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

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.

Below, recent Pictures of the Day:


Presented by

Robinson Meyer is an associate editor at The Atlantic, where he covers technology.

Never Tell People How Old They Look

Age discrimination affects us all. Who cares about youth? James Hamblin turns to his colleague Jeffrey Goldberg for advice.

Join the Discussion

After you comment, click Post. If you’re not already logged in you will be asked to log in or register.

blog comments powered by Disqus

Video

Never Tell People How Old They Look

Age discrimination affects us all. James Hamblin turns to a colleague for advice.

Video

Would You Live in a Treehouse?

A treehouse can be an ideal office space, vacation rental, and way of reconnecting with your youth.

Video

Pittsburgh: 'Better Than You Thought'

How Steel City became a bikeable, walkable paradise

Video

A Four-Dimensional Tour of Boston

In this groundbreaking video, time moves at multiple speeds within a single frame.

Video

Who Made Pop Music So Repetitive? You Did.

If pop music is too homogenous, that's because listeners want it that way.

More in Technology

Just In