String Theory Explained – What is The True Nature of Reality?

  • Published: 01 March 2018
  • Is String Theory the final solution for all of physic’s questions or an overhyped dead end?

    This video was realised with the help of Dr. Alessandro Sfondrini and it was funded by SNSF under Agora Grant n. 171622 and through the NCCR SwissMAP: The Mathematics of Physics.

    See also our video on the black-hole information paradox:

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    String Theory Explained – What is The True Nature of Reality?

Comments • 14 699

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    • Lyublyana Nikolova
      Lyublyana Nikolova  6 days back

      6:21 -1 is 3 quick math😂
      ok,I'm sorry,this is disrespectful

    • Just A Normal Youtuber Very Normal
      Just A Normal Youtuber Very Normal  2 weeks back

      Flov hi French

    • Venkatesh Namaji
      Venkatesh Namaji  1 months back

      Sir ❣️ please make a video about brain...
      Currently that we are don't know...
      And make some cool stuff about the Human body... universe...and new technologies...and much more... Love you sir...
      Totally addicted to your videos ❣️
      Your explaining way is awesome...
      Love from🇮🇳🇮🇳. Thank you..

    • Nikki Lorraine
      Nikki Lorraine  1 months back

      You really should post a correction note here or in the description explaining that you confused the heisenberg principle with the observer effect. It's the responsible thing to do.

  • zergmaster22
    zergmaster22  11 minutes back


    • DogPanda 2016
      DogPanda 2016  2 hours back

      Is the black duck swearing when he lost when a game that me! :v

      • Pickled Bird Spaghetti
        Pickled Bird Spaghetti  2 hours back

        Gravity: I'm not like the other forces

        • Chidi Akara
          Chidi Akara  15 hours back

          A misrepresentation of the heisenberg uncertainty principle. Oh my!

          • Adewale Adeyemi
            Adewale Adeyemi  15 hours back

            But hey.
            THAT'S JUST A THEORY.
            A FILM THEORY!

            • Philip Turner
              Philip Turner  19 hours back

              Just like....the single most stupid assertion of the human mind.

            • Philip Turner
              Philip Turner  19 hours back

              A blurry thing with a sphere of influence....sounds like me.

              • mishel mak
                mishel mak  24 hours back


                • Stefan Reich
                  Stefan Reich  1 days back

                  Can you really say "true nature of reality" and ignore *all spirituality* ?

                  Typical physics myopia

                  • Amy Pond
                    Amy Pond  2 days back

                    Hi!! I just wanted to say that I loved watching this video. Oh, I also wanted to ask that since you've done a video on string theory, could you guys do one on loop quantum gravity?? Besides that question just good job overall and i hope you guys keep up the good work👍

                    • malva_ diary
                      malva_ diary  2 days back

                      Truth of Universe can not be told it can only be experienced.

                      • Jeff Woo
                        Jeff Woo  2 days back

                        CN we just admit there is a GOD already 🤷‍♂️

                        • Jeff Boyd
                          Jeff Boyd  2 days back

                          This video was somewhat poorly done, because it left out some very fundamental pieces of string theory, which led to an incorrect explanation.

                          Of the 10 dimensions of space, 9 of them are considered to be sub-dimensions, of the larger one known as "The Bulk." In the bulk, theoretical "branes" exist and on each brain, different types of universes, each with unique physics could exist. It is for this reason, that string theory cannot simply explain our universe. In order for the math in string theory to work, the multiverse would need to exist, thus the showing of more than 3 dimensions of space, which would not explain our universe as the end all, be all of everything.

                          • Rita Medal
                            Rita Medal  2 days back

                            I only watched this because of Sheldon Cooper.

                            • galaxy guy
                              galaxy guy  2 days back

                              trainer: what are your grades of training string theory

                              me: 3:30

                              really i didnt learn it

                              • Vlad the Impaler
                                Vlad the Impaler  2 days back

                                If gravity could be unified with the other forces then what would that mean for us? As imperfect as our understanding of physics is many technologies and sciences have been developed from what little we know. So if we could enlarge our understanding by unifying gravity what exactly can we develop from that breakthrough? What machine, medicine, or chemistry could be possible if the unified field theory was complete?

                                • Ayush Anand
                                  Ayush Anand  2 days back

                                  At 2:07 you said with more wavelength more energy... It should be more frequency results in more energy. E = hc/wavelength

                                  • Nexus James
                                    Nexus James  2 days back

                                    [4:43] The Theory of Everything.



