Have you ever had Deja Vu? Have you ever had Deja Vu? Now, have you ever wondered what's happening in your brain that causes you to experience the phenomenon?

There are  a lot of theories as to why we experience that feeling of having "been here before." You know the one - you've been on this street before. Maybe you've been reading this before doing exactly what you're doing at this instant... This video gives a few explanations of what may or may not be going on inside your brain to cause Deja Vu.