Olympus Mons is a giant volcano on Mars. It is the tallest mountain in space. It is almost three times higher than Mount Everest. It shows us how amazing the rocks and land on Mars can be.
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'I went out of this world' – 86-year-old cycles height of tallest mountain in solar system
When 86-year-old Gerard McCarten finished his latest challenge – cycling the equivalent height of the tallest mountain in the solar system – he went to lift his bike above his head. His legs trembled ...
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