Earth From Space: The 'Black' Sea, Turned Blue

By Robinson Meyer
sea615.jpg

NASA

This is the Black Sea, indeed, but it's conspicuously bluer than the also-visible Mediterranean. Every summer, a form of phytoplankton shed calcite and turn the water cyan. This picture is from just a few days ago -- July 15, 2012 -- but the plankton have made their habitat in the sea for millennia.

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This article available online at:

http://www.theatlantic.com/technology/archive/2012/07/earth-from-space-the-black-sea-turned-blue/260049/