Why do I get déjà vu?That strange feeling is a sign of a healthy mind.

From the show

Science Around You

Uncover the real reason behind that unsettling feeling of having been somewhere or done something before. Déjà vu isn't a glitch in the matrix or a past life peeking through; it's your brain's memory system running a routine fact-check. This internal conflict between a feeling of familiarity and the reality of a new experience is actually a positive signal. It means your brain's error-detection is working exactly as it should.