The fact that the climate is getting warmer doesn't scare me at all. There's no reason why one should be scared.

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

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.

Scientifically speaking, a butterfly is at least as mysterious as a superstring. When something ceases to be mysterious it ceases to be of absorbing interest to scientists. Almost all things scientists think and dream about are mysterious.

Science is a human activity, and the best way to understand it is to understand the individual human beings who practise it. Science is an art form and not a philosophical method. The great advances in science usually result from new tools rather than from new doctrines. ... Every time we introduce a new tool, it always leads to new and unexpected discoveries, because Nature's imagination is richer than ours.

I have the freedom to do what I want... bright people to talk to every day.

Life is nature's way to give mind oportunities it wouldn't otherwise had.