The Most Dangerous Stuff in the Universe - Strange Stars Explained

  • Published: 14 April 2019
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    Inside neutron stars we can find the weirdest and most dangerous substance in the universe: Strange matter. What is strange matter, how dangerous is it and what can it tell us about the origin of the universe?

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Comments • 14 065

  • Kurzgesagt – In a Nutshell

    To support Kurzgesagt and learn more about Brilliant, go to and sign up for free. The first 688 people that go to that link will get 20% off the annual Premium subscription.

    • cyka neu
      cyka neu  2 days back


    • Jenny Scott
      Jenny Scott  3 days back

      Thank you 😊 for your support and your name and the best for your as well as your own personality

    • Pandasss
      Pandasss  1 weeks back

      What happens if it toishes a human? Will it turn us to superheroes 😂 ?

    • Anthony Umana-Paniagua
      Anthony Umana-Paniagua  2 weeks back

      I past the 6th grade 😀

    • conmadben
      conmadben  4 weeks back

      Thx guys. I needed my monthly does of existencial crysis...

  • Satya Panigrahi
    Satya Panigrahi  2 hours back

    Frightening, mesmerizing and absolutely beautiful.😍

    • Putri putriii
      Putri putriii  3 hours back


      • Putri putriii
        Putri putriii  3 hours back


        • Roasted Toast
          Roasted Toast  13 hours back


          thanos:as everything should be...

          • Chief Hamhawk
            Chief Hamhawk  15 hours back

            “All the empty space is now filled with particles that really don’t want to be close to each other.”

            You just summarized every school dance ever

            • Sage Blyth
              Sage Blyth  1 days back

              2:19 That's the cutest thing I've seen today

              • SirDoi
                SirDoi  1 days back

                Did Dr. Strange make this matter to bend rules?

                • Shounak Kale
                  Shounak Kale  2 days back

                  Very nice video

                  • Charmaine Russell
                    Charmaine Russell  2 days back

                    I would like to forget about strangelets....

                    • MrMoticuko
                      MrMoticuko  2 days back

                      Stranger Things confirmed

                      • Kelsang Gyudzhin
                        Kelsang Gyudzhin  2 days back

                        2:31 Oh god their little faces I love them I just can't even XD

                        • Kutluhan Bilgeşah Bayzan

                          What if humans use strangelets for weapon world and galaxy is be die.

                          • Iustinian Motac
                            Iustinian Motac  2 days back

                            Thank you for existing.

                            • Taufik Nur Rahmanda
                              Taufik Nur Rahmanda  3 days back

                              I have a different though about this. I think the core of neutron star is a very small singularity and maybe that's a dark matter; no light can illuminate it and it's not harmful, it bends space and time but can't interact with physical thing because of its size. This is just my hypothesis though.

                              • TheFamousArthur
                                TheFamousArthur  3 days back

                                Where are CHARM, BOTTOM, and TOP quarks?

                                • Albert25012501
                                  Albert25012501  3 days back

                                  So....that would be a really bad idea to forge THAT hammer for Thor.....

                                  • Cassia Chloe
                                    Cassia Chloe  3 days back

                                    this animator must smoke a lot of dmt

                                    its beautiful

                                    • Bianca Pilichi
                                      Bianca Pilichi  3 days back

                                      Kurzgesagt's videos always give me a slight, ancestral anxiety

                                      • mtilford
                                        mtilford  3 days back

                                        So...Strange matter might work like Vonnegut's "Ice-9?" Between this and the potentially lurking vacuum decay catastrophe, I don't even know why I put on pants anymore.

                                        • 윤우성
                                          윤우성  3 days back


                                          • Dan Cooper
                                            Dan Cooper  3 days back

                                            I'm not going to worry about it.

                                            • Eurus
                                              Eurus  3 days back

                                              doctor strange: hOLD MY BEER

                                              • P G
                                                P G  3 days back

                                                So that is a tiberium.

                                                • keith dunham
                                                  keith dunham  3 days back

                                                  really an ad about tat stupid ark in kentucky ??

                                                  • SCRUMB
                                                    SCRUMB  4 days back

                                                    Strange matter: *Exist*
                                                    Dr strange: Strange up boi!

                                                    • Nathan Stene
                                                      Nathan Stene  4 days back

                                                      Hey, I study physics in Brussels and I'm reading a few scientific articles on the subject. In particular, it's been 35 years we know strangelets are not dangerous whatsoever. Here it is, supported by all background and calculations you might want to check :

                                                      "If quark matter with strangeness is bound, then energetically it can grow indefinitely by absorbing nucleons. On might at first think that quark matter would be dangerous in contact with ordinary matter, but this is not the case. [...] To balance the chemical potential difference, there will be an almost equal electrostatic potential of +50MeV at the surface of (and throughout) a nugget of quark matter, this potential will be more than adequate to repel positively charged nuclei at ordinary temperatures or at reasonably low velocities. Quark matter is in this respect no more dangerous than oxygen." Edward Witten, "Cosmic separation of phases", Physical Review D,1984

                                                      Also, I have checked your source for your "end of the world" theory - your source EXPLICITELY says the scenario is unlikely because it would mean having negatively charged strangelets. Once again I'm a bit disappointed by the way you guys transmit scientific information.

