Infinite Worlds: A Journey through Parallel Universes

  • Published on: 18 March 2015
  • 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:
    Like us on Facebook:
    Follow us on twitter:

    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 00:00

    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.
  • Runtime : 1:43:58
  • Infinite Worlds Journey through Parallel Universes multiverse infinite universe Alan Guth Brian Greene Andrei Linde Paul Miller Nick Bostrom Robert Krulwich John Templeton Foundation cosmology DJ Spooky explore Infiniti many worlds world science festival full program 2009 Big Ideas Series


  • World Science Festival

    Hello, YouTubers. The World Science Festival is looking for enthusiastic translation ambassadors for its YouTube translation project. To get started, all you need is a Google account.Check out Infinite Worlds: A Journey through Parallel Universes to see how the process works: create your translation, just type along with the video and save when done.Check out the full list of programs that you can contribute to here: The World Science Festival strives to cultivate a general public that's informed and awed by science. Thanks to your contributions, we can continue to share the wonder of scientific discoveries with the world.

  • hidden xxx
    hidden xxx   1 weeks ago

    Can you edit the title to just "a journey through parallel universes" ?There is absolutely no evidence of other worlds, let alone that they are infinitely many in number.

  • Maverick74
    Maverick74   1 weeks ago

    During my short stint at M.I.T I had the good fortune of working with a Dr. that worked in a small lab located in the basement at Harvard and he proved to me the existence of a Parallel universe which was a lot like our universe but with small differences. He was able to prove how both universes vibrated at different frequencies which once he isolated the frequency of the other universe he was able to send/receive objects from the other side. Once he sent his lab partners car to the other side and never saw it again but did get a auto CD player in return. What made that so amazing was it was 1985 and our side hadn’t came out with CD players yet. The man had a 220 I.Q and was the most brilliant myopic S.O.B I’ve ever known.

  • Abdi Piano
    Abdi Piano   1 weeks ago

    So the big bang is the father of all universes? I thought big bang produced our universe only. My question is. What contained the big bang it self? Was big bang in an empty space that contains all universes including big bang itself?

  • Tom Loz
    Tom Loz   1 weeks ago

    It all makes sense now, can anyone else see it too?Look at the shape of a shell or any natural objects form. It's the cosmological constant pushing out.

  • Natalie Brown
    Natalie Brown   2 weeks ago

    There much more theories of the universe creation than UNIVERSES and most likely all of them are wrong.

  • Jason Naber
    Jason Naber   2 weeks ago

    Can the vacuum energy of the universe come from outside our universe?

  • b 0 t t i n i
    b 0 t t i n i   2 weeks ago

    41:32 Pro. BG looks like hes in the 80's with that hair hahahah.. Nothing but respect for Prof BG

  • davey dudely
    davey dudely   2 weeks ago

    people have a hard time with the infinite, given the temporal nature of our experience.infinite universes is not easy to comprehend in the usual way of understanidng

  • Rocco Gant
    Rocco Gant   2 weeks ago

    some of these so called " scientists " are smokin some really bad stuff......

  • Karina Hale
    Karina Hale   3 weeks ago

    I think there should be lots and lots of more people giving their relevant and scientific opinion about this topic; 5 guys is not enough

  • Sonic
    Sonic   3 weeks ago

    Inflation doesn't have enough evidence for it to say that it actually occurred. It's more likely that our univers is all there is and the big "bang" wasn't a bang at all but rather a bounce.

  • שחר פרידמן
    שחר פרידמן   3 weeks ago

    How is it ongoing forever - what about conservasion of energy? Enjoyed this massivey, enlightening

  • Terence David
    Terence David   3 weeks ago

    At -1:31:15 Mr. Green says and I quote .. "when things expand they cool off" .. lol .. really ?? Was that a mouse slip or should I say a lip slip.Is that even real science or pseudo theoretical scientism ?? coz things expand when heat is applied and they contract when cooled.Then Mr. Green comes up with "repulsive gravity suffusing space" and cheesy cheese analogies.. wtf ?? and that is science .. wowing the gullible, impressionable audience with repulsive pseudoscientific word saladry. Then he has a boring quintet of average musicians to qualify his quasi science. I've had enough, I'm outta here. It's the pseudo science circus, 50% of the bread n circuses programme.

