Cosmology’s dirty little secret, the thing the scientists don’t like to tell you because, well, it’s embarrassing. But, according to the standard picture of our Universe combined with the standard picture of physics, quantum theory, there may be an infinite number of other domains like our Universe in which all possible histories are played out. It could be that there is something wrong with the standard picture of cosmology or physics or both. Or it could be that there really are an infinite number of copies of you out there in the Universe! If that doesn’t blow your mind, nothing will! (I got this somewhere, but I don't remember where! How fitting.)
Life of a Norfolk farmer