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California or Mars? Test how well you can spot your own planet from the red planet
Selfie by the Curiosity rover over in Gale crater on Mars. Credit: NASA/JPL-Caltech/MSSS. California or Mars? Credit: NASA/JPL-Caltech/MSSS California or Mars? Credit: NASA/JPL-Caltech/MSSS California or Mars? Credit: Bob Wick, BLM via Creative Commons California or Mars? Credit: Jean-Christophe BENOIST via Wikimedia CC. California or Mars? Credit: NASA/JPL-Caltech/MSSS

California or Mars? Credit: NASA/JPL-Caltech/MSSS
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California or Mars? Credit: NASA/JPL-Caltech/MSSS