For most modern people, the story of Marie Antoinette ends with her death. For some, though, it didn't end until 1998, when one of the most credible pretenders to the throne of France was, posthumously, discredited. See how genetics solved a 200-year-old mystery.
These columns are found in Varna, Bulgaria. They're hollowed out and filled with sand, almost perfectly round, and grouped together. And they're 100 percent natural formations. Sometimes even prehistory is in on the conspiracy to make us believe that we've discovered evidence of alien visitors.
In the grasslands of Namibia are millions of strangely bare circles. They're called "fairy circles." Although we know, roughly, what happens during their lifespan, no one knows why they crop up, or why they eventually fade.