• MajorasTerribleFate@lemmy.zip
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      20 hours ago

      Wikipedia, re: Valles Marineris on Mars:

      At more than 4,000 km (2,500 mi) long, 200 km (120 mi) wide and up to 7 km (23,000 ft) deep, Valles Marineris is the largest canyon in the Solar System.