.

I hate facts. I always say the chief end of man is to form general propositions - adding that no general proposition is worth a damn.

Science is a first-rate piece of furniture for a man's upper chamber, if he has common sense on the ground floor.

If an elderly but distinguished scientist says that something is possible, he is almost certainly right but if he says that it is impossible, he is very probably wrong.

Inanimate objects can be classified scientifically into three major categories those that don't work, those that break down and those that get lost.