Don't tell me that man doesn't belong out there. Man belongs wherever he wants to go - and he'll do plenty well when he gets there.

Science does not have a moral dimension. It is like a knife. If you give it to a surgeon or a murderer, each will use it differently.

My friends they were dancing here in the streets of Huntsville when our first satellite orbited the Earth. They were dancing again when the first Americans landed on the Moon. I'd like to ask you, don't hang up your dancing slippers.

It was very successful, but it fell on the wrong planet.

A good engineer gets stale very fast if he doesn't keep his hands dirty.

In this modern world of ours many people seem to think that science has somehow made such religious ideas as immortality untimely or old fashioned. I think science has a real surprise for the skeptics. Science, for instance, tells us that nothing in nature, not even the tiniest particle, can disappear without a trace. Nature does not know extinction. All it knows is transformation. If God applies this fundamental principle to the most minute and insignificant parts of His universe, doesn't it make sense to assume that He applies it to the masterpiece of His creation, the human soul?

The logistic requirements for a large, elaborate mission to Mars are no greater that those for a minor military operation extending over a limited theatre of war.