What is Déjà Vu?!
This video from It’s okay to be smart talks about the Déjà Vu effect.
You know the effect when you have the impression of having already experienced a moment?
Well this is it.
“Déjà vu” is the french translation for “already seen”.
Check the video
And then check the sources and references in the description of the video… and also maybe the Wikipedia article.