When Crocs Thrived in the Seas

29 apr. 2021
347 536 Weergaven

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While dinosaurs were dominating the land, the metriorhynchids were thriving in the seas. But taking that plunge wasn’t easy because it takes a very special set of traits to fully dedicate yourself to life at sea.
Special thanks to these wonderful paleoartists for allowing us to use their incredible work throughout this episode:
Ceri Thomas (including the illustrated the metriorhynchid in the thumbnail): nixillustration.com/
Dmitry Bogdanov: www.deviantart.com/dibgd
Nobu Tamura: spinops.blogspot.com/
Julio Lacerda: twitter.com/JulioTheArtist
Franz Anthony: franzanth.com
This video features this Paleogeographic Map: Scotese, C.R., 2019. Plate Tectonics, Paleogeography, and Ice Ages, NLworld video: nlworld.info/key/video/tp2noKbUaISFjHg​.
Produced in collaboration with PBS Digital Studios: nlworld.info
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References: docs.google.com/document/d/1KC_Rf-zEr0I7DgTdbtvP95cULaxIAbFEZNdXSQJLKWo/edit?usp=sharing

Reacties
  • What a croc!

    MC HMC H2 uur geleden
  • Why tf did the paleoartists draw its limbs as gross featureless nubs with apparently no value for locomotion instead of as flippers or webbed claws? Like I get that there had to be some midway point between croc feet and mosasaur-style flippers but wouldn’t every step along the way have to be helpful for survival? I don’t understand how cylindrical sausage legs could possibly have gotten the job done and what evolutionary pressure there could be to lose the dexterity of croc feet.

    payne stiegmanpayne stiegman14 uur geleden
  • embrace crab walks, and reject homo-sapien bipedalism.

    Davey CrocketDavey Crocket20 uur geleden
  • This is eons. 🌳🦖. 🌲 🌲. EONS. 🦕

    Krystle RobertsonKrystle RobertsonDag geleden
  • You know what I want to learn about? How teeth evolved:)

    Krystle RobertsonKrystle RobertsonDag geleden
  • You guys are awesome. How about a video going over some of the major OR minor inaccuracies in Jurassic Park? Or going over any science that was "true" in the 90s when it was made and what we have been able to prove or disprove since??

    Drew GDrew GDag geleden
  • OMG puns overload! Thank yoy Blake, our pun overlord!

    NoukzNoukzDag geleden
  • Transitional fossils are like electrons in a huge empty space in the atom. Merge creation with evolution and you will fix this.

    René BijlooRené Bijloo2 dagen geleden
  • 7:20 Teacher: What is 420 - 69? Him: 351 Teacher: Then why did you write dinosuars?

    Ashim AhmedAshim Ahmed2 dagen geleden
  • You guys should do a video on the evolution of elephant trunks. Like, how did that come about? What did the ancestors look like, and why did the trunk give them an advantage?

    ScriptKeeperScriptKeeper2 dagen geleden
  • Did dinosaurs shed

    Aiden GastelumAiden Gastelum3 dagen geleden
  • Me: "Oh man, I think I've subscribed to a few too many channels. My backlog is way too long." PBS: "So we have a new channel that you might be interested in." Me: "Okay, maybe one more."

    ccvchargerccvcharger3 dagen geleden
  • Explain the Leviathan

    DavisDavis3 dagen geleden
  • I want to learn about dinosaurs

    Carlos Bayona CastroCarlos Bayona Castro3 dagen geleden
  • So cool you are in the best

    Drusy ADrusy A3 dagen geleden
  • Good job PBS Eons.

    suresh krishendehollsuresh krishendeholl4 dagen geleden
  • A PBS Eons video with a narrator that pronounces niche properly? Never thought I'd live to see the day

    Firstname SurnameFirstname Surname4 dagen geleden
  • Maybe a triceratops video teach me

    Rodga GibsonRodga Gibson4 dagen geleden
  • So this is how shin godzilla looked before mutation lol

    Paige LooneyPaige Looney4 dagen geleden
  • This man talks and looks kinda like Jim Haggerty from Learn Attack, and I honestly find that a bit disturbing.

