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Multiverse: One Universe or Many?

  • Multiverse: One Universe or Many?

    1:22:35

    The inflationary theory of cosmology, an enduring theory about our universe and how it was formed, explains that just after the Big Bang, the universe went through a period of rapid expansion. This theory has been critical to understanding what’s going on in the cosmos today. But now, this long-held notion—which seems to suggest as-yet-unproven and perhaps unprovable features such as the multiverse—is under increasing attack. Through informed debate among architects of the inflationary theory and its prime competitors, this program explored our best attempts to understand where we came from.

    This program is part of the Big Ideas Series

    The World Science Festival gathers great minds in science and the arts to produce live and digital content that allows a broad general audience to engage with scientific discoveries. Our mission is to cultivate a general public informed by science, inspired by its wonder, convinced of its value, and prepared to engage with its implications for the future.

    Subscribe to our YouTube Channel for all the latest from WSF.
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    Original Program Date: June 1, 2013
    MODERATOR: John Hockenberry
    PARTICIPANTS: Andreas Albrecht, Alan Guth, Andrei Linde, Neil Turok

    Multiverse: In the Beginning 00:04

    John Hockenberry's Introduction 4:33

    Participant Introductions 6:35

    The Big Bang theory. 8:34

    The vacuum of space and the Higgs field. 12:33

    What is inflationary theory? 15:40

    What does the inflationary model explain? 21:36

    What is the experimental evidence of the multiverse? 26:22

    What is so exciting about the Planck satellite?31:56

    The CMB and what it means to a multiverse. 40:43

    What came before the big bang? 46:45

    Does string theory help predict there is a multiverse? 53:45

    Having no choice is a hard choice to make. 1:00:33

    Is the horizon of a black hole is much like the edge of the universe? 1:05:11

    Is there a difference between a multiverse and two universes colliding? 1:11:23

    Depending on infinity for predictions. 1:16:15

  • Does the Multiverse Really Exist? |Space Science Documentary

    48:59

    The word “multiverse” has different meanings. Astronomers are able to see out to a distance of about 42 billion light-years, our cosmic visual horizon. We have no reason to suspect the universe stops there. Beyond it could be many—even infinitely many—domains much like the one we see. Each has a different initial distribution of matter, but the same laws of physics operate in all. Nearly all cosmologists today (including me) accept this type of multiverse, which Max Tegmark calls “level 1.” Yet some go further. They suggest completely different kinds of universes, with different physics, different histories, maybe different numbers of spatial dimensions. Most will be sterile, although some will be teeming with life. A chief proponent of this “level 2” multiverse is Alexander Vilenkin, who paints a dramatic picture of an infinite set of universes with an infinite number of galaxies, an infinite number of planets and an infinite number of people with your name who are reading this article.

  • Is our universe the only universe? - Brian Greene

    21:48

    Is there more than one universe? In this visually rich, action-packed talk, Brian Greene shows how the unanswered questions of physics (starting with a big one: What caused the Big Bang?) have led to the theory that our own universe is just one of many in the multiverse.

    Talk by Brian Greene.

  • Parallel Worlds Probably Exist. Here’s Why

    20:00

    The most elegant interpretation of quantum mechanics is the universe is constantly splitting
    A portion of this video was sponsored by Norton. Get up to 60% off the first year (annually billed) here: or use promo code VERITASIUM

    Special thanks to:
    Prof. Sean Carroll
    His book, a major source for this video is 'Something Deeply Hidden: Quantum Worlds and The Emergence of Spacetime'

    Code for solving the Schrödinger equation by Jonny Hyman available here:

    I learned quantum mechanics the traditional 'Copenhagen Interpretation' way. We can use the Schrödinger equation to solve for and evolve wave functions. Then we invoke wave-particle duality, in essence things we detect as particles can behave as waves when they aren't interacting with anything. But when there is a measurement, the wave function collapses leaving us with a definite particle detection. If we repeat the experiment many times, we find the statistics of these results mirror the amplitude of the wave function squared. Hence the Born rule came into being, saying the wave function should be interpreted statistically, that our universe at the most fundamental scale is probabilistic rather than deterministic. This did not sit well with scientists like Einstein and Schrödinger who believed there must be more going on, perhaps 'hidden variables'.

    In the 1950's Hugh Everett proposed the Many Worlds interpretation of quantum mechanics. It is so logical in hindsight but with a bias towards the classical world, experiments and measurements to guide their thinking, it's understandable why the founders of quantum theory didn't come up with it. Rather than proposing different dynamics for measurement, Everett suggests that measurement is something that happens naturally in the course of quantum particles interacting with each other. The conclusion is inescapable. There is nothing special about measurement, it is just the observer becoming entangled with a wave function in a superposition. Since one observer can experience only their own branch, it appears as if the other possibilities have disappeared but in reality there is no reason why they could not still exist and just fail to interact with the other branches. This is caused by environmental decoherence.

    Schrodinger's cat animation by Iván Tello
    Wave functions, double slit and entanglement animation by Jonny Hyman
    Filming of opening sequence by Casey Rentz

    Special thanks to Mithuna Y, Raquel Nuno and Dianna Cowern for feedback on the script

    Music from Experimental 1 Serene Story 2 Seaweed Colorful Animation 4

  • The Many Worlds of the Quantum Multiverse | Space Time | PBS Digital Studios

    12:53

    Is our universe a definitive single reality or is it merely one within an infinitely branching multiverse? Be sure to check out Physics Girl’s Dianna Cowern for more awesome science

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    The Copenhagen interpretation of quantum mechanics tells us that observation collapses a probability wave into a single definitive outcome, but this isn’t the only interpretation of quantum mechanics. The many worlds theory proposes that the wavefunction never actually collapses. The observer simply follows one of those many possible paths into their present reality while all the other paths continue on independent of the observer. Each of these paths branches off into an entirely different reality. In this episode Matt discusses the details of the many worlds theory and why it’s not so far-fetched to think that our reality is simply one of an infinite number of realities existing within space time.

