The Matryoshka Multiverse

Black holes, universe

The web of worlds: Stars form galaxies, these groups and clusters, these superclusters, this universe of ours – why should the hierarchy end here? Perhaps the entire observable universe is just a tiny speck in a larger space and this one universe in an even larger one… and so on. Nobody knows how gigantic the cosmos is.
© Science Photo Library/Sakkmesterke

Does the cosmos consist of countless universes – nested in black holes like Russian dolls?


That our universe could be embedded in something larger is an old idea. The French mathematician and philosopher Blaise Pascal, for example, thought before 1662 that

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