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Last updated on April 19, 2014 at 17:21 EDT
Olympus Mons 25 kilometres high is the highest volcano in
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Olympus Mons, 25 kilometres high, is the highest volcano in the Solar System

January 17, 2005
The highest volcano in the Solar System, Olympus Mons, rises 25 kilometres above the surrounding plain: Mount Everest is only one third as high.