517K views · 14K reactions | The most chilling mysteries are still unsolved. Six new Unsolved Mysteries are launching October 19. | Netflix | Facebook

19K views · 313 reactions | The summer of ’69 changed the way society viewed the world. In a small Massachusetts town residents were forced to question, “Are we truly alone in the universe?” Watch "Berkshires UFO" on Netflix. #unsolvedmysteries #aliens | The Official Unsolved Mysteries | Facebook

122K views · 4.3K reactions | One of the most famous unsolved problems in Mathematics Collatz Conjecture. Don't miss the end. #gurubaa | Gurubaa | Facebook

They are two of the longest unsolved crimes in American history, inspiring countless theories, books and films. The Zodiac Killer was linked to five murders in the late 1960s; the 1947 Black Dahlia case centered around the killing of Elizabeth Short, a young Hollywood hopeful. Now, a retired LAPD homicide detective has made a startling claim about these cold cases: he says the crimes were committed by the same killer. #Zodiac #Hollywood #TrueCrime #BlackDahlia | Inside Edition

63K views · 1.8K reactions | 'This is one of those unsolved crimes that's captivated America for the past 27 years' A man has been charged in Las Vegas over the murder of rapper Tupac Shakur, who was shot dead in 1996. Sky's Martha Kelner has more on this story. https://trib.al/tjoaw4r Sky 501 / YouTube | Sky News | Facebook