"Tonight I am ugly. I have lost all faith in my ability to attract males, and in the female animal that is a rather pathetic malady . . . I don't care about anyone, and the feeling is quite obviously mutual. What is it that makes one attract others?"

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Several times in Earth's history, rapid global warming occurred, apparently spurred by amplifying feedbacks. In each case, more than half of plant and animal species became extinct. New species came into being over tens and hundreds of thousands of years. But these are time scales and generations that we cannot imagine.

— James Hansen