The scar on the head of President Obama has generated plenty of rumors. Bloggers from the US put forward their own version - he has been zombied by aliens, or the Masons conducted a secret surgery on his brain, reports The Daily Mail. Blogger Ben Hart wrote: "Maybe it was brain surgery? It is possible that this influenced his style of thinking. Is he really an alien from another planet?" While bloggers continue to build a conspiracy theory, Yoki offers its own investigation of mystical events in the lives of American presidents. It is hard to say who was the first one to pay attention to the enigma of the untimely death of American presidents elected in years divisible by 20. This phenomenon is now the subject of numerous studies of specialists in magic and numerology. They are still concerned whether this is a coincidence or regularity: In 1840, William Henry Harrison was elected as US president, and he died before the end of his term in office. In 1860, Abraham Lincoln became president, and was later assassinated. Heads of the White House elected in 1880 (James A. Garfield), 1900 (William McKinley), and 1920 (Warren G. Harding) also died for various reasons before the end of their terms!