The choice, however, is as clear now for nations as it was once for the individual: peace or extinction.

Nature doesn't need people - people need nature; nature would survive the extinction of the human being and go on just fine, but human culture, human beings, cannot survive without nature.

One of the most painful things in the Western States and Territories is the extinction of childhood. I have never seen any children - only debased imitations of men and women, cankered by greed and selfishness, and asserting and gaining complete independence of their parents at ten years old.

The future of humanity is going to bifurcate in two directions: Either it's going to become multiplanetary, or it's going to remain confined to one planet and eventually there's going to be an extinction event.

Freedom is never more than one generation away from extinction. We didn't pass it to our children in the bloodstream. It must be fought for, protected, and handed on for them to do the same.

The death of democracy is not likely to be an assassination from ambush. It will be a slow extinction from apathy, indifference, and undernourishment.

The cost of our success is the exhaustion of natural resources, leading to energy crises, climate change, pollution, and the destruction of our habitat. If you exhaust natural resources, there will be nothing left for your children. If we continue in the same direction, humankind is headed for some frightful ordeals, if not extinction.

It's easy to think that as a result of the extinction of the dodo, we are now sadder and wiser, but there's a lot of evidence to suggest that we are merely sadder and better informed.

What doesn't KILL me makes me stronger? Except for the extinction of COFFEE? that might kill me.

"In every remote corner of the world there are people like Carl Jones and Don Merton who have devoted their lives to saving threatened species. Very often, their determination is all that stands between an endangered species and extinction.

He caught a glimpse of that extraordinary faculty in man, that strange, altruistic, rare, and obstinate decency which will make writers or scientists maintain their truths at the risk of death. Eppur si muove, Galileo was to say; it moves all the same. They were to be in a position to burn him if he would go on with it, with his preposterous nonsense about the earth moving round the sun, but he was to continue with the sublime assertion because there was something which he valued more than himself. The Truth. To recognize and to acknowledge What Is. That was the thing which man could do, which his English could do, his beloved, his sleeping, his now defenceless English. They might be stupid, ferocious, unpolitical, almost hopeless. But here and there, oh so seldome, oh so rare, oh so glorious, there were those all the same who would face the rack, the executioner, and even utter extinction, in the cause of something greater than themselves. Truth, that strange thing, the jest of Pilate's. Many stupid young men had thought they were dying for it, and many would continue to die for it, perhaps for a thousand years. They did not have to be right about their truth, as Galileo was to be. It was enough that they, the few and martyred, should establish a greatness, a thing above the sum of all they ignorantly had.

Extinction catches Man by surprise because no one can even imagine that such a catastrophe can happen to an intelligent species.

People whose history and future were threatened each day by extinction considered that it was only by divine intervention that they were able to live at all. I find it interesting that the meanest life, the poorest existence, is attributed to God's will, but as human beings become more affluent, as their living standard and style begin to ascend the material scale, God descends the scale of responsibility at a commensurate speed.

Freedom is never more than one generation away from extinction. We didn't pass it to our children in the bloodstream. It must be fought for, protected, and handed on for them to do the same, or one day we will spend our sunset years telling our children and our children's children what it was once like in the United States where men were free.

The struggle for existence holds as much in the intellectual as in the physical world. A theory is a species of thinking and its right to exist is coextensive with its power of resisting extinction by its rivals.

The choice however is as clear now for nations as it was once for the individual: peace or extinction.

Doctors dressed up in one professional costume or another have been in busy practice since the earliest records of every culture on earth. It is hard to think of a more dependable or enduring occupation harder still to imagine any future events leading to its extinction.

Freedom is never more than one generation away from extinction. We didn't pass it to our children in the bloodstream. It must be fought for protected and handed on for them to do the same.

At issue was the question whether this man's faith could prevail against a man whose equal faith it was that this society is sick beyond saving and that mercy itself pleads for its swift extinction and replacement by another.

It's a matter of life and death for this country. The Kenyan forests are facing extinction and it is a man-made problem.

The death of democracy is not likely to be an assassination from ambush. It will be a slow extinction from apathy indifference and undernourishment.

The damage that climate change is causing and that will get worse if we fail to act goes beyond the hundreds of thousands of lives homes and businesses lost ecosystems destroyed species driven to extinction infrastructure smashed and people inconvenienced.

That last day does not bring extinction to us but change of place.