“Mount Everest is the tallest mountain on Earth”

The widespread belief that Mount Everest is the tallest mountain on Earth stems from the common understanding and traditional method of measuring mountain height: elevation above sea level. Since the mid-19th century, when the British-led Great Trigonometrical Survey of India meticulously measured the Himalayan peaks, Mount Everest has been recognized as having the highest elevation, currently established at 29,032 feet (8,848 meters) above sea level. This measurement, achieved through complex triangulation using instruments like theodolites, became the standard for defining a mountain's height, solidifying Everest's reputation as the "Roof of the World."

However, the definition of "tallest" becomes more nuanced when considering a mountain's total height from its base to its summit. By this metric, Mauna Kea in Hawaii surpasses Everest. This massive shield volcano rises an astounding 33,500 feet (10,210 meters) when measured from its true base on the Pacific Ocean floor to its peak. While only 13,803 feet (4,207 meters) of Mauna Kea are visible above the ocean, its vast submerged portion makes it technically taller than Everest.

The reason people commonly believe the myth of Everest being the absolute tallest lies in the historical and practical challenges of measurement. Early surveyors, operating from land, naturally used sea level as a consistent and accessible baseline for their calculations. Measuring the hidden depths of underwater mountains was not feasible with the technology available at the time of Everest's initial surveys. Therefore, while Everest undeniably holds the title of the highest peak above sea level, the distinction of the tallest mountain from base to summit belongs to Mauna Kea, highlighting how definitions can change our understanding of the world's natural wonders.