When Giant Amphibians Reigned

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Temnospondyls were a huge group of amphibians that existed for 210 million years. And calling them ‘diverse’ would be putting it mildly. Yet in the end, two major threats would push them to extinction: the always-changing climate and the amniote egg.
Thanks to Ceri Thomas for the very cool Temnospondyl reconstructions throughout this episode. Check out more of Ceri's paleoart at / alphynix and nixillustration.com
And thanks as always to Nobumichi Tamura for allowing us to use his wonderful paleoart: spinops.blogspot.com/
Produced for PBS Digital Studios.
Super special thanks to the following Patreon patrons for helping make Eons possible:
Katie Fichtner, Aldo Espinosa Zúñiga, Anthony Callaghan, الخليفي سلطان, Gabriel Cortez, 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, Jon Monteiro, James Bording, Brad Nicholls, Miles Chaston, Michael McClellan, 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, Alex Yan
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References:
Gaining Ground: The Origin and Evolution of Tetrapods, Second Edition by Jennifer A. Clack.
The Rise of Amphibians: 365 Million Years of Evolution by Robert Carroll.
Amphibian Evolution: The Life of Early Land Vertebrates by Rainer R. Schoch.
Earth Before the Dinosaurs by Sebastian Steyer.
How Vertebrates Left the Water by Michel Laurin.
The Late Triassic World: Earth in a Time of Transition, edited by Lawrence H. Tanner.
The Story of Life in 25 Fossils: Tales of Intrepid Explorers and the Wonders of Evolution by Donald R. Prothero.
rspb.royalsocietypublishing.or...
academic.oup.com/zoolinnean/a...
www.researchgate.net/publicat...
“Fishes and Amphibians From the Late Permian Pedra De Fogo Formation of Northern Brazil” by Cox and Barry, 1991.
www.jstor.org/stable/4524569
“Lower Triassic Temnospondyli of Tasmania” by Cogsgriff, 1974.
onlinelibrary.wiley.com/doi/p...
www.researchgate.net/publicat...
www.tandfonline.com/doi/abs/1...
onlinelibrary.wiley.com/doi/a...

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25 июн 2024

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Комментарии : 1,2 тыс.

@sterkar99 5 лет назад

All the hosts on this channel are just so kind and likeable

@nealsterling8151 5 лет назад

Indeed, but they should slow down a bit, i'm getting palpitation by just trying to follow their talking speed.

@ragnkja 5 лет назад

Thraazon 1976 I’ve found that turning on captions helps me understand what they’re saying, even though I hear reasonably well.

@ObjectsInMotion 5 лет назад

They're also really nice in real life as well! Got the pleasure to meet many of the PBS team in Anaheim last summer.

@puffdaddy69 5 лет назад

Neal Sterling *in settings, turn playback speed down a notch, might help*

@nahidawani7158 5 лет назад

Especially Blake!

@TragoudistrosMPH 5 лет назад

Funny how a show about everything dying can make one feel so alive with wonder :)

@Zeithri 5 лет назад

Makes me wish I could become a God with my own planet and just observe life and such ^^

@zacimusprime4865 5 лет назад

Tragoudistros.MPH I guess so

@Delta-ei7im 5 лет назад

Wow that is dark

@masterofmundus1304 5 лет назад

Now let's be accurate, this is a show about what we learned from the people who spend their life staring at corpses. I don't think I've ever seen them do an episode on things that are still in the process of dying, presumably because the corpse watchers don't like all the screaming.

@transnewt 5 лет назад

HHAHAHAGAGAGAGAGAHAHQHAHQHHAHAHAHAHAH...HAHAHAHQHA.

@bluebowser3121 5 лет назад

*Crazy to imagine there was such thing as salt water amphibians.*

@melvinshine9841 5 лет назад

I think modern amphibians can't handle salt water because it has an adverse effect on their skin. I can't remember how it works.

@MisterSiza78 5 лет назад

@@melvinshine9841 maybe because it will dry out due to osmosis?

