Most people have experienced déjà vu at some point in their lives—that eerie phenomenon where an experience feels way more familiar than it should. As much as 70 percent of people have experience with the feeling, but the people who feel it most are those between 15 and 25 years old. The reason why is mysterious, but it could shed light on why déjà vu happens in the first place.
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What Causes Déjà Vu?
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Key Facts In This Video
About two-thirds of the population have experienced déjà vu at least once. 00:25
Déjà vu might be caused by a neuron spontaneously firing or a delay in a neuron's transmission. 01:11
Some theorists hypothesize that déjà vu arises when the brain recognizes a few familiar elements in a new setting. 01:51