"It is not often that a man is given the chance to make such a discovery."

"The universe is not benign."

"A theory that fits all the facts is bound to be wrong, as some of the facts will be wrong."

"The ultimate aim of the modern movement in biology is in fact to explain all biology in terms of physics and chemistry."

"It is not the strongest of the species that survives, nor the most intelligent that survives. It is the one that is most adaptable to change."