“This is the last programme in this natural history, and it's very different from all the others because it's been devoted to just one animal: ourselves. And that may have been a very misleading thing to have done. It may have given the impression that somehow man was the ultimate triumph of evolution, that all those thousands of millions of years of development had no purpose other than to put man on Earth. There is no scientific evidence whatsoever for such a belief. No reason to suppose that man's stay on Earth should be any longer than that of the dinosaurs. He may have learned how to control his environment, how to pass on information from one generation to another, but the very forces of evolution that brought him into existence here on these African plains are still at work elsewhere in the world, and if man were to disappear, for whatever reason, there is doubtless somewhere some small, unobtrusive creature that would seize the opportunity and, with a spurt of evolution, take man's place. But although denying a special place in the world may be becomingly modest, the fact remains that man has an unprecedented control over the world and everything in it. And so, whether he likes it or not, what happens next is very largely up to him.”

Edwards v. Aguillard, 482 U.S. 578 (1987) (dissenting) http://www.belcherfoundation.org/edwards_v_aguillard_dissent.htm
Has been misleadingly quoted without Scalia's statements attributing the assertions to witness testimony paragraphs earlier, "Before summarizing the testimony of Senator Keith and his supporters, I wish to make clear that I by no means intend to endorse its accuracy... Senator Keith and his witnesses testified essentially as set forth in the following numbered paragraphs:", as in Michael Stone, " Scalia Commencement Speech Supports Young Earth Creationism http://www.patheos.com/blogs/progressivesecularhumanist/2015/06/scalia-commencement-speech-supports-young-earth-creationism/" (), Progressive Secular Humanist, Patheos.
Misattributed

Source: The Long Emergency (2005), Chapter 5, p. 149.

Source: The Geological Evidences of the Antiquity of Man (1863), Ch.20, p. 387-388

Source: Adventures of a White-Collar Man. 1941, p. 137

Source: Dictionary of Burning Words of Brilliant Writers (1895), P. 498.

1963, American University speech
Context: Let us reexamine our attitude toward the cold war, remembering that we are not engaged in a debate, seeking to pile up debating points. We are not here distributing blame or pointing the finger of judgment. We must deal with the world as it is, and not as it might have been had the history of the last 18 years been different. We must, therefore, persevere in the search for peace in the hope that constructive changes within the Communist bloc might bring within reach solutions which now seem beyond us. We must conduct our affairs in such a way that it becomes in the Communists' interest to agree on a genuine peace. Above all, while defending our own vital interests, nuclear powers must avert those confrontations which bring an adversary to a choice of either a humiliating retreat or a nuclear war. To adopt that kind of course in the nuclear age would be evidence only of the bankruptcy of our policy — or of a collective death-wish for the world. To secure these ends, America's weapons are nonprovocative, carefully controlled, designed to deter, and capable of selective use. Our military forces are committed to peace and disciplined in self- restraint. Our diplomats are instructed to avoid unnecessary irritants and purely rhetorical hostility. For we can seek a relaxation of tension without relaxing our guard. And, for our part, we do not need to use threats to prove that we are resolute. We do not need to jam foreign broadcasts out of fear our faith will be eroded. We are unwilling to impose our system on any unwilling people — but we are willing and able to engage in peaceful competition with any people on earth.

De Kooning's lecture Trans/formation, at Studio 35, 1950.
1950's

Source: Three Comrades