In celebration of Earth Day, we're releasing a new puzzler image every day this week. Here's the first. What part of the world does it show? What features do you see? Which satellite and instrument acquired it? And what makes the image interesting to you? Good luck!

Read more about the puzzler at
http://earthobservatory.nasa.gov/blogs/earthmatters/2013/04/22/earth-week-puzzler-1/?src=googleplus
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