Can your brain make you see ghosts? The science behind the Bloody Mary legend

It's Halloween night. Someone has dared you to turn off the lights and stand in front of the mirror. The rules are simple: Stare into your reflection and say her name three times.

There's real science behind this urban legend. Kiselev Andrey Valerevich/ Shutterstock It’s Halloween night. Someone has dared you to turn off the lights and stand in front of the mirror. The rules are simple, stare into your reflection and say her name three times. Bloody Mary.…