A Swim Through the Ocean's Future

Can a remote, geologically weird island in the South Pacific forecast the fate of coral reefs? 

http://www.smithsonianmag.com/science-nature/A-Swim-Through-the-Oceans-Future.html#ixzz0RPoWEpI0

No, not That island :)

The story is about the Marianas Trench.
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