The Curious Case Of Déjà Vu

Déjà vu is a rare occurrence, but you know it when you feel it. As you walk through a new city for the first time, something familiar clicks in your mind, giving you pause. You've definitely been here before. But you haven't. So what gives?

Well, no one really knows for sure. The origin of déjà vu (French for 'already seen'), a sense of familiarity with something entirely new, remains hidden somewhere deep in our brains. The phenomenon is difficult to study - most people, when they experience déjà vu, aren't hooked up to a bunch of electrodes, with clipboard-toting researchers at the ready.