How Many Universes Are There?
PBS Space Time

How Many Universes Are There?

B1IntermediateNovember 14, 202623 min
  • One speaker
  • Science

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But just how many bubble universes does the eternally inflating multiverse contain?

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0:00

Space is big, but it's peanuts compared to the eternally inflating multiverse. But just how many bubble universes does the eternally inflating multiverse contain? What are they like? And most importantly, what can they tell us about aliens?

0:19

Imagine it. The observable part of our universe is 93 billion light years across. And that's just a small fraction of the stuff created in our big bang. But in the eternal inflation picture, ours is just one among uncountable bubble universes

0:41

– bubbles that are continuously appearing and growing within a vastly larger space time that itself expands at an exponentially accelerating rate. A greater inflationary space-time whose expansion never ends. We looked at the bizarre idea of eternal inflation in recent episodes, but we stopped short of

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