Although I cannot move, and I have to speak through a computer, in my mind, I am free.

Our population and our use of the finite resources of planet Earth are growing exponentially, along with our technical ability to change the environment for good or ill.

I'm not afraid of death, but I'm in no hurry to die. I have so much I want to do first.

God not only plays dice, he throws them in the corner where you can't see them.

I am discounting the reports of UFOs. Why would they appear only to cranks and weirdos?

Some people would claim that things like love, joy and beauty belong to a different category from science and can't be described in scientific terms, but I think they can now be explained by the theory of evolution.

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