National Geographic Society

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Some of the Things That Molecules Do

Scientists have only been able to detect the planets of other stars for a few decades. Experts have deduced that planets outnumber the stars, nearly all of them different from Earth.

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Life is transformation. Artificial selection turned the wolf into the shepherd and all the other canine breeds we love today. And over the eons, natural selection has sculpted the human eye out of a microscopic patch of pigment.