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 • 15 119

  • 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.

    • SpudSupreme
      SpudSupreme  4 days back

      Somebody needs to fix the captions. They've seen better days.

    • Jesse Chavez
      Jesse Chavez  2 weeks back

      False not last*

    • Jesse Chavez
      Jesse Chavez  2 weeks back

      What if the last vaccum collapses and hits strange matter?

    • Höllenstein
      Höllenstein  2 weeks back

      Now im scared again


  • Ink Bass
    Ink Bass  11 hours back

    The more you know, the less you know.

    • vjm3
      vjm3  12 hours back

      I want a super villain that can control Strange Matter. It'll be like the Black Lantern Corps.

      • Ernest Jay
        Ernest Jay  13 hours back

        instead of strange matter, imagine if the core of Neutron Star is filled by Anti-Matter.

        • Talia Gunderson
          Talia Gunderson  14 hours back

          *Glowing green thing strikes planet

          *Goes on laptop like nothing happens

          • Thomas SH
            Thomas SH  17 hours back

            Your videos are hauntingly beautiful

            • Simply-Abstract
              Simply-Abstract  18 hours back

              As if there weren't enough things to already worry about that could kill us. (>______>)

              • Ash Ketchum
                Ash Ketchum  22 hours back

                Does a neutron emit light?

              • JustAnotherPlant
                JustAnotherPlant  24 hours back


                • Gone, reduced to atoms

                  Kurzgesagt Bizarre adventure:Space crusaders

                  • Hannibal
                    Hannibal  1 days back

                    So we can use it as an really dangerous source of space efficient gravity.

                    • Aden FTW
                      Aden FTW  1 days back

                      Welp that's it, strange matter is officially more terrifying than rogue planets.

                      • NOO37YLER
                        NOO37YLER  2 days back

                        If quarks made the universe.. then what happened to god? I have so many questions...

                        • regot
                          regot  2 days back

                          shouldn't neutron stars turn into hydrogen-burning stars from the decay of neutrons unbound to anything, therefore creating hydrogen, because the neutrons aren't bound to anything it has no atom to create without any protons and the neutrons that don't decay that fast fuse to make hydrogen 2 until slowly they fuse together more and more. I don't know because thinking about it the hydrogen may instantly create another neutron, but that would violate the laws of thermodynamics because it would create a neutrino which does have mass every time it decays, or maybe it just loses some charge; but a quark can not lose it's charge unless a proton or positron is shot out and for that you need at least 1 solid charge, not 1/3 or 2/3, so it then creates a paradox of infinite mass until the protons even decay, or it cools down to 0 degrees kelvin. I don't know, I may be missing something and protons aren't proven to decay quite yet but I see it as quite plausible.

                          • Ankleshwer Singh Tanwar

                            WHY WOULD SOMEONE DISLIKE?!, time will tell.

                            • regot
                              regot  2 days back

                              I thought it was strange quarks make up the dark matter of the universe and since they are weekly interactive neutron stars can pull them into the core, and the star gets powered for a couple more cosmological decades from the annihilation of the strange matter

                              • Ryan Hilliar
                                Ryan Hilliar  2 days back

                                Bruh, this halo 12 flood reboot looking fire tbh

                                • Your Neighbor
                                  Your Neighbor  2 days back

                                  2:32 Quarks are cute.
                                  This vid, scaring you with strange stuff thru cute animations. XD

                                  Not that it's that scary though, im probably long dead by the time some strangelet conquers earth.

                                  • Some Guy
                                    Some Guy  2 days back

                                    What is it made off?
                                    *Quarks and stuff*

                                    • Ducky Dogger
                                      Ducky Dogger  2 days back


                                      Bird Scream From In Coming Doom, Then Go On Computer....

                                      Awww... The Bird Forgot To Make Wish, Plus He Was Awoken... Poor Guy

                                      • Franky Franke
                                        Franky Franke  2 days back

                                        This is the only video that y'all have made I consider garbage... Did y'all run out of material?

                                        • eydan
                                          eydan  2 days back


                                          • Wyatt Nooodles
                                            Wyatt Nooodles  2 days back


                                            • Justin Akkerman
                                              Justin Akkerman  3 days back

                                              why are the captions all weird


                                              • Plasma Matter
                                                Plasma Matter  3 days back

                                                Hahaha this is super hilarious I can’t stop laughing.

