In the posts in this blog I have often said that theories about the multiverse (there are many) are not science, but speculations, because it is impossible to design an experiment that demonstrates the existence or non-existence of these multiverses.
In an article
published in May 2023 in the journal Springer Nature, entitled Is Everyone Probably Elsewhere?, the authors
claim that it would at least be possible to distinguish between the following
two hypotheses:
- Our universe is unique, it does not belong to any multiverse.
- Our universe belongs to some multiverse. Of course, we would have no idea what type of multiverse it would belong to.
