Who was Jack the Ripper? Where did the Nazis stash their gold? Who are the real Men in Black? Did aliens send the 'WOW' signal? How will the world end? 100 Things They Don't Want You to Know sets out to uncover the truth behind the world's most mysterious cover-ups and unexplained events that have been shrouded in secrecy for generations. From suspicious deaths and disappearances to enigmatic identities, from Cold War cover-ups to puzzling paranormal phenomena and from ancient artefacts to coded documents.100 Things They Don't Want You to Know takes you on a quest to solve the greatest mysteries, strange disappearances, suspicious cover-ups and conspiracy theories.