                                                • CL Melonshark
                                                  CL Melonshark  3 days back

                                                  Doctor: you have a presence of strange matter inside your body
                                                  Me: *touch*
                                                  Doctor: oh no
                                                  Doctor Strange: oh no

                                                  • Drakaina Tohru
                                                    Drakaina Tohru  3 days back

                                                    You are wrong in one department it's Karen asking for the manager

                                                    • Marko Studio
                                                      Marko Studio  3 days back


                                                      • Givzz Productions
                                                        Givzz Productions  3 days back

                                                        Christians are shook by the intro

                                                        • Blue Fire
                                                          Blue Fire  3 days back

                                                          There Toxic

                                                          • Theodor Odén
                                                            Theodor Odén  3 days back


                                                            • Mr.Potato52
                                                              Mr.Potato52  3 days back

                                                              *The Existential Crisis Playlist*

                                                              • Ryan Baker
                                                                Ryan Baker  3 days back

                                                                These videos hurt my brain

                                                                • It's_yab0i_Luis
                                                                  It's_yab0i_Luis  4 days back

                                                                  Guess we'll die :v

                                                                  • NSA
                                                                    NSA  4 days back

                                                                    Resistance is futile.

                                                                    • wolfo slavy boi
                                                                      wolfo slavy boi  4 days back

                                                                      People just make cringe and not even funny comments and sassy stuff

                                                                      • Shea Corduroy
                                                                        Shea Corduroy  4 days back

                                                                        Somehow there isn’t a stranger things joke in this comment section.

                                                                        • Alfonso Cuevas
                                                                          Alfonso Cuevas  2 days back

                                                                          Wasn't, you just did.

                                                                          alles ist miteinander verbunden - Dark

                                                                      • nathan
                                                                        nathan  4 days back

                                                                        Down vote for getting political.

                                                                        • nathan
                                                                          nathan  4 days back

                                                                          @ilmu011 The part, about 3/4ths of the way to the end, where there are two birds surprised by the sudden cold weather, and one of the birds has a Trump haircut. I don't need either a climate agenda or Trump agenda pushed into the science videos I watch.

                                                                        • ilmu011
                                                                          ilmu011  4 days back

                                                                          Which part of this video do you think is political lol

                                                                      • Kumar Makhija
                                                                        Kumar Makhija  4 days back

                                                                        People in comment section: Try to make memes on video

                                                                        • TheRealTalVerd
                                                                          TheRealTalVerd  4 days back

                                                                          It's like a gray goo scenario, but on a subatomic level and for the entire universe

                                                                          • Jojo Divas
                                                                            Jojo Divas  4 days back

                                                                            Kurzesagt: “So while you’re waiting for the universe to get destroyed”

                                                                            Me: Excuse me what the fak

                                                                            • Pixel Tree
                                                                              Pixel Tree  4 days back

                                                                              This is actually so interesting

                                                                              • LaBass666
                                                                                LaBass666  5 days back

                                                                                Ash's monologue in the 1979 alien film perfectly fits what stranglets do!

                                                                                • Joe Sturgeon
                                                                                  Joe Sturgeon  5 days back

                                                                                  After watching this again, I think it's possible that the sun in Frostpunk, might be a strange star.

                                                                                  • SwankyBasher 5
                                                                                    SwankyBasher 5  5 days back

                                                                                    You vids are so entertaining

                                                                                    • Georgios Rinakakis
                                                                                      Georgios Rinakakis  5 days back

                                                                                      one word for this video : hypothesis

                                                                                      • Jaek
                                                                                        Jaek  5 days back

                                                                                        The properties that you say that strange matter most likely has match the theoretical properties of a singularity. Infinite density? Indestructibility?

                                                                                        Also, we know due to the laws of physics that if there was strange matter at the core of neutron stars, then the whole star would instantly be converted to strange matter, so we can already conclude that strange matter is not at the core of a neutron star.

                                                                                        We also know that neutron stars are not black holes due to the electromagnetic forces that cause molecules to repel each other, which further supports the conclusion that strange matter is not at the core of neutron stars.

                                                                                        Furthermore, if my theory that singularities are the only place in the universe where strange matter exists and is stable is taken into account, it would explain the lack of planets collapsing due to your theorised "strangelets".

                                                                                        So, for those looking for a reason not to fear strangelets, or those who didn't read the full comment :

                                                                                        Stranglets most likely don't exist, as the only place where strange matter can exist stably is under the infinite gravitational pressure of a black hole.

                                                                                        • Lünkel
                                                                                          Lünkel  5 days back

                                                                                          1. No, strange matter does not have infinity density. It's not a singularity
                                                                                          2. A neutron star is not stabilized by electromagnetic forces between molecules. There aren't even any molecules there and the main thing keeping it from collapse is the pauli exclusion principle.

                                                                                      • S
                                                                                        S  5 days back

                                                                                        People always talk about humans doing something to cause our extinction without knowing. Messing with the stars might just be that. Another Big Bang is the bomb we didn’t expect.