@tec-jones5445 5 лет назад

@@melvinshine9841 their skin is very delicate, as they need it to absorb water through their skin. Unlike these ancient ones, today's amphibians not only need water to breed, but also to stay alive as adults. They don't have scales or tough skin to keep water in. So they are restricted to water. Because of this permeable skin, salt can easily damage because of how easily it is absorbed through water. And without proper salt filtering kidneys or organs, the salt becomes toxic. That's not to say salt water amphibians might not appear again. If the right selective pressures are made available, then such amphibians might just evolve independently again given enough time.

@timeshark8727 5 лет назад

You are correct sir! The higher salinity of ocean water will pull water out of modern amphibians (and most freshwater fish) too quickly for them to replenish it. Mainly due to how poorly their skin tends to hold in water to begin with.

@timeshark8727 5 лет назад

doesn't surprise me, frogs tend to try eating anything that can fit in their mouths.

@MrStensnask 5 лет назад

We're getting closer to a whole episode dedicated to the evolution of the egg. Eggcellent.....

@zhugedai1279 4 года назад

Why why why

@kianmills4170 4 года назад

S T O P

@reuireuiop0 3 года назад

How Eggciting 😁

@iainburgess8577 2 года назад

Eggsactly. It should be Eggstrordinary.

@harmitchhabra989 2 года назад

@@iainburgess8577 would*

@lazyperfectionist1 5 лет назад

Don't forget to make a video about placentas.

@hojjat5000 5 лет назад

How come I see your comments on different channels and different videos? Is it because I probably commented under one of your comments and now RU-vid thinks we're friends?

@zhugedai1279 5 лет назад

Really wish it was made by now, im really curious why live birth developed

@puffdaddy69 5 лет назад

And how Hollywood freaks cook their babies placentas like a steak on the BBQ?

@KOKO-uu7yd 4 года назад

I just went looking, and I didn't find it.😭 So either it's forgotten, or I just missed it.

@glennsommer8901 4 года назад

still waiting buddy

@TctyaDDKhang 5 лет назад

Idea: Learn to use an egg "I was already doing that" Use a stronger egg. Put water in it. Have the baby, on land, in the egg, water is in the egg, baby in the egg, in the water, in the egg. Works for me. _bye bye ocean_

@shalberus 5 лет назад

I literally scrolled into the comments section specifically to look for this comment so I could thumbs up it.

@breebell468 5 лет назад

@nathanross7448 5 лет назад

We can make a religion out of this

@FireflyJuu 5 лет назад

@@nathanross7448 No, don't

@hamishm29 5 лет назад

@anime fantasy123 the sun is a deadly laser

@rq170Sentinel 5 лет назад

Imagine those giants croaking in the evenings. Metal concerts would have nothing on them and no sleep for anybody.

@RJALEXANDER777 5 лет назад

Koolasuchus sounds like a pretty good name for a Garage Band.

@5daboz 4 года назад

ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-wYps-kGPh78.html

@robwalsh9843 3 года назад

@Madalin Grama True but there were a pretty wide variety of species, including land dwellers. It wouldn't be out of the ordinary if they had vocalizations.

@LimeyLassen 5 лет назад

Fun fact: "newt" used to called "ewt", but people said the phrase "an ewt" so much that the N got stuck.

@mattdziedzic7686 5 лет назад

Very nice

@RJALEXANDER777 5 лет назад

"She turned me into an ewt!" "An ewt?!" "...I got better."

@slappy8941 5 лет назад

@@RJALEXANDER777 BURN HER!

@Mysterytour7 4 года назад

Lol! The reverse happened to an apple = a naple

@ferengiprofiteer9145 4 года назад

An ewt is a newt, of course, of course.

@BenadrylNumbercrunch 5 лет назад

you keep calling that thing weird names when it's obviously a quagsire

@zoerronquillo1844 5 лет назад

and mudkip

@ErdingerLi 5 лет назад

Whooper~

@Ravenkiko 5 лет назад

I had the exact same thought at first lol

@Verdinhox2 5 лет назад

wich thing are you referring to

@senecagordon5472 5 лет назад

Probably the quagsire

@VaradMahashabde 5 лет назад

"But by now you know, all success is fleeting" --Motivational speech by Blake

@sandramueller2592 2 года назад

My sister moved out to the country where she thought it would be quiet. In the spring the frogs mate and it is just a cacophony for about a month. His line at the end about the frogs made me think of this.