    Neolexious NeolexianNeolexious Neolexian5 dagen geleden
  • Crocs are going to look like crabs in 100,000 years...or at least that’s what this channel expects me to think

    Jack AshmoreJack Ashmore5 dagen geleden
  • Enjoyed your video and I gave it a Thumbs Up

    oneshot_meoneshot_me5 dagen geleden
  • 6:44 okay that was funny 😂

    thud93factorythud93factory5 dagen geleden
  • I thought it was about how hard it is for the Crocs shoes to degrade in the ocean…

    Guanyu WangGuanyu Wang5 dagen geleden
  • Tidal mud flats in order to lay eggs. Duh. Comon man

    Dr. Florida ManDr. Florida Man6 dagen geleden
  • Florida crocs are saltwater crocs.

    Dr. Florida ManDr. Florida Man6 dagen geleden
  • Extinction is the destination of all sailing, smooth or otherwise.

    ROLtheWolfROLtheWolf6 dagen geleden
  • There was a crocodile-like reptile that was an ancestor of modern crocodiles... The Sarcosuchus! It was like 33 feet long and 4 tons! Some might be bigger. It is certainly bigger than even a Saltwater Crocodile. But it can be out-matched by another ancestor of modern crocodiles... Deinosuchus! It was 35 feet and 6 to 7 tons. And it looks like a crocodile too! Of course, they thrived in the early and late Cretaceous... And Deinosuchus died at the end of the Cretaceous. While Sarcosuchus died about 108 million years ago.

    Tarbosaurus BattarTarbosaurus Battar6 dagen geleden
  • I thought they meant Crocs shoes. Well, those are in the oceans too. #recycle

    DCfromtheVDCfromtheV6 dagen geleden
  • Look at its little arm nubbins

    meiastarmeiastar6 dagen geleden
  • 56

    Consuelo MagoConsuelo Mago6 dagen geleden
  • Links that do not exist

    Don KDon K6 dagen geleden
  • I wonder how modern whales/dolphins would handle ancient marine reptiles? Orcas would probably do fine but the rest of them I'm not so sure. Mosasaurs got pretty big and lots of teeth.

    matthew blackweldermatthew blackwelder7 dagen geleden
  • This is Siri from two years ago, here to remind Blake to do a video about placentas

    JoeJoe7 dagen geleden
  • Crock our world. i love this channel so much lol.

    Jamie BarracloughJamie Barraclough7 dagen geleden
  • Magyarosuchus sounds like "Hungarian crocodile"

    Andrean RomankyAndrean Romanky7 dagen geleden
  • 2:46 That fish's face though.

    Blinky LassBlinky Lass7 dagen geleden
  • Melvoni ep out now

    Androsky LaboissiereAndrosky Laboissiere7 dagen geleden
  • Are there any examples of land animals becoming acuatic to the point that they redevelop gills or some other path to breathe underwater?

    Andres HernandezAndres Hernandez7 dagen geleden
  • Alright that joke was fire

    ThirstyFajitaThirstyFajita7 dagen geleden
  • Demonology! The earth is ten thousand years old!

    David NomackDavid Nomack7 dagen geleden
    • @Freedom Anderson my comment is sarcastic. Poking fun at young earth creationists.

      David NomackDavid Nomack3 dagen geleden
    • Where are you getting 10,000 years from? Also, demonology is the study of demons. Something scientists do not believe in or study.

      Freedom AndersonFreedom Anderson3 dagen geleden
  • can you talk about Amphipods next?

    Daisy DeeDaisy Dee8 dagen geleden
  • How about a video on everything involved with the evolution of sleep in humans and animals.

    PowerScissorPowerScissor8 dagen geleden
  • Plesioth

    Happines With less SHappines With less S8 dagen geleden
  • blake exuding some serious dilf energy.

    very coolvery cool8 dagen geleden
  • stop the jokes. Stop the jokes. Stop the jokes.

    eveeve8 dagen geleden
  • You know what ? You're just a Metriorhynchid So THERE !

    mikepettemikepette8 dagen geleden
    • yeah I'm just impresssed I spelled this creatures name right name the first time without looking it up.

      mikepettemikepette8 dagen geleden
  • as if mesozoic seas weren't terrifying enough already

    mayoite160mayoite1608 dagen geleden
  • 0:28 The real owner of that jaw was idenitfied...it was timmy!

    TheEVEInspirationTheEVEInspiration8 dagen geleden
  • Maybe it's fate... we must return to water and become marine humans with flippers!

    wizzzer1337wizzzer13378 dagen geleden
  • Please do an episode about the evolution of dolphins.

    LL TLL T8 dagen geleden
  • I’d be interested to learn how elephants (and similar animals) got their trunks. It’s an amazing adaptation.

