Age written in teeth by nuclear tests.
Spalding, Kirsty L. *; Buchholz, Bruce A. ++; Bergman, Lars-Eric +; Druid, Henrik +; Frisen, Jonas *
[Miscellaneous Article] Nature. 437(7057):333-334, September 15, 2005.

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A legacy from above-ground testing provides a precise indicator of the year in which a person was born.

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