Polygons on Mars

Polygons on Mars
Polygons on Mars Although some scientists believe Mars’ giant polygons may be further evidence of ancient oceans on the Red Planet, their exact origin remains a mystery. These giant polygons—in the southern Utopia area of Mars’ northern lowlands—are surrounded by relatively straight troughs. This image, taken by the Context Camera (CTX) on Mars Reconnaissance Orbiter, is about 29 kilometers (18 miles) across, and most of the polygons shown are between 8 and 15 kilometers (5 and 9 miles) across. NASA/JPL/MSSS

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