For geochemist Beverly Johnson, shells tell a story

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Friday December 21, 2007 1:37 pm	For geochemist Beverly Johnson, shells tell a story Organic geochemist Beverly Johnson knows that an eggshell can endure even for tens of millennia. Moreover, that shell can reveal much about the world in which it was made.

Friday

December 21, 2007
1:37 pm

Organic geochemist Beverly Johnson knows that an eggshell can endure even for tens of millennia. Moreover, that shell can reveal much about the world in which it was made.