The dinosaurs disappeared because they could not adapt to their changing environment. We shall disappear if we cannot adapt to an environment that now contains spaceships, computers - and thermonuclear weapons.
Arthur C. ClarkeOne of the great tragedies of mankind is that morality has been hijacked by religion.
Arthur C. ClarkeOne theory which can no longer be taken very seriously is that UFOs are interstellar spaceships.
Arthur C. Clarke