Olympus Mons: Tallest Volcano in Solar System Holds Surprises
Olympus Mons towers 22 km above the Martian plains — 2.5 times Mount Everest's height above sea level.
Olympus Mons, the largest known volcano in the solar system, rises roughly 22 km above the surrounding plains of Mars — about 2.5 times the height of Mount Everest above sea level. Located on the west...