As you may know, the term “deja vu” is French for “seen already”. Most of us have experienced it – reliving a moment in some way, familiarity with a landscape or conversation, for example.
But what exactly is “deja vu”? What is the brain doing? Scientifically, what is happening?
Science can inform us about the phenomenon, but at the moment, there's much we do not know. No one seems to be absolutely certain – specifically - what it is, how it happens, or why?
We do know that it seems to happen most to those in the age bracket of 15-25 - though, of course, it occurs outside of those parameters as well. Gender seems not to matter. And those who remember dreams may be more likely to experience it.
Researchers have used creative ways to study deja vu - examining the brains of epileptics, for example, and inventing 3D video games to simulate the experience.
For a more complete look at deja vu, see the article at CNN.
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