"We are the ancestors of our grandchildren's children. We look after them, just as our ancestors look after us. We aren't here for ourselves. We are here for each other and for the children of our grandchildren."

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Artificial selection turned the wolf into the shepherd, and the wild grasses into wheat and corn. In fact, almost every plant and animal that we eat today was bred from a wild, less edible ancestor. If artificial selection can work such profound changes in only ten or fifteen thousand years, what can natural selection do operating over billions of years? The answer is all the beauty and diversity of life.

— Neil deGrasse Tyson