Cosmic Queries: The Multiverse

Hypothesized disks in the cosmic microwave background (CMB) from the early universe, indicating that another bubble universe had collided with our universe. Image credit: Perimeter Institute. Caption credit and image source:

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About This Episode

Itching to know more about the multiverse? You’re not alone! Join us when Neil deGrasse Tyson and theoretical physicist and cosmologist Paul Steinhardt answer fan-submitted questions about cosmology chosen by co-host Chuck Nice. We’re not promising anything, though, because while there are plenty of intriguing questions, there aren’t many definitive answers when it comes to quantum physics and trying to understand how the universe moved from a quantum state to a classical one governed by general relativity. Join us anyway, as we explore concepts like cosmic inflation, quantum tunneling, and whether gravity is extra-dimensional. Neil and Paul discuss whether the perception of time would be consistent across the multiverse, and whether reality and gravity are granular. Find out about the difference between the Big Bang and the Big Bounce. Compare the concept of parallel universes with that of an ekpyrotic “meta-universe” that had no singularity at its birth, where space and time have existed forever, and where quantum fluctuations at the start of this cycle have given birth to causally separated regions that, though they can never know about each other due to distance and the limitations of the speed of light, are nonetheless connected by the fabric of spacetime.

NOTE: All-Access subscribers can listen to this entire episode commercial-free here: Cosmic Queries: The Multiverse.

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  • Charlet Burcin

    How important is the cold spot in the universe that has been discovered and is it related to the multiverse hypothesis? charlet

  • Nqina Dlamini

    I want to watch it (as Dr Neil, said you’ve been listening or WATCHING). Where do I watch it? The YouTube channel only shows 2-5minute snippets at random updates.

    • We are rolling out a new service, StarTalk All-Access, which will let you watch videos of our episodes ad-free. Not all seasons were filmed, but Seasons 6 and 7 will eventually be available for view as we continuously add more content each week.

  • Betsy Mackenzie

    Love the show, but I miss having the title & artist of the songs listed in the episode description- it made them a lot easier to look up when there was one I liked. Any plans to bring that back? Thanks!

    • Betsy, it’s a temporary programming glitch in the new website that we’re working on fixing.
      The song list will be back shortly.

      • Betsy Mackenzie

        Great to hear, thank you!

  • Aakash Mandal

    I need to ask one question from niel.It is very important.I want to know the what role does entropy play in the fate of universe.Does entropy help universe evolve accordingly?

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