Reading computer manuals without the hardware is as frustrating as reading sex manuals without the software.

We seldom stop to think that we are still creatures of the sea, able to leave it only because, from birth to death, we wear the water-filled space suits of our skins.

The best proof of intelligent life in space is that it hasn't come here.

Our own grandchildren may demonstrate that-sometimes- Gigantic is Beautiful.

I'm sure we would not have had men on the Moon if it had not been for Wells and Verne and the people who write about this and made people think about it. I'm rather proud of the fact that I know several astronauts who became astronauts through reading my books.

Though the man-apes often fought and wrestled one another, their disputes very seldom resulted in serious injuries. Having no claws or fighting canine teeth, and being well protected by hair, they could not inflict much harm on one another. In any event, they had little surplus energy for such unproductive behavior; snarling and threatening was a much more efficient way of asserting their points of view.

Getting information from the internet is like getting a glass of water from the Niagara Falls.