168 years?
I DEMAND to know how they can claim such an accurate figure.
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Kung_Fu_Russ ran out of amusing signatures on, Thu 9 Jun 2011, 8:57,
Reply)
Growth ring analysis apparently
like counting the rings on trees, they count layers of the shell (I presume it's the shell)
manandmollusc.net/geoduck.html ctrl f and search for 'ring'. You know you want to...
(
Hellzapoppin, Thu 9 Jun 2011, 9:18,
Reply)