Deja Vu !!
You walk into a room, and you suddenly feel like you’ve been there before — even though you know you haven’t. The feeling is overwhelming, then it disappears just as quickly as it came on. The eerie feeling that you’ve been here and done this before is called déjà vu. It’s French for “already seen,” and it can be a very strange and even unsettling experience. Logically, you know you haven’t experienced this moment before, but your brain is telling you otherwise. Déjà vu is a common experience — about two-thirds of people have had it. But it’s still widely misunderstood. The reason simply is it’s hard to study in a laboratory, so our understanding is limited. There are a few theories, though, about what might lead to this “glitch” in the brain. A healthy brain can experience déjà vu. This doesn’t necessarily mean you should raise the alarms. The sensation is more likely to happen to people who travel often and have college or advanced degrees. And it can peak in young adulthood, b...