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Our body of course exchanges some atoms with environment every day however are there some of atoms which stay with us a life time?

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up vote 9 down vote accepted

The atoms in the enamel of the teeth are not exchanged with the environment. Indeed, long after your death their isotopic composition can be used to tell where you lived while your teeth were growing.

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That's pretty amazing. – user12345 Apr 22 '13 at 14:04

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