Inside our observable Universe, there’s just one Earth and one “you.” However in an unlimited multiverse, a lot extra turns into attainable.
Right here in our Universe as we all know it, as soon as an consequence has occurred, there’s no going again. When you open a bag of potato chips, you possibly can by no means return that bag to its unopened state; the air molecules from inside and out of doors have already blended with each other, even in the event you reseal it. As soon as you narrow down a tree, you possibly can by no means return the tree to the state it was in previous to you slicing it down. Even on a quantum degree, when you measure a particle’s spin, you possibly can by no means return it to its pre-measurement state. We have now solely the one Universe that we inhabit, and whereas future occasions don’t but have determinate outcomes, previous occasions all do.
However what if there have been copies of our Universe on the market, far past the boundaries of what’s observable or measurable, that had been an identical to our personal? Would it not be attainable for various outcomes to have occurred in these Universes, and what would that imply for quite a lot of programs: quantum particles, timber and potato chip baggage, and even complete human beings? That’s what Danny Porter needs to know, writing in to ask:
“If the universe is infinite, and string principle suggests…
