Everest received positive critical reviews.
=== 20th-century surveys ===In 1856, Andrew Waugh announced Everest (then known as Peak XV) as 8,840 m (29,002 ft) high, after several years of calculations based on observations made by the Great Trigonometrical Survey
 2015 was the first time since 1974 to 2023 with no spring summits, as all climbing teams pulled out after the quakes and avalanche