    Links to sources:

    The Quantum Experiment that Broke Reality


    Hugh Everett's Ph.D. Dissertation


    Crazy Pool Vortex


    Previous Episode


    Written and hosted by Matt O’Dowd
    Produced by Rusty Ward
    Made by Kornhaber Brown (

  • Why is our universe fine-tuned for life? | Brian Greene

    21:48

    At the heart of modern cosmology is a mystery: Why does our universe appear so exquisitely tuned to create the conditions necessary for life? In this tour de force tour of some of science's biggest new discoveries, Brian Greene shows how the mind-boggling idea of a multiverse may hold the answer to the riddle.

    TEDTalks is a daily video podcast of the best talks and performances from the TED Conference, where the world's leading thinkers and doers give the talk of their lives in 18 minutes. Featured speakers have included Al Gore on climate change, Philippe Starck on design, Jill Bolte Taylor on observing her own stroke, Nicholas Negroponte on One Laptop per Child, Jane Goodall on chimpanzees, Bill Gates on malaria and mosquitoes, Pattie Maes on the Sixth Sense wearable tech, and Lost producer JJ Abrams on the allure of mystery. TED stands for Technology, Entertainment, Design, and TEDTalks cover these topics as well as science, business, development and the arts. Closed captions and translated subtitles in a variety of languages are now available on TED.com, at

    If you have questions or comments about this or other TED videos, please go to

  • Every Teen Titans Multiverse | Teen Titans GO! vs Teen Titans Movie | Cartoon Network

    2:58

    Did you know that there are many different versions of the Teen Titans from the DC multiverse? There are the Teen Titans, Teen Titans GO!, Baby Titans, The Night Begins to Shine Titans, and MANY more!

    Episode: Teen Titans GO! vs Teen Titans Movie

    Watch more Teen Titans Go ????

    About Teen Titans GO!:
    TEEN TITANS GO! is a comedy featuring the beloved DC heroes seen in a skewed light. They still fight crime and face classic villains, but mainly deal with all the issues of five teens rooming together -- chores, romantic tension, demon dad drop-ins and impromptu meatball parties. They also dance! The emphasis is on the odd everyday life of super heroes who haven't grown up.

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  • Do we live in a multiverse? | The Economist

    8:58

    It has long been thought that our universe is all there is, but it is possible we may live in just one of many. This is the second in our six-part series on unsolved mysteries in science. Read the accompanying article:

    Subscribe NOW to The Economist:

    When the ancients looked into the night sky they thought the heavens revolved around the earth and mankind. over the centuries this view has changed radically.

    We discovered we lived on a planet orbiting a star within the solar system and the solar system was found to be part of the Milky Way galaxy. Later we learned that our universe was filled with billions of other such galaxies - but could it be that we're committing the same error as our ancestors by thinking the universe contains everything there is? Could it be that we live in a multiverse?

    There are a number of different theories about what the multiverse could be. One proponent of the idea of the multiverse is Dr Tegmark of MIT. Dr Tegmark suggests a four fold classification of possible types of multiverse. The first type of multiverse is just an extension of what we already know our universe expanding into infinity rather than ending at the limits of our vision.

    We can look back almost to the beginning of time to the edge of the observable universe, but we can see no further. So the space beyond that distance known as the Hubble radius is literally out of sight. But that doesn't mean there isn't anything there.

    Because the expansion of the universe has stretched space, astronomers are able to see out to a distance of about 42 billion light years. How far things extend beyond this is unknown. If they stretch to infinity there could be numerous isolated universes cut off from one another by their own Hubble radius - depending on the observers vantage point.

    To understand the second type of multiverse in Dr Tegmark system it is first necessary to understand how the universe was formed and the theory of inflation. It was first conceived of by Alan Guth in 1979 and then later refined and expanded upon by Andrei Linde who had some key insights.

    This is one of the ideas of string theory which attempts to unify general relativity with quantum mechanics. The thinking is that all of the solutions produced by string theory that don't match up with what we can see in our own universe, may actually represent reality in other universes.

    The anthropic principle is the idea that our universe is fine-tuned to allow humans to live. A small fiddle with the strength of gravity for example and life as we know it would not exist - a coincidence that does not sit easily with scientists. The concept of a multiverse neatly addresses this problem within the infinite number of universes that could exist we are simply living in the one we are able to.

    In the third type Dr Tegmark multiverse in the first the laws of physics are the same from one to another. In this type though the component universes are separated not by distance but by time. At every moment within such a multiverse all of the possible futures allowed by the uncertainties of quantum mechanics actually happen.

    In the many worlds theory of the multiverse the entirety of the universe acts like the quantum photon, but instead of having two potential future states, every possible outcome would be manifested so our entire universe and everything within it, including you, would be constantly undergoing multiple visions into daughter universes - each with its own reality and future. Any given observer though would only see one outcome.

    In the final classification, the level 4 multiverse, Dr Tegmark proposes that all coherent mathematical systems describe a physical reality of some sort. Those different systems are of necessity different universes. What this last idea translates to in practice is hard to conceive of - it is more the province of metaphysics than physics, but the other three types of multiverse though they push the bounds of physical theory do not overstep them. Observational data supporting the theory of inflation have convinced some scientists that a multiverse is possible - but the idea is still controversial.

    It may be impossible to ever directly observe the multiverse but some scientists hope to eventually gather enough data supporting the theories that predict it to one day confirm its existence. If that were to happen, like the ancients before us, we would be given a whole new perspective on how the cosmos works and on our place in it.

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    The Economist videos give authoritative insight and opinion on international news, politics, business, finance, science, technology and the connections between them.

  • Parallel Universe or Multiverse Theory Documentary Why we may Live in a Multiverse

    1:09

    Parallel Universe or Multiverse Theory Documentary Why we may Live in a MultiverseParallel Universe or Multiverse Theory Documentary Why we may Live in a Multiverse

  • From Earth to Multiverse

    6:12

    Star Size Comparison - The Scale of the Universe And the Multiverse.

