Were all of Edmund expeditions unsuccessful?

No, not all of Edmund's expeditions were unsuccessful.

Sir Edmund Hillary was a New Zealand mountaineer, explorer, and philanthropist. He is best known for being one of the first two climbers to reach the summit of Mount Everest, along with Tenzing Norgay, on May 29, 1953. However, this was not his first expedition. He had previously taken part in a number of other expeditions, some of which were successful and some of which were not.

For example, in 1951, Hillary was part of a British expedition to Mount Everest that reached the South Col, the highest point reached on Everest up to that time. Although the expedition did not reach the summit, it was considered a success as it paved the way for the successful ascent in 1953.

However, not all of Hillary's expeditions were successful. In 1952, he was part of a British expedition to Mount Cho Oyu, the world's sixth highest mountain. The expedition was abandoned due to bad weather and illness.

Overall, it is clear that while some of Edmund Hillary's expeditions were unsuccessful, he also achieved a number of significant successes, including reaching the summit of Mount Everest.