There are mysteries that seem like they should have an answer by now. A person vanishes after making a phone call. Three women disappear from the same house without taking their belongings. A hijacker jumps out of an airplane with $200,000 and is never definitively seen again. Years turn into decades, searches get bigger, and theories pile up, but the central question stays exactly where it started. Reddit users recently shared the unsolved cases they still can’t get out of their heads, and some are famous while others are surprisingly obscure. From a bizarre television broadcast to a pilot’s final radio transmission, these are the stories that still don’t quite add up.©RedditBrandon SwansonBrandon Swanson was on the phone with his parents while walking through rural Minnesota in 2008. His father suddenly heard him say, “Oh shit,” followed by silence. Despite extensive searches, the 19-year-old was never found.©RedditThe Springfield ThreeSuzie Streeter, Stacy McCall, and Sherrill Levitt vanished from a Missouri home in 1992. Their cars, purses, and other belongings were left behind, with little indication that any of them had planned to leave.©RedditAndrew GosdenIn 2007, 14-year-old Andrew Gosden skipped school and took a train to London alone. CCTV captured him leaving King’s Cross station, but what he planned to do there and where he went next remain unknown.©RedditWho Put Bella in the Wych Elm?An unidentified woman’s remains were discovered inside a tree in Worcestershire in the 1940s. Soon afterward, strange graffiti began asking, “Who put Bella in the Wych Elm?” Her identity was never conclusively established.©RedditFrederick ValentichAustralian pilot Frederick Valentich was flying over Bass Strait in 1978 when he radioed that an unusual object appeared to be following him. His transmission ended shortly afterward, and neither Valentich nor his aircraft was ever recovered.©RedditThe Lead Masks CaseTwo Brazilian electronics technicians were found dead in 1966 wearing suits, raincoats, and homemade lead masks over their eyes. A cryptic note with timed instructions was nearby, but investigators never established exactly what the men were doing there.©RedditD.B. CooperA man calling himself Dan Cooper hijacked a plane in 1971, demanded $200,000 and parachutes, then jumped somewhere over the Pacific Northwest. Some of the ransom money eventually surfaced. Cooper never did.©RedditThe Zodiac KillerThere have been suspects, supposed breakthroughs, decoded messages, and decades of theories. Still, nobody has ever conclusively established the identity of the Zodiac Killer, who terrorized Northern California and sent taunting letters to newspapers.©RedditJoanna LopezDuring an overnight broadcast in Chicago, a missing-person notice appeared for a woman named Joanna Lopez. Her photograph was so dark that her face was barely visible, and remarkably little verified information about Lopez ever surfaced afterward.©RedditThe Hinterkaifeck MurdersSix people were killed at Germany’s isolated Hinterkaifeck farm in 1922. Reports of unexplained activity around the property before the murders made an already disturbing case even stranger, and nobody was ever convicted.©RedditThe Somosierra BoyTen-year-old Juan Pedro Martínez Gómez was traveling with his parents through Spain in 1986 when their truck crashed. His parents died in the accident, but Juan Pedro was nowhere to be found and has never been located.©RedditThe Fallon Leukemia ClusterBetween 1997 and 2002, Churchill County, Nevada, recorded an unusually high number of childhood leukemia cases. State and federal investigators examined possible environmental causes, but no definitive explanation for the cluster was found.©RedditMichael DunaheeFour-year-old Michael Dunahee disappeared from a playground in Victoria, British Columbia, in 1991 while his family was nearby. A large search began almost immediately, yet investigators found no confirmed trace of where he went.©RedditSneha PhilipSneha Philip was last seen in New York on September 10, 2001, the day before the World Trade Center attacks. She was eventually declared a 9/11 victim, but exactly where she went during her final hours remains uncertain.©RedditSomething Ate a Tagged Great White SharkA tracking tag from a great white shark recorded a sudden deep descent followed by a sharp rise in temperature, suggesting the tag had entered another animal. Predation is a plausible explanation, but nobody witnessed exactly what happened underwater.The post 15 of Our Creepiest Mysteries That Remain Unsolved appeared first on Den of Geek.