This image by Mark Garlick compares the height of Earth's Mount Everest with Olympus Mons, a shield volcano on Mars and the tallest mountain in the known Solar System https://t.co/8cbpmE6lJC pic.twitter.com/I4aCW7dGZl
— Massimo (@Rainmaker1973) June 17, 2020
Thursday, July 16, 2020
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