    The Multi-Universe Cosmos

    Source: Star Size Comparison 2 -
    Channel: morn1415 ©

    Credit: 1:05

    Music: Vangelis - Alpha


    Reupload

    * * *

    Star Size Comparison 3 ( Vortex V1 ):

    * * *

  • Infinite Worlds: A Journey through Parallel Universes

    1:43:58

    The multiverse hypothesis, suggesting that our universe is but one of perhaps infinitely many, speaks to the very nature of reality. Join physicist Brian Greene, cosmologists Alan Guth and Andrei Linde, and philosopher Nick Bostrom as they discuss and debate this controversial implication of forefront research and explore its potential for redefining the cosmic order. Moderated by Robert Krulwich and featuring an original musical interlude, inspired by parallel worlds, by DJ Spooky.

    This program is part of the Big Ideas Series, made possible with support from the John Templeton Foundation.

    The World Science Festival gathers great minds in science and the arts to produce live and digital content that allows a broad general audience to engage with scientific discoveries. Our mission is to cultivate a general public informed by science, inspired by its wonder, convinced of its value, and prepared to engage with its implications for the future.
    Subscribe to our YouTube Channel for all the latest from WSF.
    Visit our Website:
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    Original Program Date: June 13, 2009
    MODERATOR: Robert Krulwich
    PARTICIPANTS: Alan Guth, Brian Greene, Andrei Linde, Paul D. Miller, Nick Bostrom

    Introduction with Brian Greene 00:39

    Musical interlude 25:15

    Participant Introductions 33:49

    How do we know there was a Big Bang 35:50

    How do we get from a single universe to a multiverse. 47:14

    Is the universe expanding and how fast? 01:00:25

    What does six dimensional space look like? 01:08:00

    How do we know there is a multiverse? 01:13:48

    Bryce DeWitt on the multiverse concept 01:24:40

    What if we assume the universe is the simulation hypothesis? 01:37:14

    This program is part of The Big Idea Series, made possible with support from the John Templeton Foundation.

  • The True Science of Parallel Universes

    4:56

    Oh, Hey! MinuteEarth! .........and you can also subscribe to MinutePhysics!

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    Minute Physics provides an energetic and entertaining view of old and new problems in physics -- all in a minute!

    Music by Nathaniel Schroeder
    Drums by Jason Burger

    Thanks to Nima Doroud and TED-Ed for contributions.

    Created by Henry Reich Created by Henry Reich

  • Physics | The Architecture of the Multiverse

    2:15:57

    The multiverse is a hypothetical group of multiple separate universes including the universe in which humans live. Together, these universes comprise everything that exists: the entirety of space, time, matter, energy, the physical laws and the constants that describe them. The different universes within the multiverse are called the parallel universes, other universes or alternative universes.

  • Multiverse VS Parallel Universe - WTF Is The Difference? | SYFY WIRE

    2:54

    Avenger's Endgame and Spider-Man: Far From Home have introduced us to some pretty confusing time travel devices. Let's break it down.
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    More About Avenger's Endgame: Avengers: Endgame is a 2019 American superhero film based on the Marvel Comics superhero team the Avengers, produced by Marvel Studios and distributed by Walt Disney Studios Motion Pictures. It is the sequel to 2012's The Avengers, 2015's Avengers: Age of Ultron, and 2018's Avengers: Infinity War, and is the the 22nd film in the Marvel Cinematic Universe (MCU). It was directed by Anthony and Joe Russo, written by Christopher Markus and Stephen McFeely and features an ensemble cast including Robert Downey Jr., Chris Evans, Mark Ruffalo, Chris Hemsworth, Scarlett Johansson, Jeremy Renner, Don Cheadle, Paul Rudd, Brie Larson, Karen Gillan, Danai Gurira, Bradley Cooper, and Josh Brolin. In the film, the surviving members of the Avengers and their allies work together to reverse the damage caused by Thanos in Infinity War.

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    Multiverse VS Parallel Universe - WTF Is The Difference? | SYFY WIRE

  • Universe or Multiverse? With Thomas Hertog

    43:49

    For more cool science visit
    To the Edge of Time with Stephen Hawking.
    Yes, ladies and gentlemen! Another round of Science & Cocktails begins with rising star cosmologist and string theorist, the man who published with Stephen Hawking countless times, Thomas Hertog. Does time come to an end inside black holes? Do black holes exist forever? Did the universe have a beginning? Or was there something before the big bang? Is there only one universe or are there many? Can we hop from one universe to another? Why does the universe bother to exist at all? ? What was Stephen Hawking’s quantum theory of the origin of the universe? This is Thomas Hertog's description of this evening that will blow your mind: Stephen Hawking once said “My goal is simple: It is a complete understanding of the universe.” I have been fortunate to collaborate with Hawking to work towards this goal. Our search for a deeper understanding led us to realms of our universe at the edges of time. The end of time deep inside black holes, and the beginning of time at the big bang. Quantum theory rules the world at those edges. Its fuzziness and uncertainty means out of the big bang does not emerge a single universe but many universes - a multiverse. The multiverse challenges science as we know it, and Hawking wasn’t pleased. Thus we set out to weave the multiverse into a proper scientific model that is testable within our own universe. Universe or Multiverse? An inside story of how Hawking’s journey to the edges of time has reshaped our vision of the cosmos, and of ourselves.

  • Multiverse: One Universe or Many - World Science Festival 2013

    1:33:20

    Reproduced from the WSF Livestream page:

    Multiverse: One Universe or Many
    World Science Festival 2013
    Saturday, June 1, 2013 - 8:00 PM - 9:30 PM

    The inflationary theory of cosmology, an enduring theory about our universe and how it was formed, explains that just after the Big Bang, the universe went through a period of rapid expansion. This theory has been critical to understanding what's going on in the cosmos today. But now, this long-held notion—which seems to suggest as-yet-unproven and perhaps unprovable features such as the multiverse—is under increasing attack. Through informed debate among architects of the inflationary theory and its prime competitors, this program will explore our best attempts to understand where we came from.

