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It's an interesting question, but many of the changes that occur with old age could simply be side effects of optimizing for performance before and during reproductive age and need not be evolutionarily advantageous per se.

isn't that just saying the same thing, but in different words? :) better reproduction is the ultimate evolutionary advantage. edit - ok, not "the ultimate", but i guess you know what i mean.. ;)

edit again - i'm a little slow today.. you're right, it might just be an accidental side-effect, sure.

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