When the Sun shrinks to a dull red dwarf, it will not be dying. It will just be starting to live and everything that has gone before will merely be a prelude to its real history.

To find anything comparable with our forthcoming ventures into space, we must go back far beyond Columbus, far beyond Odysseus-far, indeed, beyond the first ape-man. We must contemplate the moment, now irrevocably lost in the mists of time, when the ancestor off all of us came crawling out of the sea.

I don't believe in God but I'm very interested in her.

A man who grows that much hair,' critics were fond of saying, 'must have a lot to hide.

I have great faith in optimism as a guiding principle, if only because it offers us the opportunity of creating a self-fulfilling prophecy.

Can the synthesis of man and machine ever be stable, or will the purely organic component become such a hindrance that it has to be discarded?

As three laws were good enough for Newton, I have modestly decided to stop there.