Wetenschap en technologie

When Dinosaur Look-Alikes Ruled the Earth

Check out Prideland on PBS Voices: to.pbs.org/3hep3fo
There were a huge number of croc-like animals that flourished during the Triassic Period. Dinosaurs had just arrived on the scene but it was these animals that truly ruled the Earth, becoming both abundant and diverse.
Thank you to these paleoartists for allowing us to use their wonderful illustrations:
Ceri Thomas: alphynix.tumblr.com/
Fabrizio de Rossi: ArtofFabricious/
Franz Anthony: franzanth.com/
Julio Lacerda: JuliotheArtist
Nathan E. Rogers: 252mya.com/gallery/nathan-e-rogers
This video features this Paleogeographic Map: Scotese, C.R., 2019. Plate Tectonics, Paleogeography, and Ice Ages, NLcameras video: nlcameras.info/wiki/jpvbnnmol326uHY/video.
Produced in collaboration with PBS Digital Studios: nlcameras.info
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References: docs.google.com/document/d/1Vob3O2Z9799Ee-xjUnOKFoDC_kcThLbKn7cgOSdVGgw/edit?usp=sharing


  1. hector mena

    hector mena

    22 uur geleden

    elsegudo es mentira

  2. Johanna Zamora

    Johanna Zamora

    3 dagen geleden

    Awesome!!!! Thank you!!!

  3. JP


    4 dagen geleden

    Anyone know any good modern dinosaur documentaries like the ones we had back in the early 00's only with modern knowledge (feathered dinos).

  4. Eddie Jeffreys

    Eddie Jeffreys

    7 dagen geleden

    So this is truly a reptilian version of the bird like dinosaurs ?

  5. Julio Yánez

    Julio Yánez

    8 dagen geleden

    When was the last episode they didn't explain convergent evolution? XD

  6. kalico kat

    kalico kat

    9 dagen geleden

    I love nekos so much 💕🐈

  7. Mechyuda


    11 dagen geleden

    For many hundreds of millions of years, reptiles and arthropods have adapted to a wide variety of lifestyles or niches, but they seem to lack the ability to excel or dominate in any single type of a habitat. They are like the Jack of all trades, master of none.

  8. humanidrome


    14 dagen geleden

    Awesome episode!

  9. Tigerz


    14 dagen geleden

    I came for the sexy hosts, but stayed for the information!

  10. Natan Liber

    Natan Liber

    15 dagen geleden

    I'm sorry but it appears that the British isles were always a part of Europe throughout all the maps you're showing. As much as I know it has departed from Africa, please can you shed more light on the subject in a comment or even make a dream come true and do a video about it, I love this channel but this slight detail really bothers me. Thanks in advance!

  11. huldu


    18 dagen geleden

    If majority of life were to be removed from the planet I wonder how the next generation of living creatures and plant life would look like.

  12. Hanif Nurul

    Hanif Nurul

    18 dagen geleden

    200 million years later, dinosaur with brain rule the world. And their paleontologist found humans remains, 200 MYA.

  13. Eddy Hep

    Eddy Hep

    18 dagen geleden

    Use this fact for the ignorant and Unenlightened** . Within the conversation of evolution, I commonly hear people bring up this ignorant idea that crocodilians and sharks have not changed in hundreds of millions of years. Incorrect. I need not speak about crocodilians, but, with sharks the ray family directly evolved from them; Sting Rays, Manta Rays, Bat Rays, Eagle Rays, etc. Crocodilians and sharks have given rise to countless other lifeforms through evolution, but, a proto-form of both is so effective and successful that it lasts to this very day.

  14. Rahva Vaenlane

    Rahva Vaenlane

    24 dagen geleden

    Was gravity way weaker back then? Some of them look like they would definitely fall flat on their face..

  15. Daniel Marsala

    Daniel Marsala

    24 dagen geleden


  16. janet vang

    janet vang

    25 dagen geleden

    Nothing last forever

  17. The Nerd Beast

    The Nerd Beast

    26 dagen geleden

    I wonder if Rauisuchians had more ankle mobility to compensate for limited hip mobility caused by the protrusions of the hip.

