Our Ancient Relative That Said 'No Thanks' To Land 

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Around the time that some of our fishapod relatives were crawling out of the water, others were turning around and diving right back in.
Thanks to Fabrizio De Rossi for the incredible reconstruction of Qikiqtania for this episode! / artoffabricious
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3 Eki 2022




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@beto1744 Yıl önce
Those fish were smart to go back into the water just look at their cousins now having to work 8 hours a day and dealing with things like depression
@TheKlaun9 Yıl önce
I work longer (no depression though), but I had fish for dinner. I guess I won that ancient bet of land vs water then?
@alexv3357 Yıl önce
Yeah but fish work 24 hours a day while pursued by sharks
@Pitbull64057 Yıl önce
There's probably a chance fish experience depression and psychotic synptoms just like us. Y'never know
@xonx209 Yıl önce
The land cousins get to eat the smart fish that returned to water. Rarely the other way around.
@lancewedor5306 Yıl önce
no one said you must endure having to work 8 whole hours a day. If you do that, it must be what you want. or you would find something else to do.
@Rubrickety Yıl önce
I’m afraid I won’t be satisfied until paleontologists find “true” fishopods, animals whose feet are actual fish.
@Coffee-hj5di Yıl önce
*me, without looking up from my book*: Mermaid
@@Coffee-hj5di Best I can do is a monkey stitched to a fish.
@Alex-fv2qs Yıl önce
Why would we need paleontologists when marine biologists have observed live ones, I saw it on an Animal Planet documentary
@InfinityOrNone Yıl önce
Well, if you're willing to allow for cladistics and some tinkering, I can give you one for 5 axolotls and and some decent liquor.
I was starting to wonder if I was the only one with that image in my head...
@italucenaz Yıl önce
I had no idea Tiktaalik was so huge, I always imagined them at the size of a giant salamander at most, but I wasn't expecting an alligator sized fish
@Isis-wm4po 24 gün önce
A favorite professor, in undergraduate studies, was the one who taught me this. I'm impressed with the things I never knew, and when learning about this, I continually had questions. Being to his office hours so often allowed me to notice a recent magazine cover. I thought, who knew marine reptiles likely gave birth? It makes sense. My professor allowed me to read the article, only to find he was the one to discover the fact. He was as humble as Tiktaalik. How cool would it be to be the first to be able to do a pushup? To poke your head out of water? My professor made comparative anatomy the most fascinating subject of all
@italucenaz 24 gün önce
@@Isis-wm4po he seems like a brilliant professor, I hope I can teach like him
@Indoraptor_2012 10 gün önce
What?!? It was that big?!?!
@italucenaz 10 gün önce
@@Indoraptor_2012 a medium alligator, not a giant one, but still
@Indoraptor_2012 3 gün önce
Still quite a bit, I thought it was smaller
@benmathews2762 Yıl önce
Qikiqtania wakei had the right idea. Their lineage only needed to take a couple of steps onto land before realizing that this path would eventually lead to the invention of taxes. I'm proud of them and I envy them.
@TheDarrellimpey Yıl önce
"Many were increasingly of the opinion that they’d all made a big mistake in coming down from the trees in the first place. And some said that even the trees had been a bad move, and that no one should ever have left the oceans." Douglas Adams
“you may be interested to know that I am singlehandedly responsible for the evolved shape of the animal you came to know in later centuries as a giraffe.” -Ford Prefect
According to this logic, if we didn't, mermaids would be real and humans would be myths in a alternative timeline
Douglas Adams was a poet, a scientist and a prophet
@lancewedor5306 Yıl önce
@@matheussanthiago9685 and both silly and weird, my kind of guy!
@swordfish1929 Yıl önce
This was my immediate thought watching this video, followed up by thinking about fossilised towels
The idea that evolution is just winging its entire job weirdly gives me hope for my future.
It really shouldn't. Do you want your future to look like a platypus?
@@incanusolorin2607 Venomous spurs and the ability to sense magnetic fields? Kind of sounds cool.
