Nothing is boring if you look at carefully.

The technologies which have had the most profound effects on human life are usually simple.

The question that will decide our destiny is not whether we shall expand into space. It is: shall we be one species or a million? A million species will not exhaust the ecological niches that are awaiting the arrival of intelligence.

I am hoping that the scientists and politicians who have been blindly demonizing carbon dioxide for 37 years will one day open their eyes and look at the evidence.

The PhD system is the real root of the evil of academic snobbery. People who have PhDs consider themselves a priesthood, and inventors generally don't have PhDs.

The pain of childbirth is not remembered. It's the child that's remembered.

The purpose of thinking about the future is not to predict it but to raise people's hopes.