What is the science behind déjà vu?

Déjà vu is when you feel like something has already happened, even though it's new to you. It’s like you’re watching a movie and suddenly think you’ve seen this scene before. This happens because your brain mixes up time, maybe the memory of an event comes a little late, so it feels like it already happened.

How It Works Like Magic

Imagine you're eating a sandwich. Your brain sees the sandwich first, then remembers seeing the same sandwich earlier. But since the memory came later, it felt like it had already happened, that’s déjà vu!

Sometimes your brain gets confused and thinks a new experience is familiar, even though it's not.

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Examples

  1. You walk into a classroom for the first time, but you think you've been there before, that’s déjà vu!
  2. Your friend says something new, but it feels like you already heard them say exactly that, this is déjà vu.
  3. When your phone rings and you answer it as if you'd expected the call, that’s déjà vu.

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