What is a scientist after all? It is a curious man looking through a keyhole, the keyhole of nature, trying to know what's going on.

I wake up saying, I'm still alive; a miracle. And so I keep on pushing.

And let us remember too that life, in its exuberance, always succeeds in overflowing the narrow limits within which man thinks he can confine it.

There is about as much educational benefit to be gained in studying dolphins in captivity as there would be studying mankind by only observing prisoners held in solitary confinement.

For most of history, man has had to fight nature to survive; in this century he is beginning to realize that, in order to survive, he must protect it.

When we return wild animals to nature, we merely return them to what is already theirs. For man cannot give wild animals freedom, they can only take it away.

The impossible missions are the only ones which succeed.