When Dinosaur Look-Alikes Ruled the Earth
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- Опубликовано: 19 июн 2024
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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
Fabrizio de Rossi: / artoffabricious
Franz Anthony: franzanth.com/
Julio Lacerda: / juliotheartist
Nathan E. Rogers: 252mya.com/gallery/nathan-e-r...
This video features this Paleogeographic Map: Scotese, C.R., 2019. Plate Tectonics, Paleogeography, and Ice Ages, RUclips video: • Scotese Plate Tectonic... .
Produced in collaboration with PBS Digital Studios: / pbsdigitalstudios
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References: docs.google.com/document/d/1V... 
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Oh the good old Triassic, when you have dinosaur-like crocs running rampant on land, but everything in the water that looks like a croc is not a croc.
@@glennsommer8901 Proterosuchus is an Archisauriform, but not a crocodilian or a true Archosaur
*Postosuchus joined the chat*
Well it's kinda bizarre amphibian, reptile, and dinosaur species (even a mammal species that were predecessors to whales) that lived a semi-aquatic lifestyle kept on evolving into crocodilian forms at least half a dozen times alongside "true" crocodiles.
Lmao
the triassic was like god's deviantart phase basically
It seems like every type of animal or plant had a golden era when it ruled the world
Probably will be the same with humans
@@wemustconquer3510 When Sapiens ruled the world
@@SirEnd3r told by hyper intelligent sloths
Sounds grim for humans lol ..
@@recreantjournals6723 But the sloths look forward to it, and so does the rest of the animal kingdom.
I love how they say ‘we don’t know’ on this channel. Why did this weird thing happen? “We’ve no idea - isn’t that exciting?!”
Yeah! I love it.
Scientists are like that :))
If you knew the answer to everything, there would be no point in doing research... or making videos like this. I for one would go extinct from boredom.
Its better than bullshitting, to admit ignorance is the first step to wisdom.
Reason I love scientists.
Even in paleontology hips don't lie lol
Thanks Eons for another great video
Underrated comment! xD xD
Can we get someone to pin this comment please? lol
r/unexpectedhololive ?
XD
@@roaklarson9699 did someone say hololive?
The Triassic is one of the most interesting eras that no one talks about. There's the common stigma that dinosaurs were always large and in charge for their entire time of existence, and that assumption writes off all the other animals that lived alongside them that deserve more representation.
Nah man eff diversity lol
I think the Permian is even more underrated.
@@AspireGMDFinally, a man of culture
Well in that case wouldn't dinosaurs be rauisuchian look-alikes, given that rauisuchians were clearly first
Ah, but history is written by the victors 😂😂
By that logic, dolphins are ichthyosaur look-alikes.
AirCooledMan2006 ichthyosaurs are just fish lookalikes.
@@robertohalloran7743 🤨🤔😏😁😆😅
B Ali they occupy different niches unique to dolphins and icthyosaurs and look quite different to most fish
To everyone nostalgic for the classic but inaccurate featherless dinosaurs:
Have I got an animal YOU!
I know, right? They look more like the dinos in most books than actual dinosaurs 🤣
Eh, lets not forget that a lot of dinosaurs were in fact featherless. Large animals tend to be hairless, like elephants or rhinos.
@@ekszentrik Maybe not completely featherless, but just a lot less feathered than the smaller ones, big mammals still have hair, just a lot less than the smaller ones
ekszentrik their hair just short, they are not hairless.
@@ekszentrik Keep in mind that wooly versions of both of these lineages existed alongside humans.
It's just that all animals need ways to regulate heat. For many dinosaurs such as tyrannosaurs, there is evidence that the younger ones absolutely had feathers, whereas the older, bigger ones might have had fewer or even none- size itself helps retain and generate heat. But things would be different in colder places, and of course some species might retain sparse feathers for display or other purposes too. As it is, there are an awful lot more dinosaurs which are proven to have had feathers than ones which are proven to have had only scales; the latter group was definitely an exception, not the rule, even for larger types.
When reptiles looked more like the dinosaurs we envisioned a decade ago.
More than a decade, but I get it
exactly what ithought, rassuchians look like "old" dinossaur
Same wavelength
That's because we tried to analyse them by having a foundation of knowledge on reptilians .
The word dinosaur comes from Greek meaning terrible lizard .
So that's where it all starts .
Good thing that changes and fits the data as it comes along.
Until we discover that the Rassucians themselves had a feather analogue or something
I guess Arizonasaurus is pretty much a 2-legged crocodile that cosplayed as Spinosaurus.
it makes more sense for spinosaurus to be the bootleg version though
@Gi Gi touche, but I'm going by which creature was discovered first.
