Bloody Mary is a name that has haunted sleepovers, bathroom mirrors, and whispered dares for generations. Most of us know the basic story: stand in front of a mirror at midnight, say her name three ...

Despite what you’ve heard at slumber parties, saying “Bloody Mary” to a mirror won’t summon a vengeful spirit. It may, however, trigger a spooky optical illusion. One of the surest ways to prove your ...