Most topics discussed here are probably narrow enough for our purposes, but there are a few that are simply too broad.
Tamla Horsford
Initial reports were she died after a drunken fall from a balcony, but subsequent investigation found other indications that it might have been a murder that was covered up.
Mary Reeser
Spontaneous Combustion?
Overtoun Bridge
Reports of dog suicides
WHY?
Alcatraz
The famous escape from Alcatraz
Didn't the Mythbusters do this already? ;)
Lizzie Borden
Lizzie Borden took an axe and gave her mother forty whacks. When she saw what she had done, she gave her father forty-one.
Amelia Earhart
Every few years someone finds some bit of circumstantial evidence
JonBenet Ramsey
This little girl was a 6 year old beauty pageant contestant. She'd been bludgeoned and then strangled to death.
Despite almost all the evidence pointing to the family, they were never charged. In 2008 the investigators formally cleared the family based on some DNA evidence.
DNA evidence is not the slam dunk everyone seems to think.
It's just a piece of the investigation puzzle, like any other piece of evidence, like fingerprints, weapons, footprints, etc.
But for some reason, most likely the way TV shows and movies have portrayed it, most Americans think it is the be-all, end-all of investigation.
(Fingerprints and hair analysis were treated like that when they first came out, as well.)
Atlantis
Atlantis was a fictional location made up whole cloth by the philosopher Plato. It was an allegory created just so Plato could talk about his philosophical principles using a fake location - much like Pan-Em in Hunger Games or Wakanda in the Marvel Comics.
This doesn't really count as a mystery, so proceed with caution.
Space Roar
Scientists studying cosmic background radiation detected a huge radio signal that they believe could possibly be evidence of the Big Bang
Somerton Man
Obscure "code" left behind along with Arabic verb for "is finished"
Cicada 3301
Alleged coding/cyberphreak organization that used puzzles to recruit members in the early 2010s
Zodiac Killer
Gardner Museum Heist
Robert Gentile, the last mobster implicated, just died.
Roanoke
Croatoan
JFK
The official story is still questioned by a lot of people.
(Not me though. I've read the full Warren report and believe it to be an accurate representation of what happened.)