    This program is part of the Big Ideas Series.

    Panel:
    John Hockenberry (Moderator)
    John Hockenberry is an award-winning journalist with twenty-five years experience in radio, broadcast television and print. He is the host of WNYC and PRI's The Takeaway, a correspondent for PBS Frontline, and a noted presenter and moderator at conferences such as TED, Aspen Ideas, and the World Science Festival.

    Andreas Albrecht (Theoretical Cosmologist)
    Andreas Albrecht is a leading theoretical cosmologist. He received his Ph.D. from the University of Pennsylvania in 1983 where, with Paul Steinhardt, he wrote one of the original papers on new or slow roll inflation.

    Alan Guth (Cosmologist)
    Alan Guth is a professor of physics at MIT, and world-renowned for his discovery of inflationary cosmology, the dominant cosmological paradigm for over two decades.

    Andrei Linde (Cosmologist)
    Andrei Linde is one of the authors of the inflationary universe scenario, which is gradually becoming the standard paradigm of modern cosmology. He invented its most popular versions: new inflation, chaotic inflation, and hybrid inflation.

    Neil Turok (Physicist)
    Neil Turok develops and tests fundamental theories of the cosmos. He pioneered the open inflation and cyclic universe models, as well as observational tests for dark energy and the nature of the relic perturbations using the microwave sky, both subsequently confirmed.

    Reproduced for educational purposes only and for no material gain.
    ©2013 Science Festival Foundation. All Rights Reserved.

  • Multiverse: One Universe or Many?

    1:10

    Could we be living in one of an infinite number of universes? The inflationary theory of cosmology seems to add weight to this as-yet-unproven (and perhaps unprovable) idea called the multiverse. But the notion of multiple universes is not without its opponents.

    Inflation, an enduring theory about our universe and how it was formed, proposes that just after the Big Bang, the universe underwent a period of rapid expansion. The theory has historically done a good job explaining a wide range of phenomena we see in the cosmos today. But to the extent this long-held notion also suggest we live in a multiverse, the theory is coming under attack. Through informed debate among architects of the inflationary theory and its prime competitors, Multiverse: One Universe or Many? explores our best attempts to understand whether our universe is unique—or one in a million million million.

    Original Program date: June 1, 2013
    Watch the full program here:

    The World Science Festival gathers great minds in science and the arts to produce live and digital content that allows a broad general audience to engage with scientific discoveries. Our mission is to cultivate a general public informed by science, inspired by its wonder, convinced of its value, and prepared to engage with its implications for the future.

    Subscribe to our YouTube Channel for all the latest from WSF.
    Visit our Website:
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  • Multiverse Theory, Explained

    3:17

    Business Insider UK spoke with astronomer Stuart Clark, author of Unknown Universe, about multiverse theory.

    He explained how a number of problems in physics and astronomy could be solved if there were an infinite number of other universes.

    He says: I think for me I would prefer it if there wasn’t a multiverse. If the universe that we see around us today is all that there actually is and that that spurs us on to find the meaning if you like in the laws of physics, the reason the universe is just this way and no different.

    But of course, the universe doesn’t have to care what I think or want. It will just do what it does.

    Tech Insider tells you all you need to know about tech: gadgets, how-to's, gaming, science, digital culture, and more.
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  • Why The Multiverse Might Be a Reality | Unveiled

    6:31

    Why The Multiverse Might Be A Reality ► Subscribe:

    We live in a universe, right? It's massive. It's expanding. But there's only one UNIverse... Right? Well, maybe not. The multiverse theory has long captured the imaginations of scientists and philosophers, but could it actually be true? Could there really be an infinite number of existences? And are we only seeing one of them? In this video, we find out.

    What do you think? Let us know in the comments, and tell us more questions you'd like us to explore!

    Find more mind bending videos to satisfy your curiosity here:

    What If the Earth Really Was Flat? -

    Where Does the Sky End and Space Begin? -

    #Multiverse #Universe #multiverseTheory #MeaningOfLife

  • Is There Really An Infinite Multiverse? | Stephen Hawkings Last Paper

    5:20

    Just a few days before he died, Stephen Hawking submitted one last research paper using string theory math to talk about the multiverse.

    Host: Hank Green

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  • Multiverse: One Universe or Many?

    1:23:15

    The inflationary theory of cosmology, an enduring theory about our universe and how it was formed, explains that just after the Big Bang, the universe went through a period of rapid expansion. This theory has been critical to understanding what’s going on in the cosmos today. But now, this long-held notion—which seems to suggest as-yet-unproven and perhaps unprovable features such as the multiverse—is under increasing attack. Through informed debate among architects of the inflationary theory and its prime competitors, this program explored our best attempts to understand where we came from.

    This program is part of the Big Ideas Series

    The World Science Festival gathers great minds in science and the arts to produce live and digital content that allows a broad general audience to engage with scientific discoveries. Our mission is to cultivate a general public informed by science, inspired by its wonder, convinced of its value, and prepared to engage with its implications for the future.

    Subscribe to our YouTube Channel for all the latest from WSF.
    Visit our Website:
    Like us on Facebook:
    Follow us on twitter:

    Original Program Date: June 1, 2013
    MODERATOR: John Hockenberry
    PARTICIPANTS: Andreas Albrecht, Alan Guth, Andrei Linde, Neil Turok

    Multiverse: In the Beginning 00:04

    John Hockenberry's Introduction 4:33

    Participant Introductions 6:35

    The Big Bang theory. 8:34

    The vacuum of space and the Higgs field. 12:33

    What is inflationary theory? 15:40

    What does the inflationary model explain? 21:36

    What is the experimental evidence of the multiverse? 26:22

    What is so exciting about the Planck satellite?31:56

    The CMB and what it means to a multiverse. 40:43

    What came before the big bang? 46:45

    Does string theory help predict there is a multiverse? 53:45

    Having no choice is a hard choice to make. 1:00:33

    Is the horizon of a black hole is much like the edge of the universe? 1:05:11

    Is there a difference between a multiverse and two universes colliding? 1:11:23

    Depending on infinity for predictions. 1:16:15
    Caption authors (English)
    NatalieCeline
    orenji jusu
    GenXDevil
    aamdolmx

  • How many universes are there? - Chris Anderson

    4:43

    View the full lesson:

    The fact that no one knows the answer to this question is what makes it exciting. The story of physics has been one of an ever-expanding understanding of the sheer scale of reality, to the point where physicists are now postulating that there may be far more universes than just our own. Chris Anderson explores the thrilling implications of this idea.

