Mt. Everest is 29,029 feet (8,848m) tall and is a perilous journey for many who have or haven't climbed it. Now they have failed because they either die or they just stop and come back down.
During the British Mount Everest expeditions of the 1920's, the British teams were the only climbers on the mountain at the time, they saw no other climbers.
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The climbers on Mount Everest during the 1920's expeditions only saw there team mates as there were no other people on the mountain at the same time
Today, there would be lots of climbers, sometimes many hundreds heading for the summit of Mount Everest at the same time.
Climbing guides can earn their living on Mount Everest by guiding other climbers to the summit.
The only other climbers Ed Hillary saw where those of his team and there was no other expedition on the mountain at the same time.
They will see prayer flags, other climbers sat down or taking photos and there is no higher they can climb.
20 people came to climb mount Everest
Just under 1000 people attempt to climb Everest each year and about 500 climbers reach the summit every year, this being a combination of Sherpas, other guides, clients, and professional climbers.
On the summit of Mount Everest you will find, apart from other climbers, lots of prayer flags, flags from different countries and gifts. These are all left by the climbers, the flags are to show what country they are from and the gifts are to thank the gods of the mountains for allowing the climber to reach the highest summit in the world.
The only people Mallory and Irvine saw while climbing on Mount Everest were there team mates, there was no one else on the mountain
In the Spring of 1975 when Junko Tabei was on Mount Everest there were only her team from Japan and one other team from China. She would had seen members from both teams while on the mountain.