    TTMO20TTMO208 dagen geleden
  • The nub legs really diminish from the 'I'm an apex predator' aura...

    Ilex AterIlex Ater8 dagen geleden
  • It’s simply amazing how old earth is...that these creatures can over 100s of millions of years evolve into so many different species...on a slow day to day basis. Great video

    Robert DiehlRobert Diehl8 dagen geleden
  • I can tell u all those crocs ur family threw away arent thriving well in the sea...

    SSGSS BeetSSGSS Beet8 dagen geleden
  • I genuinely wish a apex (ish) predator marine reptile survived today. Thankfully we do have sea turtles, but they're still not the same. It would be awesome to have a mosasaur like animal alive today just to see how it hunted and how it moved etc... Even with dinosaurs we have surviving members of the species that allow us to draw from in regards to behavior, movement etc... The cassowary is similar to dinosaurs like dilophosaurus in that both had similar head crests, coated in the same material, same method of walking and foot design etc... So we can draw a decent bit about how theropod dinosaurs moved and acted. But there's nothing alive today that was like a pliosaur/pliesiosaur or mosasaur. So it's difficult to know just how they moved and hunted. Our best estimates are just assumptions. With theropod dinosaurs much of it is essentially settled fact in regards to movement and posture.

    Antioch IVAntioch IV8 dagen geleden
  • jdjdjsjej why did i think they were gonna be talking about the shoe

    Christie McMullenChristie McMullen8 dagen geleden
  • When dinosaurs where everywhere why where there no marine dinosaurs?

    Hubert FranzHubert Franz8 dagen geleden
  • yeah it is cool learning new stuff but I am here for the cringy jokes at the end.

    Константин ИвановКонстантин Иванов8 dagen geleden
  • Been watching PBS for over 20 years

    Alien SteamboatAlien Steamboat8 dagen geleden
  • PBS Terra ehh?

    The Terran InformedThe Terran Informed9 dagen geleden
  • I'd like to see episodes about what I've heard called "wastebasket taxa:" the group designations given to stuff we tend to toss organisms into when we just don't know where to put them (protists, worms, etc.). I liked the Tully monster episode and this is like the flip side of that. Also an episode about how fungal mycorrhizae acted as roots for land plants until they evolved their own, and how plants and fungi still rely on each other (including mycoheterotrophs!).

    Sarah WestSarah West9 dagen geleden
  • Maybe people's fear of the oceans and different areas are linked to genetic memory from eons past?

    Nocturnal AquaristNocturnal Aquarist9 dagen geleden
  • I always fantasize about killing all species of crocodiles and alligators. LOL

    QQ9 dagen geleden
  • Maybe next time we found Flying Croc

    Calugarul VladCalugarul Vlad9 dagen geleden
  • If I would find a snake underwater I would FLIP OUT

    Deecy PDeecy P9 dagen geleden
  • They're basically said "Forget this, I'm going back to fish"

    TinaTina9 dagen geleden
  • That plesiosaur image is why thalassophobia exists

    KreigslerKreigsler9 dagen geleden
  • Evolution is for idiotz

    J04ck1M 26J04ck1M 269 dagen geleden
    • Evolution is observable. If you do not accept evolution do you have an alternative explanation?

      Freedom AndersonFreedom Anderson3 dagen geleden
  • Why air breathers took over so many niches in the ocean is one of the most fascinating parts to me. It seams that things with gills that don't have to surface and can stay down as long as they want would have the advantage I know there were Whale size fish at one point. I want to learn why.

    RedRocket4000RedRocket40009 dagen geleden
  • Until u go extinct it's useful Maybe in future humans adapt to toxic polluted environment

    Daniel ArcDaniel Arc9 dagen geleden
  • 6:45

    David MejiaDavid Mejia9 dagen geleden
  • Always Amazing Blake! Evolutionary Escapades! :D

    OzRevolutionOzRevolution9 dagen geleden
  • I would like to please point out that this guy is not only for int great shape, he is very well educated, and an excellent presenter. If anyone could let me know his name it would be greatly appreciated. P.S this is purely for educational purposes....

