Mount Everest is the Wonders of the world.

Mount Everest – also called Qomolangma Peak (Mount Sagarmāthā (Nepali: सगरमाथा), Tibetan: ཇོ་མོ་གླང་མ; Chinese Zhumulangma Peak simplified Chinese: 珠穆朗玛峰; pinyin: Zhūmùlǎngmǎ Fēng), Chajamlangma (Limbu), or Mount Chomolangma – is the world's highest mountain above sea level at 8,848 metres (29,029 ft). Part of the Himalaya range in Asia, it is located on the border between Sagarmatha Zone, Nepal, and Tibet, China.The highest mountain on the planet, Mount Everest is growing two inches taller each year. Satellite technology says the mountain is currently 29,107 feet tall. First recognized as the highest peek in 1852, it got its western name ten years later in 1862. Mount Everest was named for Sir George Everest (1790-1866), a British surveyor. Surveyors don't agree on the height of Mount Everest. The British government in the 1800's thought the height was 29,002 feet. In 1954 the Indian government said it's 29,028 feet, but a widely used unofficial figure says it is 29,141 feet! As the altitude increases, the oxygen content of the air decreases dramatically. At 9,800 feet, for example, there's about 2/3 of the oxygen in the air than at sea level. At 20,000 ft, there is roughly half the oxygen content in the air. At 29,035ft, the summit of Everest, there is only a third of the oxygen in the air.After world war II, many people had tried to attack Mt. Everest again. At last in 1953, Edmund Hillary, and Tenjin Norgay, he is a Nepali Sherpa had reached the summit . When they reached the summit, they did not find anything which Mallory left at the summit, so they realized they were the first persons who reached the summit of Mt. Everest.

There are 14 mountains in the world which are over 8000 meters high. People call these years Himalayan Olympic, because many countries tried to become the first country reaching the top of each 8000m mountain for their honor of countries. After Himalayan Olympic, many different kinds of records were made on Mt. Everest. One of them was reaching the summit without oxygen bottle. This record was made by Reinhold Messner. He is one of the greatest climber in the world. He is called "Super man". He was the first person who climbed all 8000 meters mountains.

Reaching the summit without oxygen bottle is very difficult. Because, At the top of Mt. Everest the density of oxygen in air is also one third of ground level. Some people has mountain sickness at Mt. Fuji which is only 3800m high. They had head ache sickly feeling, throw up many times and sometimes their brain have lack of oxygen and they die.