10 Facts About the Ancient Aliens Guy Ancient Aliens Mysteries Share Most Recent Who is Craig Tester? The engineer solving Oak Island’s puzzle 5 famous British Commandos from WWII The Erfurt Latrine Disaster: History’s grossest tragedy? Marcel Petiot: A Serial Killer in Nazi Paris More from HISTORY Why does Sudan have so many pyramids? Goulston Street graffito: Jack The Ripper's missing clue? Is Jack The Ripper’s ‘Dear Boss’ letter genuine? Has Jack The Ripper’s identity been revealed?