  18. 1 M R

    1 M R

    26 dagen geleden

    Or maybe rauisuchians sex were determined by temperature, so one of the gender become much more common while the other becomer rarer, so the population shrunk, crashing the gene pool?

  19. Paula Bean

    Paula Bean

    28 dagen geleden

    PBS going woke?

  20. z ray

    z ray

    28 dagen geleden

    This was a great video. Explaining the actual differences in the hip structure was amazing.

  21. Lancifer


    Maand geleden

    Their little stubby hands thooough

  22. Emil Kirilov

    Emil Kirilov

    Maand geleden

    Great video!

  23. Upsidedown MOustache

    Upsidedown MOustache

    Maand geleden

    Ah some of us humans and our mental illnesses we truly are too smart for our own good.

  24. Nyla Noel

    Nyla Noel

    Maand geleden

    Rauisuchian looks like he's learning to roller skate

  25. Derek Bolz

    Derek Bolz

    Maand geleden

    Is it just me or does that thing at 2:49 look derpy as hell? No way is that guy walking around like that and not falling flat on its face

  26. Saif


    Maand geleden

    I don’t understand the fact that a reptile would be the beginning and the early creature in every animal / species in this world , birds . Mammals , ! Aren’t these animals different from reptiles ? How they transitioned from reptiles to a different animal that give birth instead of laying and doesn’t need the environment temperature like a reptile would unlike a mammal who’s warm blooded and didn’t rely on the environmental much . It’s a bit confusing

  27. Calebunga


    Maand geleden

    Fun fact: there was an animal that evolved opposable thumbs and climbed trees just like primates do today 200+ million years before us in the Permian. Imagine where they would’ve gone if the world didn’t get slam dunked into oblivion by lava.

  28. Heidi Schneir

    Heidi Schneir

    Maand geleden

    kay but why is this youtube channel so high quality though?

  29. Heat3YT2


    Maand geleden

    Back in my day, everything was a dinosaur. We didn’t have crocs that looked like dinos.

  30. Adalbert103222 hi

    Adalbert103222 hi

    Maand geleden

    "why they all bited the dust?" KILLER QUEEN

  31. Anton Boludo

    Anton Boludo

    Maand geleden

    👹 Might Satan be lurking at your chamber door? 👹

    • Prabath Hemachandra

      Prabath Hemachandra

      28 dagen geleden

      Satan is a fairytale

  32. Blake


    Maand geleden

    Ooo could you do a video on the silesaurids and other early dinosauriforms? They're so fascinating.

  33. Mixtape-Ninja


    Maand geleden


  34. Rick Mason

    Rick Mason

    Maand geleden

    To me convergent means "merging" while parallel means "side by side". So why is 2 species evolving similar traits to fill a particular niche convergent when the species don't unite?



    Maand geleden

    What about Batrachopus is it a rauisuchians???

  36. Vlad007


    Maand geleden

    2:48 WTF Terrible weight balance.

  37. Kanchan Pawar

    Kanchan Pawar

    Maand geleden

    Is batrachopus is rauichusian.....

  38. SHD004


    Maand geleden

    Who is Steve!?

  39. GaldirEonai


    Maand geleden

    Every time there's a major upheaval, it's the dominant species that suffers the most. Dinosaurs may have been saved simply because they had been successful than the Rauisuchians.

  40. Meow


    Maand geleden

    Is it just me or does this guy look like Vitalyzdtv 🤣

  41. Oleh Sem

    Oleh Sem

    Maand geleden

    Tell us about the level of carbon dioxide and oxygen on the planet, and their impact on life. Also, talk about fluctuations in carbon dioxide levels and future threats.

  42. Albert Weedstein The Thug Genius

    Albert Weedstein The Thug Genius

    Maand geleden

    But is that particular shape really the only solution to survival in the early triassic? Or is there mimicry involved likesome butterflies with those spots?

  43. Renaissance Man

    Renaissance Man

    Maand geleden

    As a kid I refused to accept dimetrodons, mosasaurs and pterosaurs etc were not dinosaurs

  44. JakulaithWolff


    Maand geleden

    Did nobody wonder how these animals were able to lay down and sleep if they looked like that?

