Located on the border of China and Nepal, Mount Everest is 29,029 feet tall and is the tallest mountain in the world. This official height was recorded in 1955 by an Indian survey.
There’s been a dispute about the true height of the mountain since 1856, when the first measurement was taken. The Nepalese think the snow on top of the mountain should be included in the measurement, whereas the Chinese believe only the height of the rock itself should be measured. In May 1999, an American team using GPS technology measured the mountain at 29,035 feet and believes the height may be rising because of Earth’s shifting continental plates. The National Geographic Society uses this measurement, though it is not accepted by Nepal.