An illustration showing the bouncing universe model. Two cone-shaped grids full of stars and galaxies are arranged closed end to closed end.

‘Bouncing’ universe theory still can’t explain what came first

New research highlights a troubling problem with concepts of a cyclical universe that experiences infinitely alternating periods of rapid expansion and contraction, known as ‘bouncing universe’ models.

These bouncing universe models suggest the cosmos has no beginning, eliminating the need for a troubling singularity prior to the initial period of rapid inflation  — commonly known as the Big Bang —  needed by ‘beginning of time’ models. 

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