"...there's no way to tell the age of a living shark - a dead shark's spinal cord has rings that can be counted, much in the same way the rings of a tree can give away its age."
Who knew? I didn't until today!
http://www.upi.com/blog/2013/01/31/Real-life-Jaws-spotted-off-Hamptons/4031359642955/?spt=mps&or=1
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