The Solar System's Largest-Known Canyon Is Stunning

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The Valles Marineris canyon on Mars is 10 times as long as the Grand Canyon and three times as deep (Credit: ESA.Int)

Mars is famous for its orangish-red hue caused by the iron oxide in its soil. However, the Red Planet's surface, which has been drastically altered by volcanoes, impact craters, crustal movement, and atmospheric conditions such as dust storms, is also home to a wide range of fascinating topographical features. High among the list is Valles Marineris — the Solar System's longest and deepest-known canyon.

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