The world’s highest mountain was not “discovered” by a climber. It was found on paper, by a Bengali mathematician working through survey tables.
The Great Trigonometrical Survey
From 1802 the British-run Great Trigonometrical Survey of India measured the subcontinent with chains of triangles across thousands of kilometres. Knowing one side of a triangle and its angles precisely, surveyors could calculate distances — and heights — of places they could never visit.
Radhanath Sikdar
Radhanath Sikdar, born in Calcutta in 1813, joined the Survey in 1831 as a “computer” — a person who did the calculations. He became known for his mathematical skill and later headed computations at the Survey’s office.
Peak XV
Surveyors had observed a Himalayan summit from stations in the plains, more than 150 km away, and labelled it simply “Peak XV”. Turning those observations into a height meant correcting for the curvature of the Earth and for the way the atmosphere bends light. Working on the data around 1852, Sikdar concluded that Peak XV was higher than any mountain then known.
After checks, the Survey announced the height in 1856 as 29,002 feet. The peak was named after George Everest, a former Surveyor General, although Everest himself had objected to the use of his name. Modern measurements put it at about 8,849 metres (29,032 feet) — remarkably close to the 19th-century figure.
Why it is wacky
The most famous mountain on Earth was identified by someone sitting at a desk, using trigonometry, more than a century before anyone stood on top of it (1953).
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