In 1978, a young pilot named Frederick Valentich disappeared somewhere off the coast of Australia. His last recorded message to authorities -- "it's not an aircraft" -- prompted decades of speculation from UFOlogists, skeptics, and law enforcement alike. As we record tonight, his body has yet to be found.They don't want you to read our book.: https://static.macmillan.com/static/fib/stuff-you-should-read/See omnystudio.com/listener for privacy information.