Old ideas about aging gain new respect
2nd May 2006, 21:04 GMT
Since Darwin and August Weismann wrote about aging in the 19th century, it has always seemed apparent that animals are programmed to deteriorate with age, and ultimately to die. But to an evolutionary theorist, this idea is absurd. Natural selection chooses survival and reproduction - not death and destruction! In recent years, genetic evidence has added to the impression that there is an evolutionary program for death. Now there is a theory about how natural selection might manage this feat. read more
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