Adam the Spiny GIANT more like that cosplayed as dimetrodon
I can't wait for it to turn out to have been an aquatic rauisuchian all along.
Doesn't have Spinosaurus' spined tail though
Imagine figuring this out while doing a project for school
Not a scientist, but I always figured that was how a masters thesis worked.
@@BonaparteBardithion yes and no. The vast majority of science work and research involves pushing at the boundaries of knowledge. However, this clip highlights the rare form of scientific discovery through serendipity. It takes the form of a significant leap beyond the boundaries.
People discover new species all the time, hell one trip to the amazon generally gets you at least 5 more species of something be it fish or insects. So it’s not hard to imagine people doing this during a project for school as we are discovering new things all the time in a variety of places
I've met Sterling a few times, he's now a professor at Virginia Tech, I believe. He's still working on Triassic archosaurs.
Funny that these rauisuchians look much more like the early depictions of dinosaurs than modern depictions of dinosaurs
@Ak Am Actually several years ago Jurassic park did release a Ornithosuchus toy which is a relative.
@Ak Am God, I'd love if Fasolasuchus appeared in JP. It's got quite the title - the largest terrestrial predator aside from large therapods - and even among therapods, it would have been decently sized. It's a quadrupedal rex the size of an allosaurus, what's not to love?
It's like Fighting a Giant Emu.
Shut up I want my rent back
We should Rename the "Dinosaur", to Feathered Giants in Latin.
2:50 looks like that goofy friend who runs around chasing butterflies
Looks like an Animal Crossing dinosaur villager
It has "meme" written all over it...
I feel attacked
That’s meee
I really hope that thing isn't real
"These aren't the dinosaurs you're looking for." *slowly waves hand*
"These aren't the dinosaurs we're looking for."
Move along, move along.
"Those aren't dinosaurs you're looking for."
Meesa understood dat reference
Aiushta: "I'm not the dryad you are looking for."
"Look at all those chickens"
Imagine that picnic!
*_The Colonel and the Chik-Fil-A cow wants to know their location_*
that are crocodiles XD
@@cardboard2night he meant the dinos like coelophysis.
Ok folks if I discover a new animal as I will name it after this channel cause eons inspired me to become a paleontologist. Thanks to them I got basic knowledge for paleontology that people from my local University that specializes in geology and has paleontology based classes can't wrap their head around, and I am so damn grateful for that!
Reminder of this promise
😊
P B S E O N S A S A U R U S
New reminder of that promise again fyi
(And it better be a Cambrian species :p)
a beaked.. bipedal... crocodilian?
*confused alligator hiss
To add to your confusion the animals we think of as crocodillians didn't appear until the Cretaceous the older croc like animals were at the closest cousins. And the recognizable subgroups like gators and crocodiles are far more recent not appearing until the Cenozoic
Any evolutionary weirdness on the Indian subcontinent while it was separated off from the rest of the world? Could be interesting
Well at that time all was very shared in species
I'd like to see the paleofauna of India's continent years. Who knows what weird animals they had?
Yes! I support this!
Doubt it was ever as weird as it is right now.
They could do a whole video on the evolution of scams.
Arizonasaurus is my favourite now because the picture of it makes me giggle.
it also looks like spinosaurus
My boy Poposaurus up there though.
It looks like it's naruto running lmao
@@ryuukatamura It looks like what we thought Spinosaurus looked like a decade ago.
I'm interested in the evolutionary origins of toxins/venoms and how the possessing animal survived the process of evolving them
Yes, it is very interesting topic. Especially for me because such animals are extremely rare where i live.
Interesting. Just when I thought I had pondered everything there was to ponder lol..
Same. I hope Eons does a video about that
I imagine this is very hard to tell, since toxins/venoms aren't preserved in fossils.
Ask australians i guess, lol
2:49 I have trouble believing that the artist who made this one was taking their work seriously!
EDIT: The pose keeps making me think of Alice dancing on the manhole cover in the Cul de Sac comic strip. R.I.P. Richard Thompson.
it looks like a dog while peeing
It might look like the awkward dingbat of the Triassic, but I think that you would respect it a lot more if it was charging at you.
@@tsopmocful1958 The Arizonasaurus design isn't what's funny, it's the goofy running pose it has, it looks like it was playing video games and then its mom yelled its full name from the other side of the house. XD
have u any knowledge that can dispute this video oh i see
I assume that its human-like feet make it look anthropomorphic, and your brain
associate that with a cartoon character. That's why you seem confused.
Man, those two-legged crocodilians look so goofy when they're plantigrade. XD
1:08
"Instead, it was a crocodilian"
I think you mean it was a Paracrocodylomorph
I love that Rauisuchians look exactly how we used to think dinosaurs looked.