    Lesson by Chris Anderson, animation by Andrew Park.

  • The multiverse hypothesis: Is our universe the only one?

    3:51

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    In the past decades, the idea that our universe is only one of many, has become popular among physicists. If there are several universes, their collection is called the “multiverse”, and physicists have a few theories for this that I explain in this video.

    First, there is Eternal inflation
    Second, the String Theory Landscape
    Third, Many Worlds
    Fourth, the Simulation Hypothesis
    And fifth, the Mathematical Universe.

  • Does the Multiverse Exist? | Full Debate | Cumrun Vafa, Mary Jane Rubenstein, John Ellis

    10:26

    Watch the debate in full at

    Should we recognise our universe as the only universe and give up on others as fantasy science?

    Talk of other universes has become fashionable amongst physicists and is popular with the public. But the numbers seem hardly credible: string theory predicts 10500 parallel universes and some argue that the very idea of other universes is nonsensical. Should we recognise ours as the only universe and give up on others as fantasy science? Or is slipping through a worm hole into another universe a credible reality rather than a Hollywood fairytale? Harvard String Theorist Cumrun Vafa, Professor of Religion Mary Jane Rubenstein, and CERN theoretical Physicist John Ellis debate the possibility of the multiverse.

    Cumrun Vafa is a string theorist from Harvard University. He is the recipient of the 2008 Dirac Medal and the 2016 Breakthrough Prize in Fundamental Physics.

    Mary-Jane Rubenstein is Professor of Religion at Wesleyan University. She is the author of Strange Wonder: The Closure of Metaphysics and the Opening of Awe (2009) Worlds without End: The Many Lives of the Multiverse (2014), and Pantheologies: Gods, Worlds, Monsters (2018).

    John Ellis currently holds the Clerk Maxwell Professorship of Theoretical Physics at King's College in London. He is very active in efforts to understand the Higgs particle discovered recently at CERN, as well as its implications for possible new physics such as dark matter and supersymmetry. John Ellis was awarded the Maxwell Medal (1982) and the Paul Dirac Prize (2005) by the Institute of Physics.

    #multiverse #gravity #iaitv #physics #stringtheory #universe

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  • Infinite You and Quantum God: Multiverse Theory Grows, Challenges...Everything

    22:01

    Theoretical physicist Sean Carroll at California Institute of Technology is among the growing cadre of scientists embracing a kind of multiverse theory that builds on Schrodinger's insight about the power of observation to fix location of an object in the quantum realm. If a new universe is created each time a choice is made, along with multiple versions of the chooser, then infinite versions of you could be out there somewhere. Does this vast mystery point to an infinite intelligence -- a quantum God -- outside of time?

    You can enjoy all episodes of Bill Whittle Now with Scott Ott at our website, along with audio-only podcast versions, and many other shows, right now at

  • What If You Had Access To The Multiverse? | Unveiled

    9:54

    The Multiverse. The Many Worlds Theory. Parallel Universes... They're some of the most exciting and mind-bending theories in all of science. But what if the multiverse was proven true? And what if you alone had access to all of it?? In this video, Unveiled discovers what it would be like to travel the multiverse and unlock godlike powers!

    This is Unveiled, giving you incredible answers to extraordinary questions!

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    #Multiverse #ManyWorlds #WhatIf

  • Multiverse Theory: Are We A Part Of Infinite Parallel Realities?

    15:38

    Is our Universe just one of many in an infinite, ever-expanding multiverse? What exactly is the multiverse? Is it just a speculation of us humans or could it be that our universe is a part of a multiverse? In this article we will discuss these questions.
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    We have used the theory of multiple universes in cosmology, physics, philosophy, astronomy, religion, science fiction, comic books and fantasy. But we will look at the scientific aspect of it. We will only focus on the evidences and facts and observations made by astronomers and then draw a conclusion on the topic. 
    The three dimensional world which we witness in our daily lives may just be an illusion where there is no distinction between past, present and future. But how is it possible? How can we be so wrong about something so familiar? These questions bother almost all astronomers and physicist. It’s a groundbreaking possibility that opens up a whole different world for us. We will discuss an important Question. What if alternative Universes are being formed all the time? The Big Bang might not be a unique event. We might live In a duplicate parallel reality among the many other parallel realities.  Somewhere there’s a duplicate of you, me and everyone else. Are we in a Universe or a Multiverse? 
    Uniqueness is an idea so usual that no one questions it. A recent picture of the cosmos is coming to light, where nothing is unique. This recent picture challenges the notion of Uniqueness, in which duplicates of things are unavoidable. There might be duplicates, not only of objects but of me, you and everyone else.  And if it’s right, where are they? Why haven’t we seen them? There was a time when the word Universe meant everything that existed, the notion of more than one universe seemed impossible. But if we go beyond our Milky Way and even beyond the distant galaxies and beyond the end of the observable Universe, we might find that our Universe is not alone. There might be other Universes, in-fact, there might be new universes being born all the time might have stars and even a planet that looks familiar. We may be live in an expanding sea of Multiverse! Some of these might not have the basic requirements for the formation of matter. Others might have planets, stars and Galaxies that look familiar to us but with a slight difference. And if there are many other Universes out there, some might be even identical to ours except for the slightest Details. For Example, in any other parallel reality, it might be possible I am the Prime Minister of India. And if the multiverse exists, we will have to encounter a lot of possibilities that might exist. There could be other places where duplicates of me would exist and would think, act and speak in the same way as I do, but with some slight differences. 
    Is it science, is it religion, is it Philosophy? As a Physicist we should not and we don’t ask these questions. We follow the logic, and the logic leads there. There was a time when people thought Earth was at the centre of the Cosmos and everything else that exists revolved around us. Then scientists like Galileo and Copernicus showed us it’s the sun that’s at the centre of our solar system. And our solar system is just a little neighbourhood in our Gigantic Galaxy. And our galaxy, it’s among the billions of galaxies that make up our universe. These ideas sounded shocking and outrageous when they were first suggested, but now we don’t even think to question these ideas. The idea of different alternate universes or the multiverse might be the same.  It just requires a radical change in our perspective of the cosmos. 
    So let’s talk about where did the idea of Multiverse came from? What are the evidences of its existence? Well, a lot of astonishing discoveries and theories have suggested we may be a part of the multiverse. The very first among them is the Big Bang, the theory of the origin of our universe. According to this theory, our Universe began 13.8 billion years ago in a very hot and dense, violen* explosio* of a very tiny primordial nugget. Over millions and millions of years the universe cooled down and it lead to the formation of Stars, galaxies and planets. The universe is still expanding because of that explosio*. But there’s one major piece of this theory that’s missing. The Big Bang tells nothing about what caused the explosio*, throwing everything outwards. What caused the BANG? So, what furled the violen* explosio*? What force could set everything moving outwards? 
    In 1979, a young physicist Alan Guth laid the foundation of the idea of the multiverse.

