X-Rays Removed Body Hair
In the early 20th century, people believed that they had figured out the end-all-be-all way to get rid of body hair without having to shave. Before anybody cared about the radium found in X-rays or the harmful effects it has on people, women used X-rays to remove their body hair. While it was extremely effective, many people who followed through with this hair removal process ended up with cancer.