The Mountain of Mars Olympus Mons towers 13.6 miles above Mars. That's three times taller than Mount Everest. The base spans 374 miles across. You could fit the entire state of Arizona inside it. The volcano formed over billions of years. Lower gravity allowed it to grow impossibly tall. Mars hosts the solar system's most massive mountain.
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SpaceMar 22, 2026
The Mountain of Mars
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