    Written By Prayag Pandey

    #InsaneCuriosity #MultiverseTheory

  • Do We Live in a Multiverse?

    10:06

    Chances are there's another you, watching this video in another universe, except you're dressed like a clown and drinking maple syrup from a shoe.

    Read my article on this topic here:

    All images courtesy of Creative Commons or protected under Fair Use. For questions or concerns about the use of any media, please contact the page directly.

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  • Newton Lecture 2009: Is our universe part of a multiverse

    40:00

    The winner of the 2009 Newton Medal, Professor Alan H. Guth presents a lecture to a captivated audience at the Institute of Physics.

    For more Newton winner lectures visit

  • MULTIVERSE THEORY EXPLAINED

    9:51

    I’ve always been fascinated by the mind-blowing idea of the multiverse and I still remember the first time I heard about it - from a documentary I was watching, presented by Neil deGrasse Tyson.

    Today I’m exploring the various multiverse theories and I hope you enjoy the video as much as I enjoyed making it!

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    TIME STAMPS:
    What is the multiverse? - 0:00
    Infinite patchwork multiverse - 0:17
    Bubble Universes - 1:21
    Membrane Universes - 2:45
    Many Worlds Theory - 4:45
    Mathematical Structure Universes - 5:54
    Criticism of the Multiverse - 6:24
    In defence of the Multiverse - 6:37
    Evidence of the Multiverse - 8:40

  • The Multiverse: Whats Real? | Episode 1801 | Closer To Truth

    26:48

    Is the multiverse real? What could be more startling than many universes – multiple universes, innumerable universes, perhaps an infinite number of universes? But does the multiverse really exist? Featuring interviews with Max Tegmark, Laura Mersini-Houghton, Paul Davies, Andreas Albrecht, Alan H. Guth, Anthony Aguirre, and Carlo Rovelli.

    Season 18, Episode 1 - #CloserToTruth

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    Closer To Truth host Robert Lawrence Kuhn takes viewers on an intriguing global journey into cutting-edge labs, magnificent libraries, hidden gardens, and revered sanctuaries in order to discover state-of-the-art ideas and make them real and relevant.

    ▶Free access to Closer to Truth's library of 5,000 videos:

    Closer to Truth presents the world’s greatest thinkers exploring humanity’s deepest questions. Discover fundamental issues of existence. Engage new and diverse ways of thinking. Appreciate intense debates. Share your own opinions. Seek your own answers.

    #Multiverse #Cosmos

  • Sean Carroll explains: are many worlds and the multiverse the same idea?

    1:23

    We present you the knowledge and wisdom of one of the top scientists on this planet, Sean Carroll.

    All Sean Carroll Explains videos are here:

    All What is..? videos are here:

    Sean Carroll is a theoretical physicist specializing in quantum mechanics, gravity and cosmology. He is a research professor in the Department of Physics at the California Institute of Technology. He has written several books and published in scientific journals such as Nature as well as other publications, including New York Times, Sky & Telescope, and New Scientist.

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  • Brian Greene - The Hidden Reality: Parallel Universes - The Multiverse

    33:00

    Brian Greene is an American theoretical physicist, mathematician, and string theorist. He has been a professor at Columbia University since 1996 and chairman of the World Science Festival since co-founding it in 2008.

  • Can All The Universes Fit In The Multiverse? - with Sean Carroll

    4:52

    Getting your head around the implications of the many worlds theory can be an almost incomprehensible task.
    Subscribe for regular science videos:

    In this short clip from the Q&A following his talk on quantum mechanics, theoretical physicist Sean Carroll explores how we can conceive of the branches of the universe and how they could all fit.

    Watch the full talk:

    Sean M Carroll is a theoretical physicist, specialising in quantum mechanics, gravitation, cosmology, statistical mechanics, and foundations of physics, with occasional dabblings elsewhere. His official titles are Research Professor of Physics at Caltech and Research Professor at the Santa Fe Institute. He lives in Los Angeles with his wife, writer Jennifer Ouellette.

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  • A Journey into The Multiverse

    13:22

    Does the Multiverse Exist? - The Multiverse Theory Explained
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    What is the multiverse? Is the multiverse real? Everyone has thought about parallel universes at one time or another. It seems almost inevitable that these other worlds do exist, but we just can't find a hint of evidence for them. Is there anything outside our universe? Well, there just might be.

