Taller Than Earth’s Highest Peak

Olympus Mons, with caldera, aureole and escarpment.
Olympus Mons, with caldera, aureole and escarpment.

Two and a half times as tall as Mount Everest, Mars’ Olympus Mons is a vast volcanic mountain, about the size of Italy, with slopes so gentle that it resembles a warrior’s shield. Its outer edge consists of an escarpment (that is, a steep slope or a cliff) that’s five miles high.

h/t: E.S.A.

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