If you've ever had the eerie sensation that you've already lived out an EXACT moment before in your life but here it is again, you've had firsthand experience with deja vu. But have you ever taken the time to really look into what that is? 

In this first episode of a three-part series, Mrs. Casper and Miss Duncan dig into some awesome theories about what is causing deja vu -- and they basically all involve dead people. If you're not intrigued by that, you might be an alien - which is also mentioned in the show. 

Photo by DODJI DJIBOM on Unsplash