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    ???? Some of my favorite books:

    Pale Blue Dot: A Vision of the Human Future in Space by Carl Sagan


    A Universe from Nothing by Lawrence M. Krauss:


    What If?: Serious Scientific Answers to Absurd Hypothetical Questions


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    The Grand Design by Stephen Hawking:


    How to Win Friends & Influence People by Dale Carnegie:


    Crushing It by Gary Vaynerchuk:


    The Intelligent Investor by Benjamin Graham:

  • From Universe to Multiverse

    10:40

    Are we on the brink of a new Copernican revolution? Theoretical physicist Dr. Michio Kaku brilliantly helps us visualise what the truth lurking out there might be. More from

  • How To Find A Multiverse | Laura Mersini-Houghton

    10:29

    Watch this short pitch in full at

    Theoretical physicist from University of North Carolina Laura Mersini-Houghton reveals how the latest snapshots from the Planck satellite yield evidence for parallel universes.

    Laura Mersini-Houghton is a cosmologist and theoretical physicist, and professor at the University of North Carolina at Chapel Hill. She is a proponent of the multiverse hypothesis and the author of a theory for the origin of the universe that holds that our universe is one of many selected by quantum gravitational dynamics of matter and energy. Predictions of her theory have been successfully tested by astrophysical data. She argues that anomalies in the current structure of the universe are best explained as the gravitational tug exerted by other universes.

    #physics #bigbang #multiverse #debate #cosmology #multiverse

    Visit IAI.tv for our full library of debates, talks, articles and podcasts from international thought leaders and world-class academics. The Institute of Art and Ideas features videos and articles from cutting edge thinkers discussing the ideas that are shaping the world, from metaphysics to string theory, technology to democracy, aesthetics to genetics.

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  • Michio Kaku: The Multiverse Has 11 Dimensions | Big Think

    2:25

    Physicist Michio Kaku explains why other universes in the mulitverse could have many more dimensions—and could comprise Einstein's Mind of God.
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    Dr. Michio Kaku is the co-founder of string field theory, and is one of the most widely recognized scientists in the world today. He has written 4 New York Times Best Sellers, is the science correspondent for CBS This Morning and has hosted numerous science specials for BBC-TV, the Discovery/Science Channel. His radio show broadcasts to 100 radio stations every week. Dr. Kaku holds the Henry Semat Chair and Professorship in theoretical physics at the City College of New York (CUNY), where he has taught for over 25 years. He has also been a visiting professor at the Institute for Advanced Study as well as New York University (NYU).
    ----------------------------------------------------------------------------------
    TRANSCRIPT:

    Question: Are there only three dimensions in other universes or could there be more? (Submitted by Andre Lapiere)

    Michio Kaku: Andre, we believe, though we cannot yet prove, that our multiverse of universes is 11-dimensional. So think of this 11-dimensional arena and in this arena there are bubbles, bubbles that float and the skin of the bubble represents an entire universe, so we’re like flies trapped on fly paper. We’re on the skin of a bubble. It’s a three dimensional bubble. The three dimensional bubble is expanding and that is called the Big Bang theory and sometimes these bubbles can bump into each other, sometimes they can split apart and that we think is the Big Bang. So we even have a theory of the Big Bang itself. Now you ask a question what about the dimensions of each bubble. Well in string theory—which is what I do for a living; that's my day job—in string theory we can have bubbles of different dimensions. The highest dimension is 11. You cannot go beyond 11 because universes become unstable beyond 11. If I write down the theory of a 13-, 15-dimensional universe it’s unstable and it collapses down to an 11-dimensional universe. But within 11 dimensions you can have bubbles that are 3 dimensional, 4-dimensional, 5-dimensional. These are membranes, so for short we call them branes. So these branes can exist in different dimensions and let’s say P represents the dimension of each bubble, so we call them p-branes. So a p-brane is a universe in different dimensions floating in a much larger arena, and this larger arena is the hyperspace that I talked about originally.

    Also remember that each bubble vibrates, and each bubble vibrating creates music. The music of these membranes is the subatomic particles. Each subatomic particle represents a note on a vibrating string or vibrating membranes. So, believe it or not, we now have a candidate for the Mind of God that Albert Einstein wrote about for the last 30 years of his life. The Mind of God in this picture would be cosmic music resonating throughout 11-dimensional hyperspace.
    ----------------------------------------------------------------------------------
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  • Top 10 Theories the Multiverse is a Real Possibility

    8:47

    Top 10 Theories the Multiverse is a Real Possibility! It seems like some parts of society and pop culture are coming to terms with the fact that our reality isn’t quite as black and white as we thought. I mean, it’s about time, right? We couldn’t be convinced that our 5 senses were all that there is. Are parallel universes real? Let’s look at the top 10 reasons this multiverse theory could be a real possibility!

    Watch other videos like this!

    Top 10 SCARY Sounds From Outer Space


    10 CRAZY Discoveries that Science Can’t Explain


    Top 10 SCARY THINGS that Will Happen in the Future


    10. The Schrödinger's Cat Theory
    9. Bubble Universes
    8. Beginning and End
    7. Parallel Universes
    6. Observational Evidence
    5. Daughter Universes
    4. The Universe Is Just Too Big
    3. Math and Stuff
    2. Just Too True, For An Atheist
    1. Rules On Time Travel

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    #top10 #theories #multiverse

  • Putting The Multiverse To The Test

    5:23

    Perimeter Associate Faculty member Matthew Johnson explains the related concepts of inflation, eternal inflation, and the multiverse. The multiverse hypothesis, he argues, is more than metaphysics -- the idea that there might be other universes can be scientifically tested.

    For the FQXi Show Me the Physics Video Contest: #FQXiVideoContest2014

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  • NOVA | The Fabric of the Cosmos with Brian Greene: Universe or Multiverse?

    31

    Premieres Wednesday, November 16 at 9PM/8c on PBS.

  • What is the Multiverse?

