https://www.scientificamerican.com/article/scientific-american-vs-the-supernatural/ > In 1922 Scientific American announced a high-stakes international contest to find scientific proof of ghosts. The competition offered $5,000,and it pitted top scientists of the day against wildly popular psychic mediums. The contest also escalated a growing feud between two famous friends: renowned magician and escape artist Harry Houdini and Sherlock Holmes creator Arthur Conan Doyle.