Parallel Universes

Do parallel universes exist? How would we know? It is said that deja-vu is our glimpse into a parallel universe. I wonder. The theory intrigues me so. When I start thinking of things like parallel universes, I start thinking about light years.....the Hubble telescope.....E=Mc2........time space continuum. Pictures of the universe from Hubble. Stars dying...black holes...stars forming....galaxies forming....planets forming. The pictures from the Hubble are light that is just reaching us after billions of years. To sit and think that the picture just reached Hubble after travelling millions and millions of LIGHT YEARS........like truly looking back to the past. How amazing is that? If we could get a telescope out in the universe billions of light years away from earth and our galaxy, and we could communicate with it....imagine, we could get a picture of the beginning of our existence. WOW