Once we open the door to the plutonium economy, we expose ourselves to absolutely terrible, horrifying risks from these people.

For how many people do you think might yet stand on this planet before the sun grows cold? That's the responsibility we hold in our hands.

It's like turning the space program over to the Long Island Railroad.

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

Polite conservationists leave no mark save the scars upon the Earth that could have been prevented had they stood their ground.

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

To me, a wilderness is where the flow of wildness is essentially uninterrupted by technology; without wilderness the world is a cage.