No communication technology has ever disappeared, but instead becomes increasingly less important as the technological horizon widens.

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.

Any path to knowledge is a path to God-or Reality, whichever word one prefers to use

The difference between machines and human beings is that human beings can be reproduced by unskilled labour.

I doubt if there is a single field of study so theoretical, so remote from what is laughingly called everyday life, that it may not one day produce something that will shake the world.

I'm sometimes asked how I would like to be remembered. I've had a diverse career as a writer, underwater explorer, space promoter and science populariser. Of all these, I want to be remembered most as a writer - one who entertained readers, and, hopefully, stretched their imagination as well.

I don't believe in astrology; I'm a Sagittarius and we're skeptical.