The Himalayas are known as 'the roof of the world' because they are home to Mount Everest, the highest mountain in the world. For a long time, people didn't know which was the tallest mountain, until a group from India did maths to figure it out in 1852. They found out that Mount Everest was the highest, but it took them until 1952 to figure out exactly how tall it was.
In 1953, two men from different countries, Edmund...