The dimensions stem from a common genesis point, and then diverge endlessly following the second law of thermodynamics. At most, some may come close to each other as to be felt so subtly you'd call it a coincidence, or a "dΓ©jΓ vu". In reality, life stands right in between all of them, choosing to be present in different instances at a time. In any given instance, the perception is such that that is the only path available and persistent, but that perception does not appreciate the inherent impermanence of life. I have lived a thousand lives and will live a thousand more.