There are infinite worlds both like and unlike this world of ours.
--- Epicurus, Letter to Herodotus
Some present-day physicists explain that the universe is not one & there exist an infinite numbers of other universes outside our space & time. In their theory of parallel universes, in one world, Elvis Presley is still alive & sing his songs now, & in another world, Marilyn Monroe has become a happy grandmother still alive, now. According to Alan Guth, “Anything can happen wiill happen” in the multiverse. To have created this theory, they may have been inspired by Epicurus (340-270 BC), ancient Greek philosopher, who sent a letter to the historian Herodotus, on which his cosmology was stated. Moreover, apart from whether he knew or not, Buddhists in the ancient India thought that there existed three thousand or numberless worlds infinitely expanding. Here, we check the writing which Herodotus read:
There are infinite worlds both like and unlike this world of ours.