                                    [Geometry Dash flashbacks]

                                    • chu melon
                                      chu melon  3 days back

                                      i came here because of loona 💁

                                      • Sir Loin
                                        Sir Loin  3 days back

                                        Your videos make me cry

                                        • no name
                                          no name  3 days back

                                          Minus one that's three quick math

                                          • TheLogan47
                                            TheLogan47  3 days back

                                            Hello, Internet. Welcome to *String Theory*

                                            • ThE BiNdiNg iS fRaGiLe

                                              Vectors:allow us to introduce ourselves

                                              • ThE BiNdiNg iS fRaGiLe
                                                ThE BiNdiNg iS fRaGiLe  2 days back

                                                @cHriLLe oops corrected again xd aand btw thanks

                                              • cHriLLe
                                                cHriLLe  2 days back

                                                @ThE BiNdiNg iS fRaGiLe u spelled it wrong again. It's k u r z g e s a g t. I get ur joke tho its funny

                                              • ThE BiNdiNg iS fRaGiLe
                                                ThE BiNdiNg iS fRaGiLe  2 days back

                                                @cHriLLe corrected it bro

                                              • cHriLLe
                                                cHriLLe  2 days back

                                                Kuraguzat? 😂

                                            • Maury G
                                              Maury G  4 days back

                                              I think we will become a type 2 civi when we know everything about the universe

                                              • Snip x Hunt man
                                                Snip x Hunt man  4 days back

                                                String theory is nothing but a foolish answer to explain the theory of everything. Its like when you are under attack in a chess game, for example your bishop moves away from a danger square and it becomes safe but the bigger problem is that you left a gap for your king to be attacked. What Im saying basically is that we need to look at every theory so far, look at the bigger picture, the whole chessboard, not only one piece. What the person behind this theory deosn't realise is that he solved the problem between quantum physics and theory of relativity, but he introduced a bigger problem where he has to change every theory we found so far. There is a solution but we need to open our field of view wider. Look at the picture that is bigger than the big picture.

                                                • Michael's wayne Hamilton

                                                  Otherwise it goes bad, gravity fields fail and teachers the wrong together

                                                  • Dragan Miscevic
                                                    Dragan Miscevic  4 days back

                                                    Excellent explanation of complex principles! Thank you!

                                                    • Jonny Stephen
                                                      Jonny Stephen  4 days back

                                                      Me: heard Hyzeberg
                                                      My brain: Skyler i'm not in danger, i'm the danger!

                                                      • TurkeyForLive_XD :b
                                                        TurkeyForLive_XD :b  4 days back

                                                        BIG BRAIN!!!!

                                                        • Ya,Mü. Emirhan öztürk.


                                                          • Ya,Mü. Emirhan öztürk.


                                                            • Jason Alvarado
                                                              Jason Alvarado  5 days back

                                                              What about loop theory

                                                              • Pradeep kumar
                                                                Pradeep kumar  5 days back

                                                                Im fascinated!!!!!!!NO WORDS!!!!!!!

                                                                • PH. Graphics
                                                                  PH. Graphics  5 days back

                                                                  Damn you internet connection! I want to watch this video at 60fps! 😭

                                                                  • Foulty
                                                                    Foulty  5 days back

                                                                    Is it possible to move things with our vision if we are physically interacting with what we look at

                                                                    • whynottalklikeapirat
                                                                      whynottalklikeapirat  5 days back

                                                                      I am into Swing Theory

                                                                      • Wrath HD
                                                                        Wrath HD  6 days back

                                                                        90% of the comments are fake ass 5heads and are actual retards

                                                                        • ilmu011
                                                                          ilmu011  5 days back

                                                                          Welcome to YouTube.

                                                                      • T R U T H
                                                                        T R U T H  6 days back

                                                                        It doesn't exist.

                                                                        • aflah palara P
                                                                          aflah palara P  6 days back

                                                                          • Michael Vue
                                                                            Michael Vue  6 days back

                                                                            Who didn’t learn a thing??

                                                                            • swampthing401
                                                                              swampthing401  6 days back

                                                                              That Zelda reference was awesome

                                                                              • Marco Maiocchi
                                                                                Marco Maiocchi  6 days back

                                                                                Great video, just one thing. "True nature of reality", please stop using this sentence. It is a very dangerous one and it has doomed thinkers to run in circles until Wittgenstein finally solved the problem writing his Tractatus. When you say "true nature of reality" you mean just "that makes sense to us humans". How can the true nature of reality be so limited? It will never be contained into our human rules (math & language) and it will never be understable for us. Sad yes, maybe a bit too much philosophical, but it's key. Hawking was wrong, you cannot underestimate philosophy when thinking so big.

                                                                                • The Shadowgunner
                                                                                  The Shadowgunner  6 days back

                                                                                  0:34 When you use a really fancy transition in Powerpoint

                                                                                  • Pranav Chopra
                                                                                    Pranav Chopra  6 days back

                                                                                    Can't be go further like from point to string,and then from string to sheet?

                                                                                    • Thomas JR.
                                                                                      Thomas JR.  7 days back

                                                                                      This was your best video ever!! Very well written, no errors, all the info matches what I knew previously. Kudos

                                                                                      • Sean Pecson
                                                                                        Sean Pecson  7 days back

                                                                                        So bassically we made some kind of quasi religious belief/doctrine to explain the universe and everything? Who said sceience and religion can’t marry?

                                                                                        • Phos4us
                                                                                          Phos4us  7 days back

                                                                                          False, everyone knows reality is created by “universe stuff”