Crack the code for a message from Mars, redux

Waaaay back when Spirit and Opportunity landed on Mars in January 2004, the Planetary Society helped the public participate in the missions with a number of projects, including one where we printed “secret codes” around the edges of the two names-bearing DVDs that were bolted to the Mars Exploration Rover landers. The secret codes weren’t revealed until the rovers themselves took photos of the DVDs and returned them to Earth, and then people ….

URL: http://www.planetary.org/blog/article/00002718/

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