Déjà vu is a French word which means “already seen.” It is the phenomenon of having a strong sensation that an event or experience currently being experienced has already been experienced in the past. Déjà vu is a feeling of familiarity, and déjà vécu (the feeling of having “already lived through” something) is a feeling of recollection.
Scientific approaches reject the explanation of déjà vu as “precognition” or “prophecy”, but rather explain it as an anomaly of memory, which creates a distant impression that an experience is “being recalled.” The explanation is supported by the fact that the sense of “recollection” at the time is strong in most cases, but that the circumstances of the “previous” experience (when, where, and how the earlier experience occurred) are uncertain or believed to be impossible.
However, Dr. Michio Kaku, a Japanese-American futurist, theoretical physicist and popularizer of science, has a different view on the occurrence of déjà vu. Dr. Michio Kaku Explains in the video below one theory behind déjà vu and asks, “Is it ever possible on any scale to perhaps flip between different universes?” He has a mind blowing explanation – check it out!