Edmund Hillary and Tenzing Norgay are famous all over the world for being the first people to climb Mount Everest in 1953.
Mallory was one of the first people to ever attempt to climb Everest.
It was a very brave thing to do because no one had ever climbed that high before.
Now when people climb Everest there are ropes for safety and people know which is the safest way to go up and down but Mallory did not know any of this.
Mallory was last seen with his climbing partner Sandy Irvine only 250 metres from the top!
The people who found him were able to tell who he was by looking at the labels on his clothes. They said a prayer and made a pile of stones to mark the place where he was. They brought some of his things home to his family.
The BBC made a documentary about Mallory called "The Wildest Dream".
This is the blog of Mr. Brady's first class in Room 13!