@AlishN7 5 лет назад

I just love how Blake embraces his awkward hyperactiveness. Never change and keep drinking coffee.

@diegog1853 5 лет назад

"Fans of this channel will know that the permian ended 252 million years ago" amm... yeah sure... i know that. Just a regular fan here that knows stuff

@srimasis 5 лет назад

Noooooooooooooob

@robinchesterfield42 5 лет назад

The Permian ended REALLY DRAMATICALLY 252 million years ago...along with almost everything else. Look up "The Great Dying"; it's...interesting. Actually look up the Permian in general--the "mammal-like reptiles" are awesome, related to us, and an entire sub-group that aren't around anymore.

@diegog1853 5 лет назад

@@robinchesterfield42 i knew about the Great Dying, just didn't know the exact year lol

@mizzshortie907 3 года назад

@@diegog1853 ikr same

@fazeedkotta2580 5 лет назад

Could you do a video on Molluscs and their evolution? I think that would really interesting.

@MisterLitera1 5 лет назад

Walking with dinosaurs nostalgia anyone?

@jivejunior8753 5 лет назад

I think you'll find that that video is about cephalopods, and mollusks comprise much more than just cephalopods.

@jensphiliphohmann1876 5 лет назад

There is an idea that some cephalopods might become land dwellers and some of them maybe our successors as a civilization building species.

@KlavierMenn 4 года назад

@@jensphiliphohmann1876 I heard about that. There's more: some are starting to actually socialize, due to evolutionary pressure caused by us, and they are making nests together, which seems to be an odd behavior

@MossyMozart Год назад

@@jensphiliphohmann1876 - I would agree with you, since they are so very highly intelligent, except that they have such a cruelly short life span.

@naoko7038 5 лет назад

I like how you actually credit other makers work unlike most other science channels! This was also very informative

@marchismo8514 5 лет назад

I really enjoy the content on this channel. I'm a Geologist so it's all very interesting to me. Can I make one small suggestion though, I appreciate having more context and in particular where subjects are located in the world at any given time in history. Could you perhaps add more locality maps (with the continental reconstructions at given time periods as base maps) for each of your fossil mentions or rock formation descriptions? It would help people visualize where things existed on Earth in the past. Thanks and keep up the great work!

@sixfeetundertheradar6080 4 года назад

Marchismo 85 I wish. Honestly my biggest problem with dying is that I won’t get to see all of the new animals and evolutions of the future

@neverdullday7432 5 лет назад

Can we get a prehistoric Australia video? At least Megalania!

@neverdullday7432 5 лет назад

no idea what you're talking about

@TheDinoshark 5 лет назад

At, the very least they're acknowledge Australia's existence.

@raunakroy47 5 лет назад

You just read my mind

@brandedfate 5 лет назад

I would like a video on prehistoric marsupials as well.

@theofficalchairmanrevoluti614 3 года назад

YESYESYESYESYESYESYESYESYESYESYESYES- *YES*

@harrietlyall1991 5 лет назад

As a Scot, I am so proud to learn that Amhibians first evolved in our primeval swamps here in Scotland. Nessie is their most renowned descendant.

@hmeaney19 4 года назад

SCOTLAND!!!!!!

@SC-zq6cu 3 года назад

Ah yes, Australia trying to be weird since the first land vertebrates appeared.

@IuliusPsicofactum 5 лет назад

Great episode. Nobody talks about the giant amphibias very often.

@troyandskyelar9588 3 года назад

And yet they’re one of the coolest groups of animals to have their turn at reigning on earth.

@adronator 5 лет назад

Still would really love to see the evolution of spiders.

@josephlongbone4255 2 года назад

It's very hard to get fossils for small arthropods, they don't preserve well unless you get rare stuff like amber or things like the Messle shale. As such we don't really know, which is a shame.

@MerkhVision 2 года назад

No! Just… NO!