The Triassic was so wonderfully, wierdly diverse!!
I'm really surprised these guys aren't more popular in pop-culture considering they look really similar to the "old school" scaly lizard dinosaur depictions.
it'll take a long time before the books we all read as babies stop looking "cool". It's pretty much a meme.
Today, not a lot of animals are bipedal. But in the Mesozoic, practically 50% of it were bipedal. It's also awesome to think how diverse life back then.
That's way too many. Fish weren't.
Today the overwhelming majority of land vertebrates are bipedal.
That shrug and "I don't know" sound cracked me up. Not usually expected from a scientific channel, but completely justified.
welp, the quote “I dont know” is pretty much why science exists
Oh look. It's a crocodile with a beak. It's the infamous crockoduck!
That's a video that I've wished for a long time.
Last time I was this early, Scale Trees trees were still growing.
Not a Dog 🤣
Thanks for your mention of scale trees, led me down a wiki rabbit hole haha
It's very strange to hear about my advisor being talked about as a grad student
How did I just learn about these animals now? I'm a huge paleo nerd and I like to think I know a lot about prehistoric animals, I guess I didn't know nearly as much as I thought lol. Great video.
"These are not the dinosaurs you are looking for."
LoL!! Now i get it...
These guys are so goofy, I love them!
That Arizonasaurus 2:51 carries this enormous croc body perfectly level on skinny men's legs.
So what I’m hearing here is Rauisuchians are more like the stereotypical “oldskool” dinosaur than actual dinosaurs are.
Crocodylians/Crocodylimorphs/Crocodiliforms were/are the most successful and unique brand of animals - they adapted to every niche and Thrive successfully even today, a truly underacknowledged animal family
Its very,very nice from you guys that you Upload content that does not just pump out clickbait on this platform!
2:49 when your dog hears your car pulling into the drive way
Can you do an episode on the evolution of eyes? Why do humans need to blink frequently but cats dont? When and why did our eyelids develop?
2:49 when you're playing dinosaurs with your 7 year old friends
And momma calls for lunch
C'mon people, let's make this a meme
But I don't have any friends...
2:50 when you sleepy AF but you still gotta run
Do you know who else looks like a dinosaur but in reality is a more magnificent beast? Ma boy STEVE holding down STILL, Dude is committed to all our educations!!
Everybody's gangsta until the crocs stands upright and runs on two legs...
I thought the Its Okay to be smart video today was EONS lol
Eons really loves to use that Postosuchus painting a lot, don’t they? 😝
This was a great video. Explaining the actual differences in the hip structure was amazing.
4:10 Yo Arizonasaurus looks like the meme where everyone was storming Area 51 lol
They brought back the Old School Dinosaurs, under a new name.
Anyone else remember Coelophysis from the Walking With Dinosaurs series? ☺️
Shame the episode didn't focus on more of the genuine weird animals that lived in the area, including more crurotarsian archosaurs besides Postosuchus. Half the animals in the episode (Peteinosaurus, Plateosaurus, cynodont) aren't present in the Chinle Fm.
If I haven't watched a new PBS Eons episode within 24 hours of its release I'm in trouble and this is my single for help
I should be sleeping....
But then Eons uploads and sleep can wait. I’m already low on sleep anyway 😂😂
Sleep isn’t as important as a new Eons video ❤️
I always wait for this channel to upload video. It's 3 AM here. And only it can make me sleep now
Dinos survived because they like Birds today have air scaks inside their bodies that along with their lungs absorb O2 from the atmosphere. Irds have them today inside their bones as did some dinos like the sauropods, and some dinos also had them inside other connective tissues like muscles andcartiledge.. Having extra ways to breathe is helpful when the air becomes hot and filled with fine sharp particles of ash. It helped the protodinos survive the Permian Mass extinction and the extinction event at the end of the Jurassic.
Mighty interesting hypothesis, sir! Hope that will catch some eyes in scientific community to do some research and publish papers. Or is it already done, beyond my modest knowledge?
*birds are dinosaurs*
This is the comment I was looking for. The emergence of dinosaurs also seems to correspond to the time where atmospheric Oxygen was at it's lowest since the great oxygenation. Although I'm not too sure of how accurate the readings are for atmospheric CO2. As someone who isn't a scientist, it seems to me like that would explain why early dinosaurs and pterosaurs would have out competed crocs, especially in active niches. It also explains why the air sac system may have evolved in the first place. I'm not aware of any papers on the subject though
*_thank you for making my days just a bit better. Best fact channel on youtube_*
+
Mine too!
