Here's an article dealing with a study saying that current rates of acidification of the oceans are unprecedented in 300 million years. And aragonite is more susceptible to acidification effects than calcite...
http://www.wired.com/wiredscience/2012/03/ocean-acidification-peak/

We might need to kiss most of our tender living mollusks goodbye.

David Kirsh
Durham, NC



Strength is an empty shell. -- Jack London, The Iron Heel

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