Deja vu - have you ever heard this term? Even if you haven't, I'm sure you've experienced it at some point.

This is a phrase originating from French, meaning "already seen". When you do or experience something, you have a feeling of familiarity, as if you've seen it before in the past - that's when you feel deja vu.

In fact, deja vu is still a mysterious phenomenon that is difficult to explain. It is only known that about 60% - 80% of the population has had this experience. And according to scientists, it can have certain meanings for you.