Sorry you’re having a hard time. It will pass.
I'm very passionate about paleontology and this channel is the best one out there to learn more on the subject
Son: *Can we have dinosaurs?*
Mom: *We have dinosaurs at home*
Dinosaurs at home:
*Obi Wan voice* "These are not the dinosaurs you're looking for ..."
When you show a map of where the fossils were found. Could you please also show a map of the continent's from the fossils time period. It would give me a better understanding of just where they were rathe than where they were found.
That dilophosaurus or monolophosaurus sketch is badass!
I saw your recent statement about racial equality, so while watching this, I thought of an episode idea: do an episode highlighting the contributions of POC to paleontology. It would be educational & provide inspiration to young POC to consider careers in science.
Please do therizinosaurs I want to know more about these sloth clawed adorable weird guys
Great video like always! Could you do a video on the evolution of the beak? I’m curious how jaws and teeth changed to beaks, as well as the origin of beaks in cephalopods.
gotta include Dunkleosteus
They did an episode on how some species of birds had teeth but lost them in favor of a beak, maybe that would answer some of the questions you have? It was a good episode.
This!
I have been waiting for this video for so long...
Love these educational “bites”! Thanks for all your hard work
I and a colleague are starting a Explore The Collections - Do Not Dig - council to link Institutions and "open long-closed doors" inside these institutions to see what has been forgotten. Anything non -Archeological will be forwarded to the various departments or fields as they are discovered also. There is lost knowledge just behind a door.
Super fascinating! I knew literally nothing about Rauisuchians, so this is a mind-blown moment for me!
Some were huge.
Finally, a detailed video about rauisuchians...thank you, Eons :)
When I see how varied crocs were in the past I kind of feel cheated at realizing how comparatively homogeneously modern crocs lead their lives.
@Mullerornis I know, and it is particularly painful to think how close (relatively) we got to see them around.
Would be interesting to see a video on predatory whales you briefly mentioned in the video on Megalodon, maybe spotlight the big boi Basilosaurus? Interesting as always, love you guys vids
The thing is, predatory whales were not newcomers that outcompeted megalodon but old rivals of otodontid sharks that the sharks successfully coexisted with; this really needs to be addressed.
Could you do an episode breaking down the eras of time? I find it difficult to remember the order of eons and eras and all the nesting subsections and what happened in each one and...
Great video. Thanks!
Thanks fam!
One day I want to have a voice like this narrator
"Kallie, why are you making me say this?" lmao
Imagine time travel, I'd hate to go back there but I'd love to see life and all the extraordinary things we are yet to discover
Merch idea. A block of sticky notes, have it look like that cube sticker. Maybe on different sticky notes have different fossils? So then it could feel like you are unearthing new things as you use up the sticky notes? I would buy the hell outta that
is there a particular reason there aren't as many bipedal, upright ground animals today? esp big ones.
kangaroos, ostriches, humans. I guess mammals base shape is 4 legged.
the simplest answer would be weight distribution.
as all terrestrial vertebrates have evolved from creatures that crawled on four limbs, any evolution towards bipedal locomotion would logically start at lifting, what is in front of the hind limbs, off the ground. doing so requires a counter balance in form of an equally as massive tail.
dinosaurs could do that because of their light weight bone structure, with that it would have been easy to develop bigger hind legs to lift themselves off the ground and a longer tail to balance out the upper body, additionally the reptilian spine, swings side to side and is rather stiff in the up and down so holding the spine straight while affixed at only one axis wasn't too big a problem.
for a mammal to do that, would mean developing huge hind legs to lift the massive tail needed to balance out that upper body, additionally, due to the mammal spine bending up and down instead of left and right, the back muscles would be constantly fighting gravity to keep the tail and neck straight.
if you look for mammals to go bipedal, they first had to become climbers, the adaptations to a vertical lifestyle (mainly the long forelimbs) allowed mammals to assume an increasingly upright posture, first through knuckle walking, like ground sloths and great apes, followed by fully bipedal motion and having to become climbers first meant getting smaller at least for a while.
both groups are actually quite the opposite if you think about it, dinosaurs went bipedal by growing the hind limbs and tail, while shrinking the forelimbs, mammals did the opposite by growing the forelimbs, while shrinking the hind limbs and loosing the tail.
I wanna see a video on prey and predator relationships between sauropods and large theropods. (There's evidence of these interactions on EVERY continent)
Time to nerd out. I really enjoy this series.
Any week with a new Blake video is a good week!
It made me so excited to finally see Arizonasaurus getting the spotlight it deserves
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!
Awesome episode!
Top quality content as always guys!
2020: when human look alikes rules the earth.
