Did Raptorex Really Exist?

  • Published: 19 September 2018
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    Paleontologists have been studying and drawing totally different conclusions about the fossil LH PV18 for almost a decade. Is it just one of many specimens of a theropod called Tarbosaurus bataar or is it an entirely different theropod named Raptorex kriegsteini? In order to answer this question, you have to understand the many ways in which we can--and can’t--determine the age of a fossil.

    Thanks to Gregory S. Paul for allowing us to use his illustrations in this video. Check out his website here: gspauldino.com/

    And thanks as always to Nobu Tamura for allowing us to use his wonderful paleoart: spinops.blogspot.com/

    Produced in collaboration with PBS Digital Studios: cepnet.mobi/user/pbsdigitalstudios

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  • Science and Technology Science and Technology

Comments • 832

  • Pfhorrest
    Pfhorrest  1 years back

    Your explanation and illustration of carbon-14 decay is misleading. It's not like one of its electrons spontaneously combusts and becomes an electron and an electron antineutrino. One of its *neutrons* "spontaneously combusts" (because of rare interactions between its constituent quarks and ambient W bosons, which flip an up quark to a down quark [edit: reverse that]) and emits the electron and electron antineutrino. The emission of the negatively charged electron turns the neutral neutron into a positively charged proton, and the mess that becomes of the particles' quantum numbers when that happens generates the electron antineutrino to balance it all out.

    It's the change of the neutron to proton that makes it into a different element (carbon to nitrogen), and none of the already-orbiting electrons have to be lost in this process; actually, the nitrogen-14 will want to grab another electron from the environment (like the one it just emitted) for its electron shells, now that it has one more positive charge in its nucleus than it did before.

    • Rein Man
      Rein Man  2 months back


    • Hatred At Heart
      Hatred At Heart  2 months back

      i'm not even gonna try to understand this

    • Debesh Bhattacharjee
      Debesh Bhattacharjee  2 months back

      Thats why, C 14 emits Beta ray. That high energy electron comes out of the nucleus as Beta ray.

    • Matthew Nancarrow
      Matthew Nancarrow  3 months back


    • Alexander Canella
      Alexander Canella  3 months back

      @Darth Gorthaur PBS pinned it as top comment so people would see their mistake. Awesome on him and on them.

  • rob32tn
    rob32tn  5 days back

    I`m dying to know more about how HERRERSAURUS ., how it seemed more
    reptilian then its successor`s in the Jurassic and so on ? PLEASE? Just
    HERRERSAURUS period would be super nice and way awesome.

    • PurpleRhymesWithOrange

      Since most paleontologist are geeks it's not surprising they they don't know what an actual date looks like.

      • MAGAman20201107
        MAGAman20201107  7 days back

        Without provenance it is moot. This argument will continue until a new and more accurate technique is developed. Without the location the argument will never end.

        • Justin Copenace
          Justin Copenace  2 weeks back

          How do people know its just guessing

          • denunci mesmo
            denunci mesmo  3 weeks back

            hard work! :)

            • just an animator Ramos
              just an animator Ramos  4 weeks back

              Yes they do exist

              • We are all the same
                We are all the same  4 weeks back

                lead is not a radioactive element, neither is Aragon. those two are radioactively stable for practical applications, rather they are the end products of radioactive processes. for example, lead is the end product of Uranium 238 decay. dating is done by comparing Uranium isotopes relative to lead.

                • Bhaskar Yadav
                  Bhaskar Yadav  2 months back

                  I got the name of my new speed metal band "Raptorex"... Thanks

                  • Pepins Spot
                    Pepins Spot  2 months back

                    This is one of the best stories they have reported on. I found myself laughing when the fish vertebrae was said to be from the Doubled Armored Hearing and the age range was so long. It was like, "Oh man you made it worst!"

                    • Drake Kay
                      Drake Kay  2 months back

                      Those little arms are specially adapted to be tooth picks! haa haa

                      • Guy H.
                        Guy H.  2 months back

                        Always great videos! Way to go Nat Geo!

                        • rjhuntervanderkooi
                          rjhuntervanderkooi  3 months back

                          Once again PBS, love it!!

                          • Shockwave 2
                            Shockwave 2  3 months back

                            So...this is definitively a fossil, and nothing else is known for certain. Gotcha.

                            • Demented Creations
                              Demented Creations  3 months back

                              Some modern animals are isolated to very specific regions or areas. Like how the Komodo Dragon species is isolated on a single island. What if raptorex was isolated to one very specific ancient mountain range or something like that? That could be another factor as to why no one else has found another fossil of it yet.

                              • plaguelock
                                plaguelock  3 months back

                                You can't carbon date a fossil anyhow. You can't carbon date rock.

                                • Mr.Apple
                                  Mr.Apple  3 months back

                                  we can all agree on one thing, whatever it is!

                                  It's dead

                                  • MrJeffcoley1
                                    MrJeffcoley1  3 months back

                                    My opinion, Fowler‘s theory that it is a juvenile is a much simpler theory

                                    • 74546
                                      74546  3 months back

                                      just ask the dinosaur when he died its not that hard lol

                                      • VWftw82
                                        VWftw82  3 months back

                                        Tl;dw version: at this point, it's just simpler just to call it what scientists refer to as a nomen dubium, Latin for "doubtful/dubious name," meaning it's too difficult to compare to known genera and species.