@mmaxmax6 2 года назад

@@MerkhVision why not? they're fascinating little creatures

@sorrenblitz805 2 года назад

We have some. Some of the earliest "spiders" come from the carboniferous period, mygalomorph spiders, which include modern day tarantulas, come from this period and we know of some true spiders from the end of the Jurassic period and the Cretaceous period. It's likely they evolved from sea-whip scorpions that lived along side other arachnid ancestors like Brontoscorpio.

@MossyMozart Год назад

@The Adronator - I saw a show ("Nature"?) that discussed modern spiders. I remember them remarking on spiders in meadows where there are maybe 1,000 or so per square meter.

@TheRedVoyager 5 лет назад

I would definitely watch an episode on placentas

@Nrex117 5 лет назад

You guys should do a video on prehistoric crocodilian diversity.

@Diepzeevis 5 лет назад

This channel is so wholesome, with an amazing amount of information condensed into ten minute videos, great level of information with a good amount of science added in, its relaxing music, silly jokes and likable presenters (all of you!). Keep it up, I love it!

@NelsonDiscovery 2 года назад

A wholesome channel full of mass-extinctions lol

@MossyMozart Год назад

@@NelsonDiscovery - And vicious carnivores, like T-Rex, Bear-Dogs, and Bone Crushing Dogs.

@Kroggnagch 2 года назад

I wish so incredibly badly that I could go back in time in some sort of space/time-bubble where I couldn't affect anything and vice-versa so I could see all the critters that used to exist. Imagine all the ones we don't even know of that filled unique niche parts of the ecosystems.

@CybranM 5 лет назад

Its great that you show both metric and imperial, too many american channels only show imperial. Thanks for another great episode :D

@gideonjones5712 5 лет назад

I love amphibians, especially salamanders. Ancient amphibians have always fascinated me, thanks for the video!

@aaronmarks9366 5 лет назад

I love amphibians, so this was a great choice for an episode! Can you do a follow up on how frogs, toads, salamanders, newts, and caecilians all diverged from each other?

@juanlugarciamorato5177 5 лет назад

Please you can do a video about how rhinos got ther horns?

@FireflyJuu 5 лет назад

Looking forward to the placenta episode, eons is on a role lately

@pizmak 5 лет назад

I think that I recognize one of the pictures of Metoposaurus as a speciment form Krasiejow in Poland, the last one. I used to volunteer in excavations at that site, and I recognize the skeleton.

@sagetmaster4 5 лет назад

You guys should do a video on the super early primates like the Purgatorius titusi

@eons 5 лет назад

Stay tuned! (BdeP)

@vennril 5 лет назад

Found this in my recommendations and within the first minute I hear the term "armor-plated KILLERS", uuuusually a sign to switch to a more credible documentary. But this time I'm glad I stayed.

@hilfsmittel7934 5 лет назад

A video about the *evolution of sexual reproduction* would be interesting.

@edthurber6265 5 лет назад

Already did. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-qsn4z7bNb14.html

@hilfsmittel7934 5 лет назад

@@edthurber6265 Oh, thank you, didn't notice that one

@richardadams4928 4 года назад

I don't care to have documentarians following me all about, but appreciate the thought....

@sadgirlhours4088 2 года назад

Oh what a wonderful world we would be living in if temnopsondyls never went extinct :( the artistic renditions of them are so cute :( I miss them

@grexjr1420 4 года назад

Learning about all of this just makes me appreciate how incredibly rare and beautiful the story of life is. How amazing it is that one planet in the vastness of the universe created such diverse, sometimes otherworldly, and yet all essential animals and life.

@dwarfbunni 4 года назад

WHERE IS THE PLACENTA VIDEO!? honestly, I'm joking however that sounds incredible

@russkiydeutsch990 5 лет назад

Amphibians>>>>>Everything else

@coreytaylor447 5 лет назад

NO. CHOOSE LAND OR WATER. CANT HAVE BOTH.

@russkiydeutsch990 5 лет назад

Corey Taylor LIES

@russkiydeutsch990 5 лет назад

D r . S p u d True

@magnuspeacock5857 5 лет назад

HAVE YOU SEEN PLACEDERMS?

