Why Triassic Animals Were Just the Weirdest

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  • Published on: 05 June 2018
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    The Triassic was full of creatures that look a lot like other, more modern species, even though they’re not closely related at all. The reason for this has to do with how evolution works and with the timing of the Triassic itself: when life was trapped between two mass extinctions.

    Thanks to Ceri Thomas for the Drepanosaurus reconstruction. Check out more of Ceri's paleoart at http://alphynix.tumblr.com and http://nixillustration.com

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

    Finally, thanks to Emilio Rolandia, Matt Celeskey, and Studio 252mya for their excellent images as well.

    Produced in collaboration with PBS Digital Studios: http://youtube.com/pbsdigitalstudios

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    References:
    Original description of Triopticus with a description of repeated bodyplans and lifestyles of Triassic and later Mesozoic animals http://www.cell.com/current-biology/abstract/S0960-9822(16)30860-0
    Original description of Shringasaurus with discussion of allokotosaur evolution
    https://www.nature.com/articles/s41598-017-08658-8
    Original description of Avicranium with a discussion of drepanosaurids
    http://rsos.royalsocietypublishing.org/content/4/10/170499#sec-10
    An earlier phylogenetic analysis of drepanosaurs with discussion of their likely habits in life
    https://doi.org/10.1017/S1477201904001427
    A very thorough, but fairly technical discussion of adaptive radiations (including those triggered by extinctions) can be found in chapters 4, 5, and 10 of:
    Stanley, SM. 1979. Macroevolution: Pattern and Process. John Hopkins University Press.
    ISBN 0-8018-5735-X
  • Runtime : 10:10
  • dinosaurs dinos paleo paleontology scishow eons pbs pbs digital studios hank green john green complexly fossils natural history pangea drepanosaurs phytosaurs ichthyosaurs Avicranium Great Dying End Triassic Extinction adaptive radiation Permian rauisuchids aetosaurs Triassic Period stegosaurs convergent evolution chameleon finches evolution

COMMENTS: 40

  • Oel Dave
    Oel Dave   1 days ago

    How do they know their original colors? Or do they? Just curious

  • Rick Farwell
    Rick Farwell   1 days ago

    Listening to you explain evolution sounds Lamarkian.

  • 49erfaithful
    49erfaithful   2 days ago

    I wish all the animals that ever went extinct would come back to life so we could see/study them cuz it would be so awesome to see a spinosaurus and then a t-rex and then a megalodon and then a massive 10 foot bear and so much more

  • Ernie H.
    Ernie H.   1 weeks ago

    Ok, clawed tail..!That's really cool..!🤯

  • InHouseMaterial
    InHouseMaterial   1 weeks ago

    As "some guy" once said life finds a way. SOME GUY? that's DOCTOR some guy to you young lady

  • jajupa78
    jajupa78   2 weeks ago

    Please do a clip on why people say fur instead of for. It drives me crazy...

  • TruckerLee
    TruckerLee   2 weeks ago

    Imagine if our ape cousins evolved and we extinct ourselves and we end up on ABS digital studios 😂😂😂😂

  • Henry Labelle
    Henry Labelle   2 weeks ago

    So this means that in 50 million years, there could be a species of reptile that looks almost exactly like humans, oh, wait that already happened.

  • Strong Alpha Black Female Who Need No Man

    So is we humans disappear...our parallel evolution replacer will be.... other race of primates capable of walking in two legs and at the same time contamining the planet with their huge intelligence?

  • Gustavo Serrano
    Gustavo Serrano   2 weeks ago

    Why do people just buy this as fact. We literally are making all these CLAIMS like we have tons of evidence lol

  • Jeff Barber
    Jeff Barber   2 weeks ago

    Humanoid reptilians could have existed or still do!

  • Applewictorie
    Applewictorie   2 weeks ago

    I found the content very interesting and I wanted to watch the full video, but for me it is very important that what I hear is also nice to my ears. After a while I could not focus on the content only that voice. Please try to work on it. (I do not know if this message can reach the goal person) I would be able to listen better with a calming voice tone.

  • Lostmywings
    Lostmywings   2 weeks ago

    The way americans say niche is so jarring

  • Jason Sonic V
    Jason Sonic V   3 weeks ago

    Dinos and birds are different species. Nuff said.

  • Redbeardblondie
    Redbeardblondie   3 weeks ago

    She got the quote wrong. It’s “Life... uh, ... finds a way.”

  • RDR
    RDR   3 weeks ago

    Okay, so where are the other humanoid convergent evolutionary examples?

  • James Kim
    James Kim   4 weeks ago

    i can listen to explain stuff all day long

  • Nope
    Nope   4 weeks ago

    "as some some guy once said..." Love it :-)

  • Phillip Honeysett
    Phillip Honeysett   1 months ago

    Prob not enough green n weird or Strange or para time life all evolution dust n sea s tri or tre times change is evolve distinct or extinct or assic or classic museum print be any point n species land n seas

  • Ultimate MIF
    Ultimate MIF   1 months ago

    Cretaceous is the weirdest for meI mean seriously there's a giant goose with a sail, a creature with long trombone head, and some of them have crest and horn

  • The Bourgeois Punk
    The Bourgeois Punk   1 months ago

    Wow, I had never heard of adaptive radiation before. Different anatomies, same evolutionary pressures.

  • Pete Rmz
    Pete Rmz   1 months ago

    Her voice is so beautiful.

  • Metroz Eegle
    Metroz Eegle   1 months ago

    Damn, that makes me want the humans and other primates to go instinct just to see what animal would take their place in the "weak yet cunning smartass" ecological niche !My bets are on octopus !

  • Sachin Raghavan
    Sachin Raghavan   1 months ago

    This is a dawn period of life after a disastrous extinction.