The Age of Reptiles in Three Acts

  • Published on: 02 May 2018
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    Reptiles emerged from the Paleozoic as humble creatures, but in time, they grew to become some of the largest forms of life ever to stomp, swim, and soar across the planet. This Age of Reptiles was a spectacular prehistoric epic, and it all took place in a single era: the Mesozoic.

    This episode (as well as most episodes of Eons) features beautiful paleoart from Studio 252mya. We dare you to try to not spend hours looking at their work:

    And thanks as always to Nobumichi Tamura for allowing us to use his wonderful paleoart:

    Produced in collaboration with PBS Digital Studios:

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  • Runtime : 11:7
  • dinosaurs dinos paleo paleontology scishow eons pbs pbs digital studios hank green john green complexly fossils natural history Mesozoic Paleozoic The Great Dying Pangea Triassic Period Jurassic Period Cretaceous Period phytosaurs archosaurs pterosaurs Ichthyosaurs titanosaurs Ornithischians K-Pg Extinction tyrannosaurs tyrannosaurids coleurosaurs reptiles era


  • Mimi de Seda
    Mimi de Seda   3 hours ago

    I actually expected (and would not have minded) a longer video.

  • Venator-Class Star Destroyer -

    I wonder how the crocodilians survived. Were they just very lucky? They are quite large and large animals had a hard time to survive during the extinction.

  • Edward Cabaniss
    Edward Cabaniss   2 days ago

    Calling dinosaurs reptiles is kind of sloppy, isn't it? Starting with Drs John Ostrum and Robert Bakker back in the 1960s and 1970s the view that dinosaurs were cold-blooded reptiles was dropping by the wayside. Nowadays, most dinosaurs, especially the ornithischains, are considered to be warm-blooded or at least, non-cold blooded. While no one is sure when dinosaurs developed endothermic metabolisms, by the middle of the Jurrasic Period, warm-blooded dinosaurs were the norm.

  • Jlog D
    Jlog D   2 days ago

    You didn’t mention in the late Cretaceous how it got so cold but it’s short so I don’t blame you

  • TheIronAntelope
    TheIronAntelope   3 days ago

    Imagine what the dinosaurs must have thought when that asteroid hit. There must've been countless generations of creatures living through an actual apocalypse and not knowing any the world to be any different.

  • andy the gardener
    andy the gardener   6 days ago

    stop promoting the outdated idea that dinosaurs were 'reptiles'. they were warm blooded, sophisticated and no more reptilian than mammals, and in fact hugely more advanced and dominant over their fury rivals, mammals having evolved long before and from more primative ancestors. there isnt even a group of animals in clasification that are called 'reptiles' anyway.

  • Nicolas
    Nicolas   2 weeks ago

    200 million years...., we are nothing compared to these creatures, but if they didn't go, we wouldn't be here 😣

    DAYBROK3   2 weeks ago

    Maybe Dino’s were extremely allergic to flowers? 🤣🤣🤣

  • Paul Babcock
    Paul Babcock   3 weeks ago

    So if birds are dinosaurs, are amphibians, reptiles, and mammals still types of fish? And if no, what is the difference?

  • Central Scrutinizer
    Central Scrutinizer   3 weeks ago

    And today, when the next asteroid is heading to strike the Earth, we'll alter its course to prevent the next mass extinction, which will lead to mass extinctions as humans over populate and over dominate the Earth and 10 million years in the future, humans will be eating humans on a daily basis. When the bees and plankton go, you're next.

  • John Wang
    John Wang   3 weeks ago

    1:33 lol that little dude looks kinda like a seal

  • Jim Inverness
    Jim Inverness   4 weeks ago

    8:58 Rocks dated not to 66 million years ago. Dated to 65.5 million years ago!

  • Peter Watanabe
    Peter Watanabe   4 weeks ago

    I want to learn more about Giant salamanders and how they're so big

  • Imaginose314159
    Imaginose314159   1 months ago

    I wonder if Trex used its front arms to eat eggs when they were small and then stopped when they grew larger,

  • Mad Machanicest
    Mad Machanicest   1 months ago

    I would vary much like to laern about the oldest animals on earth today things that are older then kamberin . like what modern animals have the oldest none fuse relatives like shade dollars and jellyfish.

  • David Coleman
    David Coleman   1 months ago

    So how do we tie this in with genesis? what were we doing this whole time and don't tell me I was an ape.

  • Kurisupi Kurimu
    Kurisupi Kurimu   1 months ago

    Act 1- The sound of your wordsAct 2- The meaning of your wordsAct 3- The weight of your words

  • Charly Hitter
    Charly Hitter   1 months ago

    Do a video about the oldest fossil ever found

  • Richard Deese
    Richard Deese   1 months ago

    ...And then flowers appeared on the scene, which the dinosaurs roared at, and trampled all over... ;) Rikki Tikki.

  • Adam Bram
    Adam Bram   1 months ago

    I'm sorry, but given how different and unique they were I don't feel referring to dinosaurs as "reptiles" is accurate.

  • Teykel Meeka
    Teykel Meeka   1 months ago

    Wonder if others think about how would humans survive when hit with another heavy vulcanic activity bout. Dunno why but my brain always goes there.

  • Sydney
    Sydney   1 months ago

    PBS eons said feathered dinosaur rights

  • Finn Packard
    Finn Packard   1 months ago

    I would like to know more about dogs and how there existence allowed man to live and flourish. Is it true that without dogs mankind might have become extinct?Also, why don't wolves bark like dogs?

  • suicidal jew
    suicidal jew   1 months ago

    no one really knows what color dinosaurs were. they could’ve been pink with polka dots

  • Kayla Robertson
    Kayla Robertson   1 months ago

    I only found this channel today, and have already watched half your videos. They are just so well done and incredibly informative. I really appreciate all the effort that you all have put into making this channel fantastic.

  • Mr. Boomguy
    Mr. Boomguy   1 months ago

    When you think about, the mammals story mirrors the reptiles after both extinction events. We both started as small and nible, and when the big players disapeard, we diversified and dominated.