@themaximus144 5 лет назад

I really have to say that after following you guys for a while now, this is the best RU-vid channel you guys from sci show and Hank Green's crew have created to date. I'm so glad you guys teemed up with pbs to create this project, because it's been a real joy to watch progress.

@faustianrevival3816 5 лет назад

Adapt to emerging threats or be wiped out. Lesson learned. Thanks for the video.

@veecee3669 5 лет назад

I just discovered PBS Eons, and I love it! It's so interesting, with cool pictures and descriptions. I'll be visiting often, thank you!

@dariusrose9909 5 лет назад

Could you do a video on the Creodonts and Entelodonts!

@persycon 5 лет назад

He is a golden narrator!

@veggieboyultimate 5 лет назад

So it’s important to know that amphibians were one of the first animals to conquer land and now we are hunting them to near extinction for development.

@jorgegar1993 5 лет назад

This channel is one of the best ever! It is pretty interesting to consider the possibility that the Gymnophiona (Caecilians) may have had a separate evolutionary origin than the Caudata (Salamanders) and Anura (Frogs). You guys should do videos on some of the more obscure yet very important animal phyla out there and their evolutionary origins: Bryozoa, Annelida, Brachiopda, Nemertea, Hemichordata, Nematoda, Priapulida, Rotifera, Platyhelminthes, etc...

@celtgunn9775 5 лет назад

I absolutely love when he does the episode about the different animals. His presentation is so refreshing. So wonderful. And when he pulled out the phone & told it to remind him to do an episode for us on a specific topic. I'd like to know more about flowers & what the oldest fossil known is. I love flowers, bees, butterflies. 😊🐝🦋🌻

@nicks1451 4 года назад

If you camp here in Florida, you can hear gigantic bull alligators calling out at night. They're so loud, the entire forest shuts up in fear, including the campers. I can only imagine what these giant amphibians would have sounded like when they called out.

@exoboi6974 2 года назад

I find it interesting that giant amphibians are still around in both Japan and China

@SuicideBunny6 5 лет назад

8:14 But all that changed when the aquatic amniotes nation attacked ...

@Ganymede1001 5 лет назад

This channel is what we all need!

@TheJasonmassia 3 года назад

This might be one of my favorite Eons videos yet.. Great work!

@NelsonDiscovery 2 года назад

That outro line is inspired by the similar outro of some dinosaur documentary. "When you listen to the chirping of birds remember the great creatures they are related to." Or something like that. And then they the superimpose the image of a T-rex on a bunch of birds. Damn... It's so long ago I can't remember.

@zeynaviegas5043 5 лет назад

an episode about placentas. I can't wait for that! call it "the ascension of placentas"

@joshbroke8965 5 лет назад

This channel makes my inner child so excited every time I receive a notification that there is a new video. Love it, with the videos were a bit longer tho lol

@aciebel8313 5 лет назад

Thanks, Blake, for yet another interesting and entertaining episode. The artwork that Ceri Thomas provides is beautiful and helps us all get a better idea of what these animals all looked like.

@sonjavandenende9586 5 лет назад

Thanks for another great video! I look forward to every Eons episode and I especially love the ones that introduce me to things I'd never known, like this one has.

@digitalchameleon1884 4 года назад

Amazing. Great delivery, subbed and after looking at what else you have done, phew gonna be some hours spent here now. Peace buddy thanks.

@SuperLoops 5 лет назад

I love Dimetrodons there was a picture of one in my dinosaur book and it looked really happy. and so does 5:21 :D if I lived in the Permian I would have a pet one

@fen740 5 лет назад

Wow, y'all really are the greatest. I noticed this in my feed while taking a break from researching the ecological pressures on early amphibian diversification and smiled wider than I have all week! As always, beautifully informative and accessible. Please keep it up!

@talonflame_brawlstars.7208 Год назад

I am so very grateful to get some clarification on these absolutely adorable oddball creatures.

@jjhuerta100 5 лет назад

Episode on monotremes would be pretty cool

@jasonfrye4669 5 лет назад

jjhuerta100 kool

@jancukasu 5 лет назад

6:31 Awesome! Thank you!