  • Hubie Maddox
    Hubie Maddox   3 weeks ago

    The confusion comes in when you keep comparing this particular Universe to the Big BangBut what About how many Galaxies that might Exists with Many Universes that seem to Exist in Circles - as too how do they relate to the Big Bang🤨But even deeper then that, How does the Different Dimensions fit into the Big Bang & Does the “Flower of Life” have anything to Do with how Reality becomes Fairy tales

  • Zorgg 354
    Zorgg 354   3 weeks ago

    Elvis is not dead, he just went home

  • Computer Scientist
    Computer Scientist   3 weeks ago

    🙄It's "amazing" how these scientists in the 21st century 🍿are just now figuring out what the Ancients knew eons ago ... / what those of us from Generation X knew back in the 1970s and 80s from reading between the lines of what we used to call books 📚 handed to Us by an already back then orwellian staged up public school 🏫 system ... And don't get me wrong from the rolling of my eyes I don't dislike the presenter here I'm just irked that it took his colleagues and others as long as it did for them to get up to speed

  • I L M
    I L M   3 weeks ago

    “That why the choose finance” favorite line

  • Alkis05
    Alkis05   4 weeks ago

    1:42:28 That story and joke were so good that, alone at home, I started applauding along with the audience XD

  • Alkis05
    Alkis05   4 weeks ago

    My problem with simulation hypothesis is that it doesn't seem to explain anything that we can't explain without it.

    A PIRATE'S LIFE   1 months ago

    I don't believe that we're in the simulated universe because if we were we wouldn't be able to influence our reality with focused thoughts and intention. Also I believe that Space is some kind of liquid and gravity is more like electromagnetism. QUESTION: Is thought faster than light?

  • motokev
    motokev   1 months ago

    A small dense mass had all the mass in the universe ?Uhhhh, really ?Or are you saying the big bang energy was converted to mass as it cooled ?

  • motokev
    motokev   1 months ago

    I have a difficult time accepting the size of the universe.It doesn't make sense.So, something is going on that is Matrix related.

  • williamina vanbottle
    williamina vanbottle   1 months ago

    Does that mean we have infinite parallel left and right hemispheres of our brains...?What a load of bull.The Billy Graham of infinite mugs.

  • Solace
    Solace   1 months ago

    The music at the end was just plain weird

  • never mind
    never mind   1 months ago

    Whatever the truth is, I believe it is past the capabilities of our little monkey brains to understand.

  • Love God
    Love God   1 months ago

    What horseshit! parallel universes my!.Where's the evidence?

  • Sekeeta Helia Straatmans

    How can anyone who theorises about Big Bang or Multiverse OMIT/LEAVE OUT the Spirit of the Thinker??? In other words, Thinking must generate everything and because it (thinking)(the Power of Living Light) has many abilities and is invisible-it doesn't make sense to try make a 'model'. Thats because we Live it. We are the individualising model...

  • Mike Jones
    Mike Jones   1 months ago

    So would deja vu , be defined under parallel and multi verse , recoupling of mass??

  • Free-Naturalist
    Free-Naturalist   1 months ago

    So if the big bang is the beginning of space time, what is it expanding in amd what started it? 😄

  • Darrell Turner
    Darrell Turner   1 months ago

    When you can't figure out how our universe works, just invent an infinite number of them.

  • Richard Nelson
    Richard Nelson   1 months ago

    For anyone who believes this nonsense, that also means you now have the answer of how something comes out of nothing at all. Little quantum fluctuations dancing around. Btw, fluctuations of what

  • A Williams
    A Williams   1 months ago

    I put this on to fall asleep whileI listen I usually do this. But the fucking weird music put me in a different universe 🤣🤣🤣

  • Richard Nelson
    Richard Nelson   1 months ago

    Without even watching the video, the title of it suggests that it is science fiction that they will be talking about. Have they even seen one and where are they ? Science is standing on Shakey Ground these days

  • Observer
    Observer   1 months ago

    According to ancient literature called VEDA from India said that there are 14 BRAHMAND meaning 14 universes