Did Raptorex Really Exist?

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  • 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: superiorjanitorial.pro/user/pbsdigitalstudios

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    Katie Fichtner, Aldo Espinosa Zúñiga, Anthony Callaghan, Marcus Lejon, Anel Salas, Robert Arévalo, Robert Hill, Kelby Reid, Todd Dittman, Betsy Radley, Svetlana Pylaeva, Colin Sylvester, Philip Slingerland, John Vanek, Jose Garcia, Noah offitzer, Eric Vonk, Tony Wamsley, Henrik Peteri, Jonathan Wright, Wilco Verweij, Jon Monteiro, James Bording, Brad Nicholls, Miles Chaston, Michael McClellan, Elysha Nygård, Jeff Graham, Maria Humphrey, Nathan Paskett, Connor Jensen, Sapjes, Daisuke Goto, Hubert Rady, Yuntao Zhou, Gregory Kintz, Tyson Cleary, Chandler Bass, Maly Lor, Joao Ascensao, Tsee Lee, Sarah Fritts, Ruben Winter, Ron Harvey Jr, Joshua Mitchell, Johnny Li, Jacob Gerke, Brandon Burke, Alex Yan

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    References:
    radiocarbon.com/about-carbon-dating.htm
    nature.com/articles/srep20252
    researchgate.net/publication/288175395_Spore-pollen_flora_as_the_indicator_of_paleoclimate_condition_in_the_Yixian_Formation_western_Liaoning_Province
    onlinelibrary.wiley.com/doi/abs/10.1111/j.1502-3931.2011.00284.x
    link.springer.com/article/10.1360/02tb9031
    sciencedirect.com/science/article/pii/S0195667105000662
    journals.plos.org/plosone/article?id=10.1371/journal.pone.0021376
    science.sciencemag.org/content/326/5951/418
    jstor.org/stable/3515101
  • Science and Technology Science and Technology

Comments • 828

  • 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

      Wtf

    • 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  2 months back

      Nerd

    • 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.

  • Justin Copenace
    Justin Copenace  3 days back

    How do people know its just guessing

    • denunci mesmo
      denunci mesmo  2 weeks back

      hard work! :)

      • just an animator Ramos
        just an animator Ramos  2 weeks back

        Yes they do exist

        • We are all the same
          We are all the same  3 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  2 months back

                    Once again PBS, love it!!

                    • Shockwave 2
                      Shockwave 2  2 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  3 months back

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

                                            • Lorenzo Potrich
                                              Lorenzo Potrich  3 months back

                                              What a big old mess!

                                              • Joe Bolton
                                                Joe Bolton  3 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  4 months back

                                                              Ity bity arms! Ahhh :)

                                                              • ironspeedster 01
                                                                ironspeedster 01  4 months back

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

                                                                • steve zora
                                                                  steve zora  4 months back

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

                                                                  • Gio Marron
                                                                    Gio Marron  4 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  5 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  5 months back

                                                                                Juvi rex

                                                                                • dannore
                                                                                  dannore  5 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  5 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

                                                                                        • Perry Dowd
                                                                                          Perry Dowd  6 months back

                                                                                          The mysterious Raptor X is Steve Raptor's older brother, who ran away from home many years ago.

                                                                                          • Peter Timowreef
                                                                                            Peter Timowreef  6 months back

                                                                                            A double armoured herring hahahaha


                                                                                            Dual wielding bazooka bumble bee

                                                                                            • hans bakti
                                                                                              hans bakti  6 months back

                                                                                              do about weird looking dinosaurs like Mononykus ! I'm still wandering what it's one-clawed front legs function..