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Ius Chasma

Ius Chasma shows signs of water and wind, which shaped these rivulets.
Ius Chasma shows signs of water and wind, which shaped these rivulets. Image: NASA/JPL-Caltech/Univ. of Arizona

Ius Chasma sits in Mars’ largest canyon, Valles Marineris. Researchers believe that water seeped out of the formation’s cliffs and evaporated before it could reach the canyon floor. The result is this artful geological formation.