  45. Adena Properties

    Adena Properties

    Maand geleden

    I like the Scientific Discussions presented in PBS Eons. Talking a plug for 'PrideLand' ? Not at all 'scientific' and kinda' stupid, really. So doesn't belong here at all. Reality Check, boyos.

  46. Alexander Batyr

    Alexander Batyr

    Maand geleden

    6:00 ¯\_(ツ)_/¯

  47. Astral Ghost

    Astral Ghost

    Maand geleden

    This channel provides my history-loving self with a trove of information of the world before humans! I greatly encourage this channel to continue creating such wonderful content!

  48. Astral Ghost

    Astral Ghost

    Maand geleden

    I do enjoy learning about all types of history! This channel has given me a trove of knowledge about the world before human history and I greatly appreciate it! Keep up the stunning work!

  49. AliEvaMari


    Maand geleden

    Yes, definitely a change in this guy's physique over the last year.

  50. Gamebook


    Maand geleden

    The survival of the dinosaurs over the rausuchians may not be because of any superiority at all in their physiology. Instead the rausuchians very success may have been their downfall. As the dominant animals they occupied most of the specialist and large-bodied animal ecological niches, while the dinosaurs were confined to being small, generalist scuttlers hiding in the undergrowth around their mighty feet. But specialization and large-size are recipes for disaster when catastrophe strikes, it is the small generalists who survive. With their big predecessors gone the small species of animals flourished and diversified, gradually re-evolving many of the traits of the larger species. Then another catastrophe struck and the now-large dinosaurs went the way of the rausuchians, with the Earth inherited by smaller animals like birds and mammals. What goes around comes around. Meanwhile the crocodiles in their swampy domains were insulated it seems from all these disasters and just carried on with their archaic ways.

  51. Andrew Cook

    Andrew Cook

    Maand geleden

    That Rauisuchian is living its best life.

  52. Jose Mendez

    Jose Mendez

    Maand geleden

    Wait wait wait.... of topic but..... their was a crocodile that looked like 2001 Spinosaurs?!?!

  53. Oh My Lord Taecyeon

    Oh My Lord Taecyeon

    Maand geleden

    So if they all went extinct, is the modern crocodile not a descendant of them?

    • Droop Smoop

      Droop Smoop

      Maand geleden

      Nah Rauisuchians were only a sister group to the group that would've evolved to be modern crocs

  54. Kermo Saarse

    Kermo Saarse

    Maand geleden

    Convergent evolution is amazing. There are mammal-birds (bats), mammal-fish (whales), horse-gorillas (calicotheres), reptile-dolphins (ichthyosaurs), dinosaur-bees (hummingbirds), crocodile-dinosaurs (effigia) and salamander-crocodiles (prionosuchus)!

  55. wrybreadspread


    Maand geleden

    Bipedal crocodilians. Go figure.

  56. Peter Peterson

    Peter Peterson

    Maand geleden

    Well this might play into the hot vs cold blooded argument a bit. It may also play into the protofeathers argument on how early did dino's become fluffy? I could expect that the breakup of the super continent caused a small ice age or at least the temp to drop enough that large cold blooded animals like crocs would mostly die out leaving plenty of niches open for fluffy little dinos and small mammals to survive. The remaining surviving croc species must have been the ones decedent from those closest to the equator at the time.

  57. Although Media Productions

    Although Media Productions

    Maand geleden

    (slang, Canada, US, countable and uncountable) Silly talk, a foolish belief, a poor excuse, nonsense. That's a bunch of crock. The story is a crock.

  58. Although Media Productions

    Although Media Productions

    Maand geleden

    "....if it looks like a dinosaur and walks like a dinosaur... it might just be a crock."

  59. Stanko Kvesić

    Stanko Kvesić

    Maand geleden

    Were not sure... Actualy one of the best answers

  60. Just wanna watch YouTube geez!

    Just wanna watch YouTube geez!

    Maand geleden

    “All good things must come to an end” Me sitting here: .... so uh when is it gonna be our turn? 😆. People always talk about the WORLD ending.. but I think we’d just cause our own extinction before the entire world becomes lifeless. The big advantage we have is our minds though. If our bodies begin to face an evolutionary challenge like idk intense global warming.. we can create technology to handle it instead of relying on a bodily adaptation.