Childbearing should be a punishable crime against society, unless the parents hold a government license. All potential parents should be required to use contraceptive chemicals, the government issuing antidotes to citizens chosen for childbearing.

There is no place where we can safely store worn-out reactors or their garbage. No place!

Understanding how DNA transmits all it knows about cancer, physics, dreaming and love will keep man searching for some time.

Apollo 13, as you may remember, gave us a reactor that is bubbling away right now somewhere in the Pacific. It's supposed to be bubbling away on the moon, but it's in the Pacific Ocean instead.

I believe in the rights of creatures other than man.

I believe that the average guy in the street will give up a great deal, if he really understands the cost of not giving it up. In fact, we may find that, while we're drastically cutting our energy consumption, we're actually raising our standard of living.

The wild places are where we began. When they end, so do we.