Psychology
Can déjà vu hint at hidden structures in memory?
Quick fact
Déjà vu occurs when your brain produces a feeling of familiarity about a new situation, often triggered by a mismatch between your unconscious memory and conscious awareness.
Why this is interesting
About 70% of people have experienced déjà vu—the unsettling feeling that you've been in this exact situation before—but scientists still debate whether it's a healthy brain check or a minor memory misfire.