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7 January 2013

© Franklin J. Viola 2013  All Rights Reserved.

Annual Rings

Similar to dating trees,
the cross-section of a Tridacna Clam's shell
displays 'growth rings' that allow scientist to determine
the bivalve's age. In this case, 45 years.
As is the giant living mollusk in the tank
here at Fitzroy Island National Park,
Queensland, Australia.



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