world amazing video world amaging facts ajab jagabbr Everest is 29,035 feet or 8848 meters highbr The summit is the border of Nepal to the south and China or Tibet on the northbr It is over 60 million years oldbr Everest was formed by the movement of the Indian tectonic plate pushing up and against the Asian platebr Everest grows by about a quarter of an inch (0.25") every yearbr It consist of different types of shale, limestone and marblebr The rocky summit is covered with deep snow all year longbr There are 18 different climbing routes on Everestbr It takes 40 days to climb Mt. Everest in order for the body to adjust to the high altitudebr There is 66 less oxygen in each breath on the summit of Everest than at sea levelbr Thin nylon ropes are used to keep climbers from falling.br Climbers wear spikes on their boots called cramponsbr They also use ice axes to help stop a fallbr Thick, puffy suits filled with goose feathers keep climbers warmbr Most climbers eat a lot of rice and noodles for foodbr Almost all climbers use bottled oxygen because it is so high. It helps keep the climbers warm.br Climbers start using bottled oxygen at 26,000 feet but it only makes a 3,000 foot difference in how they feel so at 27,000 feet, they feel like they are at 24,000 feetbr You have to be 16 or older to climb from the Nepal side and between 18 and 60 on the Chinese side.br The average expedition takes about 39 days.br The Jet Stream sits on top of Everest almost all year longbr The wind can blow over 200 mphbr The temperature can be -80Fbr In mid May each year, the jet stream moves north causing the winds the calm and temperatures to warm enough for people to try to summit. This is called the 'summit window'. There is a similar period each fall in November.br It can also be very hot with temperatures over 100F in the Western Cwm, an area climbers go through to reach the summit.