I would like nuclear fusion to become a practical power source. It would provide an inexhaustible supply of energy, without pollution or global warming.

In his eyes shone the reflection of the most beautiful planet in the Universe---a planet that is not too hot and not too cold; that has liquid water on the surface and where the gravity is just right for human beings and the atmosphere is perfect for them to breathe; where there are mountains and deserts and oceans and islands and forests and trees and birds and plants and animals and insects and people---lots and lots of people. Where there is life. Some of it, possibly, intelligent.

Our only chance of long-term survival is not to remain lurking on planet Earth, but to spread out into space.

If any one of about 40 physical qualities had more than slightly different values, life as we know it could not exist.

Unless mankind redesigns itself by changing our DNA through altering our genetic makeup, computer-genera ted robots will take over our world.

No one can resist the idea of a crippled genius.

When the going gets tough, the tough take a coffee break.