@matthewludivico1714 5 лет назад

I love this video for how the narrator pronounces so many latin names of extinct animals, so easily. Absolutely inspirational!

@LeeannG 2 года назад

As a photographer, I can’t tell you how happy it makes me to see image credits!

@dionneelsayed3890 5 лет назад

Oh man I love this channel. Every single episode blows my mind. Does anyone know where I can get more content like this?

@storytellingsnek5255 2 года назад

Trey the Explainer and Ben G Thomas also do some interesting paleontology vids

@DuluthTW 5 лет назад

Huh. Really interesting. I learned a lot. I love this series. Thanks for sharing!

@dustinfreeman1451 5 лет назад

Imagine when we come across those giant amphibians today. That could really blow our minds.

@Clearlight201 5 лет назад

There's an absolute ton of information in each of your amazing videos. Thank you very much!

@GogetaVegeth98 4 года назад

Love this channel videos a lot! Keep going like that guys P.S. Still waiting that placenta episode 😂

@citiesskyscrapers4561 5 лет назад

Do a video about elephant evolution please.

@scaper8 5 лет назад

Yes. All the crazy extinct elephants alone would make a great video. Add to that how, when, and why they diverged and where the separation from what would become hyraxes would be amazing!

@joelalain 5 лет назад

lolll i love the light humor and the cast for PBS Eons, all great!

@celiphon3812 5 лет назад

i’ve been binge watching these videos all day

@DutchBane 5 лет назад

I so love this channel

@zimautanimation 5 лет назад

Dude, those joke with your phone is so bad its feels goood LOL

@Mjmannella 3 года назад

And it came true as well!

@danj3581 3 года назад

PBS Eons is the greatest thing to happen to RU-vid, and my fascination❤️

@angeliquebarbey8340 4 года назад

One usually does not hear about the evolution of the amphibians. I am glad that this subject is dealt with here!

@QsPhilosophy 5 лет назад

Do a video about the giant ground sloths! Megatherium and such

@Soruxx 5 лет назад

How cool was the koolasuchus?

@rubenskiii 5 лет назад

I love ur videos! I particularly like how you show the names on screen so you can google these long gone fellows and be even more amazed by their discovery stories and weird nephews they had...

@PrehistoricAustralia 3 года назад

Always nice for extinct Australian animals like Koolasuchus to receive some media attention :) Australian palaeontology is highly underrated.

@bluemanno7901 2 года назад

Stupid crocodilians had to send all those cool giant amphibians to extinction 😞

@jasminejenkins6557 2 года назад

Thanks for these facts I am 8 years old and I have to learn about dinosaurs at school

@walkerweyland7685 5 лет назад

I would love to see a video about how the reconstruction of the Tylosaurs has changed over time. Keep up the great work!

@jora9655 5 лет назад

Little is more fascinating than "old models" of life. The out-of-production line, those that were superceded. The Perm and earlier are truly stunning.

@annikathewitch3950 9 месяцев назад

Still waiting for that episode on placentas...

@Ivar2x4 5 лет назад

I'm loving this show more every episode

@shruggzdastr8-facedclown 5 лет назад

Thanks for this video on the Age Of The Great Amphibians!

@Peusterokos1 5 лет назад

Dayum, the last time I was this early on PBS Eons' newly released video, giant fungi were all up in here!

@skoobydoofus5997 4 года назад

Blake: "...Frog like teeth, as well" Me: "Frogs have teeth?"

@casper6405 5 лет назад

Wasn't koolasuchus also in walking with dinosaurs Loved that show

@benjafranklin5996 5 лет назад

This channel should be way more popular

@kiera_rdh6697 5 лет назад

Eons is one my favorite RU-vid channel! Looking forward to that placentas episode!

@novakei1 5 лет назад

Koolasuchus? I think you mean Quagsire.

@toby-os4fi 4 года назад

Koolaidsuchus

@Ciech_mate 5 лет назад

Thank you for finally saying 'niché' properly

@blindalleycomics6351 5 лет назад

Thanks for this episode! Amphibians often get shuffled out of the way when talking about earth's evolutionary history; it's difficult to find information about their amazing adaptations and evolution. Keep up the good work!