Bubbles of space-time cropped up during the early stages of our cosmos, ultimately forming black holes that were connected to us by wormholes according to a new theory. Research displays that these bubbles ultimately lost energy, and collapsed into a black hole that was so big, it produced its own universe inside – linked to us by the secret door.
These wormholes would have been very short-lived – no more than fractions of a second. During that time, our universe would have been linked to a vast multiverse – loads of other universes. Andrei Linde told New Scientist: “This subject is actually, really deep. We are just starting to touch the surface and find new things about the multiverse.”