January 11, 20212 min read, 437 words
Published: January 11, 2021 | 2 min read, 437 words
Ten times longer than the Grand Canyon, and three times as deep, the Valles Marineris (The Mariner Valley) cuts through the surface of Mars. This grandest canyon in the Solar System stretches 4,000 km (2,500 miles) across the Red Planet — nearly covering a quarter of the circumfe...
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