Why do we get déjà vu, and what causes it?

We get déjà vu when our brain thinks it has seen something before, even though it hasn’t, like seeing a toy you’ve never seen before, but it feels super familiar.

Imagine you're playing with your favorite blocks. You stack them up in a certain way and say, “This looks just like the tower I built yesterday!” But you didn’t build that tower yesterday, it just felt that way. That’s déjà vu.

How our brain makes mistakes

Our brain is like a detective trying to figure out what's going on around us. Sometimes, it gets confused between what we see and what we remember. It might think you've seen something before because your brain mixed up two moments, like when you're walking into a room and suddenly feel like you’ve been there already.

Why it feels so real

It's like hearing a song that sounds familiar, but you don’t know why. Your brain thinks it’s remembering, but really, it's just making a guess. That’s why déjà vu feels so strong, your brain is sure of it, even if it’s not right!

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Examples

  1. A child feels like they've already been to the park even though it's their first time there.
  2. You're eating breakfast and suddenly feel like you've done this before, even though you haven't.
  3. Walking into a store and thinking you’ve been here for years.

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