                                                      • XL Gamer
                                                        XL Gamer  4 days back

                                                        Wait he if a strange matter enter to our atmosphere so it will transform our atmosphere to strangemoshper
                                                        so it is meaning...........

                                                        SmOkE wEeD eVeRyDaY
                                                        (don't use weed for you and people who loves you)
                                                        (Sorry for bad my bad english there is can be mistakes)

                                                        • Da Drumma
                                                          Da Drumma  4 days back

                                                          Maybe strange matter is the ultimate form of existence and we're fools to resist assimilation.

                                                          • LegendaryDoge
                                                            LegendaryDoge  4 days back

                                                            How to make this video 2 second long

                                                            Strange Matter is Strange

                                                            • Adasha Stewart
                                                              Adasha Stewart  4 days back

                                                              Being that black holes are possibly natural universal time machines I don't know if throwing strange matter into one is a good idea if we had the means to do so. You're literally shooting in the dark

                                                              • World Shell
                                                                World Shell  4 days back

                                                                Who knows this strange stuff can be used as unlimited power source that could disobey thermodynamic laws

                                                                • Depopa
                                                                  Depopa  4 days back

                                                                  thanks for the anxiety

                                                                  • Fancy Hotdog
                                                                    Fancy Hotdog  4 days back

                                                                    Kurzgesagt: Perfectly dense, perfectly stable, indestructible.

                                                                    My brain: *Perfectly balanced, as all things should be*

                                                                    • Regine Young
                                                                      Regine Young  4 days back


                                                                      • Aristides e a Galáxia


                                                                        WHATS HAPPEN WITH THE FINAL BIRD

                                                                        • Oliveer Mitteer
                                                                          Oliveer Mitteer  4 days back

                                                                          Warum ist da ein Fidget Spinner im Thumbnail ?
                                                                          English: Why is there a Fidget Spinner in the Thumbnail ?

                                                                          • MLG Master
                                                                            MLG Master  4 days back

                                                                            If you think we’re gonna freeze to death without a brilliant bright sun come to Manchester we don’t see the sun we see gray gray gray

                                                                            • MLG Master
                                                                              MLG Master  4 days back

                                                                              D E N S E

                                                                              • ganymede242
                                                                                ganymede242  5 days back

                                                                                Quark should rhyme with quart, not fart. From Murray Gell-Mann "The Quark and the Jaguar": "In 1963, when I assigned the name "quark" to the fundamental constituents of the nucleon, I had the sound first, without the spelling, which could have been "kwork". Then, in one of my occasional perusals of Finnegans Wake, by James Joyce, I came across the word "quark" in the phrase "Three quarks for Muster Mark". Since "quark" (meaning, for one thing, the cry of the gull) was clearly intended to rhyme with "Mark", as well as "bark" and other such words, I had to find an excuse to pronounce it as "kwork". But the book represents the dream of a publican named Humphrey Chimpden Earwicker. Words in the text are typically drawn from several sources at once, like the "portmanteau" words in "Through the Looking-Glass". From time to time, phrases occur in the book that are partially determined by calls for drinks at the bar. I argued, therefore, that perhaps one of the multiple sources of the cry "Three quarks for Muster Mark" might be "Three quarts for Mister Mark", in which case the pronunciation "kwork" would not be totally unjustified. In any case, the number three fitted perfectly the way quarks occur in nature."

                                                                                • Carolina Montealegre
                                                                                  Carolina Montealegre  5 days back

                                                                                  Someone thought about MOONCAKE from Final Space?

                                                                                  • Crisselle Heart
                                                                                    Crisselle Heart  5 days back

                                                                                    supernova to neutron star to quark matter to quark star to strange quark to strange matter to strangelets

                                                                                    • Rohan Shetty
                                                                                      Rohan Shetty  5 days back

                                                                                      Nope, I I still don't get it

                                                                                      • 53 ' er
                                                                                        53 ' er  5 days back

                                                                                        I thought matter means something different like "it doesnt matter" or is it used as well for Material

                                                                                        • 53 ' er
                                                                                          53 ' er  5 days back

                                                                                          Is this "strange thing" thing proven or do they just asume that

                                                                                          • Alexandros Huang
                                                                                            Alexandros Huang  5 days back

                                                                                            Wait a second wouldn’t the strange matter infect the neutron star

                                                                                            • vegetariansteak
                                                                                              vegetariansteak  5 days back

                                                                                              so basically subatomic zombies

                                                                                              • Gamma Del Ray
                                                                                                Gamma Del Ray  5 days back

                                                                                                Being infectiously converted into some strange nuclear matter by a small droplet of neutron star core sounds kind of romantic in my eyes.