BLUF

Research suggests that if you are visiting a new place and it resembles one that you have already visited—the resemblance is enough to trigger a feeling of Déjà vu

Summary

Anne Cleary writing in Science Alert makes the following points:
  • Déjà vu means "already seen" in French.
  • It refers to that weird feeling you have already had the same experience.
  • The most common Déjà vu trigger is a scene, place, or conversation.
  • Some types of brain seizures can also generate feelings of Déjà vu—however, this needs more research.

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