As I’ve mentioned in earlier posts, I’m examine ways in which an ‘Infinite Probability Drive’ (as opposed to Douglas Adams’ Infinite Improbability Drive) might function — at least from the viewpoint of the driver of the vehicle it’s propelling — for series two of The Modest Proposal Institute. It opens up plenty of possibilities, such as the ghosts and UFO’s that people see but can never quite tie down. Our heroes may appear as ‘ghosts’ in the parallel universes they visit, just as the universes they visit may appear ghostly to them.
That would be likely in the universes they visit that are very close to ours in probability; i.e. almost 100% the same but not quite. But what about the case where our hero sets the probability to a small number, such as one percent? If there are an infinite number of parallel universes and they are separated only by probability levels, then there must be some where this Earth never got life, or life began then died out — as some have suggested might have happened on Mars. Perhaps it did get life but not carbon-based? Many of these ideas have been explored by writers, such as what if the dinosaurs hadn’t been wiped out but continued evolving until they were the dominant species intellectually as well as physically — Dino Sapiens, in fact. Our ghostly heroes might see such a world as thin shadows but no one on that world may ‘see’ them at all. One thing I can be sure of, no matter what parallel universe they enter, the probability of finding any thinking being happy is almost zero. You have to be a non-sentient being for that to happen:-)