Mystery: The mystery of the disappearance of Amelia Earhart is one of the most famous out there, with countless theories regarding what happened to the pilot and her navigator, Fred Noonan. Although many still refer to the disappearance as a mystery, this one was actually solved only four years after the incident. Explanation: What appeared to be Earhart and her plane's remains were discovered on an island within the potential area of the crash site. Among the remains were bones that fitted the measurements of a white female of Earhart's measurements, a piece of a plane's windshield and the same navigational system that was being used on the plane before it went missing. It's technically just circumstantial, but most experts agree that the evidence is pretty much conclusive.