    5:36

    Are there multiple YOU's out there? Physicist Brian Greene explains the theory of the multiverse, his cover story in this week's Newsweek, where different universes and laws might exist.

  • Is the multiverse real?

    7:55

    Parallel universes could be out there, and they might provide answers to some of science’s biggest mysteries.
    Find out more on the science behind this video:
    Evidence for parallel universes – interview with Max Tegmark
    Research by Max Tegmark on parallel universes

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  • One Universe Theory

    8:46

    This videos explains a three dimensional process of continuous energy exchange that forms the ever changing world of our everyday life. The reason why this process can be explained in just three dimensions is because in uses the holographic principle in the form of positive and negative charge forming a dynamic two dimensional boundary condition. In such a theory the extra dimensions of String Theory and parallel universes of the Many Worlds Interpretation are just future possibilities and opportunities in our one 3D Universe. We have an emergent future continuously unfolding with the spontaneous absorption and emission of light forming a process of continuous energy exchange that we see and feel as the flow of 'time' itself with the future coming into existence photon by photon. The wave particle duality of light is continuously forming a blank canvas that we can interact with forming the possible into the actual! This universal process is unfolding within an infinite number of dynamic interactive reference frames that are continuously coming in and out of existence. Some people find it hard to believe that everything could be based on one universal process that can be explained by physics. I think this is because of the great diversity of the atoms of the periodic table and because we have phase changes in matter at different temperatures. Also we have the four fundamental forces that have to be explained within a universal process for this to be possible. Add to this at high temperature we have matter changing into plasma, so it is not surprising people find it difficult to comprehend. This video explains a simple process that is relative to the atoms and the four fundamental forces. It is also relative to temperature with the phase changes of matter solid, liquid, gas and plasma.

  • Alan Guth - Inflationary Cosmology: Is Our Universe Part of a Multiverse?

    1:19:12

    Anna I. McPherson Public Lecture 2018 -- McGill University
    January 18, 2018

    A public talk by Dr. Alan Guth
    Massachusetts Institute of Technology
    The physicist who first developed the idea of cosmic inflation -- the theory that the Universe underwent a period of rapid expansion shortly after the Big Bang.

    Inflationary cosmology gives a plausible explanation for many observed features of the universe, including its uniformity, its mass density, and the patterns of the ripples that are observed in the cosmic microwave background. Beyond what we can observe, most versions of inflation imply that our universe is not unique, but is part of a possibly infinite multiverse. I will describe the workings of inflation, the evidence for inflation, and why I believe that the possibility of a multiverse should be taken seriously.

  • More than one Universe? Multiverse - Documentary

    55:47

    Whether you believe our universe is unique or one of many coexisting realities, there's a scientific model that backs up your views. Cosmologists on both sides debated the issue June 1 at the Multiverse: One Universe or Many? panel at the World Science Festival.

    Is the multiverse idea something that's implied by deficiencies in existing cosmological theories, or is it something some scientists need to help them explain certain unresolvable problems in existing theory? journalist John Hockenberry asked, acting as moderator to scientists Andreas Albrecht, Alan Guth, Andrei Linde, and Neil Turok, who took the stage at New York University's Skirball Center for the Performing Arts.

    The possibility of a multiverse is raised by the theory of cosmic inflation. This idea posits that the universe grew exponentially in the first fraction of a second following the Big Bang, expanding even faster than the speed of light. Some versions of this theory suggest that certain areas of the universe expanded faster than others, creating separate bubbles of space-time that might have developed into their own universes.

  • Multiverse: In the Beginning

    4:43

    What if the big bang that produced our universe wasn't the only one? Is it possible that universes are being created all the time? Some scientists suspect a theory supposing a collection of universes—dubbed the multiverse—could answer many of the questions surrounding our origins and the nature of space-time. But the notion of multiple universes is not without its opponents. Take a visual tour from the beginning of time all the way to the roiling debate amongst physicists today.

    Watch the full program here:
    Original Program date: June 1, 2013

    The World Science Festival gathers great minds in science and the arts to produce live and digital content that allows a broad general audience to engage with scientific discoveries. Our mission is to cultivate a general public informed by science, inspired by its wonder, convinced of its value, and prepared to engage with its implications for the future.

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  • Marvels Guide to the Multiverse

    16:31

    We're back, baby!

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    Who are you within this vast multiverse? -The Ancient One

    Marvel is big. Even as far as fictional settings are concerned, few have literally infinite universes to explore. So, how big is infinity? And does anything out there relate to anything in here? Alternate realities and higher planes of existence are just science fiction tropes, right? Today, we're exploring every possible timeline. Every conceivable past, present, and future of the characters you know and love, along with the characters you don't know and hate. How do they exist? Why do they exist? And what happens if their existence gets a little out of control? Strap in and DON'T PANIC!

    Have a question? Ask in the comments, or e-mail us at asktheimaginaryaxis@gmail.com

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    How do Poké Balls Work?


    Visit the Marvel Database for all your multiversal needs!


    Multiverse Theories






    Eternal Inflation






    Quilted Multiverse Theory


    Schrodinger's Cat




    Many Worlds Interpretation





    Further Multiverse Theories and Classifications




    String Theory






    M-Theory








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  • Distant time and the hint of a multiverse - Sean Carroll

    15:55

    Cosmologist Sean Carroll attacks -- in an entertaining and thought-provoking tour through the nature of time and the universe -- a deceptively simple question: Why does time exist at all? The potential answers point to a surprising view of the nature of the universe, and our place in it. (Filmed at TEDxCaltech.)

    Talk by Sean Carroll.

  • Do We Live In A Multiverse? Featuring Brian Keating

    35:02

    John Michael Godier and Brian Keating discuss the earliest moments of our Universe and whether future findings will lead to the discovery of a multiverse.

    Brian Keating is a professor of physics at the Center for Astrophysics & Space Sciences (CASS) in the Department of Physics at the University of California, San Diego and author of Losing the Nobel Prize: A Story of Cosmology, Ambition, and the Perils of Science's Highest Honor.

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