    The PoonisherThe Poonisher9 dagen geleden
    • He gives his first name near the end, and he's listed in the credits.

      j kj k8 dagen geleden
  • 'As deadly in the water as megaladon on land' 🤷🏼‍♂️

    Sam BomorseSam Bomorse9 dagen geleden
  • You should talk about ghosts, and why there are human ghosts, but no ghosts of all the other billions of animals.

    culwinculwin9 dagen geleden
    • Ghosts are a metaphor for unfinished business. Most ghost myths mention a tragedy.

      Freedom AndersonFreedom Anderson3 dagen geleden
  • Generating your own body heat is both a benefit and a hinderance in the ocean as it burns a whole lot of energy which might mean starving to death in the vastness of the ocean while looking for prey.

    Dominic ManesterDominic Manester9 dagen geleden
  • It's always the volcanoes 🤬🧨🧨🧨🧨🧨☄☄🔥🔥🔥🔥🔥⛈⛈⛈⛈⛈⛈

    Jamil AhmedJamil Ahmed9 dagen geleden
  • Haha.

    Mark LMark L9 dagen geleden
  • When did it become acceptable to use "thrived" instead of "throve"?

    Ann VictorAnn Victor9 dagen geleden
  • 99.999% of what is said here is a mix of guesses, assumptions and fabrications. There's one aim in mind of publisher: Brainwash idiots into the badly falling Darwinism.

    H R SolimanH R Soliman10 dagen geleden
  • Hey PBS Eons please make a video about Liopleurodon 🙏🥺

    Oscar JacquotOscar Jacquot10 dagen geleden
  • 0:35 Awwwe, that picture makes it look like it had little puppy ears: _woof, woof!_ :3 If it wasn't for literally every other morphological feature, I'd wanna keep it.

    Leo AlexanderLeo Alexander10 dagen geleden
  • I wonder what my Convergent bother looks like lol

    MrBargillMrBargill10 dagen geleden
  • D'awww wook at his widdle awrms 0:35

    Zwickerly2Zwickerly210 dagen geleden
  • the evolution of redwood trees

    alan the pengens jongalan the pengens jong10 dagen geleden
  • do a e.p on the the evolution of redwood trees

    alan the pengens jongalan the pengens jong10 dagen geleden
  • can you do a ep in redwood ?

    alan the pengens jongalan the pengens jong10 dagen geleden
  • The only reason why there is still some doubt about the reproduction of metriorynchids is that they are archosaurs, and there is not a single case of living or extinct archosaur that gives birth to living young. Archosaurs seems to really like their eggs.

    Joschua KnüppeJoschua Knüppe10 dagen geleden
  • Me: *laughs in Australian*

    Stellar SkittlesStellar Skittles10 dagen geleden
  • Blake: The sexiest science digest persona ever evolved. Sorry, ladies, it's just biological fact. Ladies, I love you for your minds. But Blake... To quote "The Nanny," "Hoo-Haahhh!" Those shoulders. That solid frame. That depth of vocal tone. His wife, may she forever know, people the world over are eating their/our hearts out, so to speak.

    Herne WebberHerne Webber10 dagen geleden
  • Biggest dad joke of all time

    Oxford StriplinOxford Striplin10 dagen geleden
  • I knew of Geosaurus (from many an old dinosaur book, e.g. I believe Golden Books with Zallinger as illustrator) but were not aware of the bushiness of this family. Thanks.

    Zhu BajieZhu Bajie10 dagen geleden
  • Now you have to do a episode on the evaluation of dolphins

    Linnea LjosenvoorLinnea Ljosenvoor10 dagen geleden
  • I'm a fan of alternate history. And sometimes, I extended it to the the times before even mankind will roam the Earth. So here's my question here: What if the giant sea mammals roamed the oceans during the Mesozoic instead of the giant sea reptiles?

    lerneanlionlerneanlion10 dagen geleden
  • Very nice pronounciation of the hungarian phoneme 'gy'!

    JVTJVT10 dagen geleden
  • "croc relative" ok so then it's not a croc it's an amphibian that happens to be a reptile

    shaxow11shaxow1110 dagen geleden
  • Is there animal that tertiary aquatics?

    Sondi RobiantoSondi Robianto10 dagen geleden
  • "metriorhyn-kids" nice pun i cant help but applauds xD

    SinZetoSinZeto10 dagen geleden
  • Evolution=cryptozoology. NO DIFFERENCES . Gosh, this is what I come here to watch.

    Adam JonesAdam Jones10 dagen geleden
    • Evolution is observable. Cryptozoology is in no way related.

      Freedom AndersonFreedom Anderson3 dagen geleden
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