I'd like to hear more about our ancestors and how scientists think they survived these changes. How did they continually adapt to each era? if that makes any sense.
"This is not the dinosaur you are looking for!"
Fascinating stuff. Puts things in perspective.
Hi I'm marnez, I have probably watched 90% of the videos on PBS Eons and I feel that the only thing you guys are missing is the rise of Arthropods.(see I gave you a name for a future show 🤗) I would LOVE to see what the split between these invertebrates and the thing more closely related to what turned into the first fish.. I'm sure it was some sort of worm or slug like thing based on the fact that almost ALL bug come from a childhood where they are basically maggot worms, I'm almost certain something like pikia ( I hope I spelled it right if not I hope you know the creature I'm thinking of ) could have come from something similar but just decided not to go through metamorphosis and eventually went from maggot to worm then worm with a fin like sail on its back towards the back of the body, then a million years later Pikia... Just speculation but I would LOVE to hear you guys opinions on this topic. Oh yeah shout out to Hank I know you don't know me but I feel like I know you I've been watching you guys for YEARS and I love what it is that you do. Please never stop I mean ofcourse unless better opportunity rolls your way. Be well PBS team 😃
That's the content 99% of us want: dinosaurs!!!
@Madalin Grama ok, 98% then
Madalin Grama I find it all interesting
Wow! I've never heard of these before
I'm just glad to see Steve again
thank you for the prideland recommendation!
??? I thought that there is low overlap between those two audiences, as far left politicised "science" mixes poorly with actual hard science.
@@useodyseeorbitchute9450 I can make some recommendations for reading if you like, it's almost impossible to have your opinion and have actually delved into politically engaged research in any meaningful way.
TL;DR
Your opinion; probably wrong.
In principle the word "politics" just means 'of or relating to power'. All science incorporates political factors in its execution and practice, these factors become more important but also more arbitrary the closer you get to people and the cognition and research of ideas, categories, and concepts (e.g. social behaviour, language, nation/states, qualia). Maybe this does not occur as much in physics, but even there we see factionalism that goes beyond science; for example, we have a rather arbitrary preference for base-10, other bases can reveal underlying relationships we can't easily see in base-10, this choice is political. All languages and cultures die or change, these words and all the data from the natural sciences combined will mean absolutely nothing to a future observer. Denying these political factors exist makes you worse at "hard" science and prevents you from understanding other areas of research you think are "easier". If you cannot admit that you even hold a bias, you'll hardly be able to keep it chained where it really matters, I propose that in not doing this, you are set to a political "status quo"-default of best-guessing, hypothesising, and data-mining without any controls. I'm not a leftist, I think left-right politics are becoming more and more irrelevant, oversimplified, and token. I use my own more anarchic sensibilities to propose questions you wouldn't think of and rely on observers like you (perhaps not as trolling) to offer the perspectives I cannot see and correct my work if they can see it. I believe that those who feel themselves to be the most objective are usually the least objective and most affected by bias in whatever they do as well as least capable of reaching their own potential. Einstein tells us there is no such thing as a view from nowhere in the physical world, no objective view. Therefore, context, perspective, and situation are the cornerstones of any good science or research. Without context you know nothing.
4:58 5 meters long but only 100kg? 🤔
Yeah, it's weird
Must have been thin
More episodes like this one, please!
Great Video!! Keep up the good work!!😁
Alright. Fill my brain with knowledge.
That's why reptile-man isn't a lie.
They evolved like the ancester of humans and now they look like us.
Well... archosaurs can't jump :D
Ironically it was the rauisuchian/crocodile line that survived the end of the Mesozoic Era and not the dinosaurs (aside from birds). A large reason for that was their LOW metabolism rate, which allowed them to go very long periods of time without eating -- very useful when the meteor impact destroyed the food chain.
It’s interesting how crocodiles or croc morphs were so diverse
Yeah, they occupied pretty much every aquatic or terrestrial niche, but these days they are all semiaquatic ambush predators.
Yeah, there were modern-style crocodiles, terrestrial crocodiles, bipedal crocodiles, herbivorous crocodiles and even filter-feeding whale crocodiles.
Less competition
@@eliburry-schnepp6012 I think it largely is a consequence of the K-Pg extinction up until that point croc line archosaurs were globally distributed occupying a large amount of the midsized to small herbivores, omnivores and the likes in addition to the aquatic ambush predators after the K-Pg extinction only the ambush predators (and a few land crocs but not sure if they directly correspond to the pre extinction analogs) really survived. I think their ability to go months to a year without eating due to their low metabolism is probably what allowed them to survive the extinction when nearly all other archosaurs (and mammals for that matter!)