The Mandela Effect, or how your mind is playing tricks on you is a popular topic among science people. Simply put, the effect is when a large group of people misremember the same experience.
However, things get interesting from there. Many scientist claim misremembrance is an insufficient explanation and choose to invoke the paranormal.
This documentary analyses several examples of the Mandela Effect, and see if this paranormal invocation is truly necessary.
Some say that the Mandela effect is proof of time travel, others say those are false memories, and some go as far as thinking it is a proof of parallel universe.