What's the tallest thing in the whole world?
The tallest thing in the whole world is Mount Everest, which reaches just over twenty-nine thousand feet above sea level.
From base to summit, Mauna Loa volcano rises 30,085 ft, much taller than Mt Everest at only a 12,000 feet rise and Denali at an 18,000 ft rise. Above sea level, Everest is the tallest at 29,029 ft.
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