Do we live in an expanding bubble?


An intriguing theory that has just 'bubbled' to the surface in cosmology is the notion that our expanding universe, as observed by astronomical instruments, may be a bubble within some kind of 'dark matter liquid'.
That opens the door to the possibility that there are other universes, co-exiting with ours, in the surrounding dark matter soup and that these bubbles could meet, and conceivably merge, like bubbles like to do.
This theory supports the observation that our universe appears to be expanding. The suggested explanation is that gravitational pull from some unseen kind of 'dark matter' is the cause.
Some good food for our imagination.

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