                                        • Lee Maples
                                          Lee Maples  3 months back

                                          One day they will use all the sophisticated dating techniques to get some accurate datesof megalithic structures that are the big mystery of humanity.

                                          • Barbara Vick
                                            Barbara Vick  3 months back

                                            Had to stop seeing tattoos instead of dinosaurs.

                                            • Nicodemus
                                              Nicodemus  3 months back

                                              This video makes me wonder how many discoveries are robbed from the public & from science that are thanks to private collectors. It puts a bad taste in my mouth.

                                              • Rebecca luis
                                                Rebecca luis  3 months back

                                                Raptorex sounds the guy discoverd it let his kid name it

                                                • Griffin Piconi
                                                  Griffin Piconi  4 months back

                                                  Couldn’t they compare its DNA to the other dinosaurs DNA

                                                  • Lorenzo Potrich
                                                    Lorenzo Potrich  4 months back

                                                    What a big old mess!

                                                    • Joe Bolton
                                                      Joe Bolton  4 months back

                                                      0:27 swear that’s highlands from ragnarok in ark 😂

                                                      • RumbleRjHumble
                                                        RumbleRjHumble  4 months back

                                                        Is this a stupid question?

                                                        • Sibs X3
                                                          Sibs X3  4 months back

                                                          Can u do one about the dilophosaurus pls

                                                          • Greg Williams
                                                            Greg Williams  4 months back

                                                            Interesting video and beautiful narrator, I personally think that if the scientific community ever finds anther raptorex dinosaur it will be dated to the age of tarbosaurus baatar and raptorex will be proven to be a juvenile tarbosaurus.

                                                            • Kiss two Gays
                                                              Kiss two Gays  4 months back

                                                              Maybe when you die these mysteries of the world will be revealed to you

                                                              • Tarbtano
                                                                Tarbtano  4 months back

                                                                Given how close it is to Tyrannosaurus I guess it's only fitting Tarbosaurus would get saddled with its very own Nanotyrannus debacle.

                                                                • MVR The red baron
                                                                  MVR The red baron  4 months back

                                                                  If the Dinos kept a diary, we would not be having this dating problem.Just peek into the entries, and boom.

                                                                  • teety woo
                                                                    teety woo  5 months back

                                                                    Ity bity arms! Ahhh :)

                                                                    • ironspeedster 01
                                                                      ironspeedster 01  5 months back

                                                                      The history off Trexs descovery and how our veiw of the animal has changed over the years

                                                                      • steve zora
                                                                        steve zora  5 months back

                                                                        She's the best! So nice, clear and smily, I could listen her explanation about dinos for hours!

                                                                        • Gio Marron
                                                                          Gio Marron  5 months back

                                                                          Best way to date a dinosaur is to buy it flowers, compliment its eyes and take it for a nice, romantic dinner

                                                                          • W1ll P0w3R
                                                                            W1ll P0w3R  5 months back

                                                                            Or Fowler and sereno can work together to determine what the fossil is instead of being butth0les trying to have all the credit individually

                                                                            • Mick C
                                                                              Mick C  5 months back

                                                                              Well one thing we do know, it never run around on grassy river banks either 130 or 70 million years ago. No non Avian Dinosaur ever saw grass.

                                                                              • Rob Card
                                                                                Rob Card  5 months back

                                                                                click bait, not the host i was hoping for.
                                                                                will i learn anything?
                                                                                probably not because im moving on.

                                                                                • Christopher Huebner
                                                                                  Christopher Huebner  5 months back

                                                                                  It’s really weird to watch this video immediately after watching the video on why TRex had tiny arms. This video claims the existence of Raptorex is unknown. In the TRex video, Raptorex is given the older date and is given as proof of tiny arms evolving early on. No mention of any debate at all in that video.

                                                                                  • Canis Poetam
                                                                                    Canis Poetam  6 months back

                                                                                    so here's an idea . . .

                                                                                    how about an analysis of whatever geologic material
                                                                                    was present with the fossil, and use that to help select
                                                                                    three target areas where it is thought the fossil may have
                                                                                    originally be found - In China by a lake and by a river,
                                                                                    and one site somewhere in Mongolia.

                                                                                    Then get funding and permission to send in three teams
                                                                                    on the theory that if the conditions were right for
                                                                                    the preservation of one fossil, there may be others.
                                                                                    Then dig dig dig.


                                                                                    • Big Daddy
                                                                                      Big Daddy  6 months back

                                                                                      Juvi rex

                                                                                      • dannore
                                                                                        dannore  6 months back

                                                                                        I would be surprised if those scientists don't have a bet going on who turns out to be right when a new fossil shows up

                                                                                        • johnny1893
                                                                                          johnny1893  6 months back

                                                                                          Because... this ''dinosaur''is made of multiple specimen... Like a lot of scam...
                                                                                          People never learn...

                                                                                          • Akatosh Dragon God of Time

                                                                                            I didnt realise digging up bones and imprints from dirt is illegal

                                                                                            • NUTCASE71733
                                                                                              NUTCASE71733  5 months back

                                                                                              it is if you aren't using a permit, or an accredited scientist....

                                                                                          • Miguel Cruz mora
                                                                                            Miguel Cruz mora  6 months back

                                                                                            T Rex with feathers look so lovely but still deadly!

                                                                                            • Authur Morgan
                                                                                              Authur Morgan  6 months back

                                                                                              Nice tattoos