Being the best isn't necessary from an evolutionary standpoint; you just have to survive long enough to pass your genes on. I think this is also how bureaucracy works with forms.
@bbirda1287 Yıl önce
@@patrickmccurry1563 Magneto and Poison Ivy's baby?
@@incanusolorin2607 yes
@Mentyr Yıl önce
From a historian's point of view, this is a really cool illustration of fallacy of sorts that's really easy to fall into: In fields like national history or history of technology (and many others, I'm sure), one is tempted to only look at the path that worked, which makes it feel almost preordained: "This modern nation state was the direct and single logical continuation of this medieval rulership". "This idea/technology is based on this one and that one, and its advent was basically inevitable". No, it wasn't.
@swimdownx6365 Yıl önce
The Devonian had most amounts of carbon dioxide
@moreli2001 Yıl önce
Same here! I'm doing my history major and this is a textbook example of how people tend to understand history as a line of logical events and with a purpose, but in reality, human history and natural history are as random as they can be. Of course everything has causes and consequences, but there is not really a future we are heading to, or a recipe that makes certain things happen or not.
@iankrasnow5383 Yıl önce
""This idea/technology is based on this one and that one, and its advent was basically inevitable. No, it wasn't." ACKTUALLLLY, that doesn't mean it wasn't inevitable, just that it doesn't logically follow from the premise. It could be that no other path to land based megafauna was as likely, and when it comes to evolution, the simplest change from an existing organism that can provide an immediate benefit is usually the one that occurs, because simple changes are more likely. You can say that the modern tetrapod was the logical conclusion of evolution, but only after you rule out all other possibilities. Now regarding the recorded history of humans, it sounds like this line of thought is meant to be a direct challenge to historical materialism. Just an interesting thought, I wonder if you agree.
@sugark7774 Yıl önce
@toAdmiller Yıl önce
If you've never watched the series "Connections" with James Burke, you would LOVE it...
@jatc11yey Yıl önce
I love how she said 'who we had to thank .. or blame.. for the transition to land', knowing full well that tiktaalik meme 😅
What meme?
@@emeraldcrusade5016 Apparently, there are jokes everywhere about people hating tiktaalik for being responsible for the crappy world we have now.
@SuperSavajin Yıl önce
9:46 definitely lol
@helldronez Yıl önce
@@emeraldcrusade5016 meme about blaming them cause they evolve to us, then get to work 8 hours deal with depression etc
@ivybennett2274 7 aylar önce
​@@emeraldcrusade5016 some stupid fish crawled into land and now hundreds of millions of years later I'm sitting here with depression and paying taxes
@Renisanxious Yıl önce
I read an entire book about tiktaalik and no one EVER mentioned how big it was. I have been thinking this entire time that this creature was a cute little salamander maybe a foot long maybe two feet long, but almost 9 feet long???
@MossyMozart Yıl önce
@Ren Short - Yes, but that's measured in fishy-feet.
But what size feet?
@eljanrimsa5843 Yıl önce
You can get a sense of how old it is from the fact that back then people measured in feet.
So...almost 3 meters
@Coffee-hj5di Yıl önce
Other fishes: how was land? Qikiqtania’s ancestors: 7.8/10 too much land
@majimadavis3602 Yıl önce
@p.e.d6541 Yıl önce
I understood that reference
I always kinda though tiktaalik looked like it could never actually kill anything with it's dopey looking head and jaws. Rather, the prey realize it's just been caught by the gooberiest looking salamander-fish, be like 'awh seriously, how's this happened' and just loose the will to live in a slimy embrace.
@pappanalab Yıl önce
✨Amazing✨ Definitely what happened (at least in my heart)😌
@captscarlet8793 Yıl önce
yeah, but, competition is relative ;) prey get more dope to thwart more badass predators, so to paraphrase forest gump, "dopey is as dopey kills" imagine us when we've been fighting and avoiding xenomorphs for 3 or 4 million years. If that ever happened I like to imagine our descendants would look at our fastest gunslinger or martial artist as slow like a sloth.
Is it venomous? The bite seemed to immobilize it... No, that's just shame...
I am pretty sure that Tiktaalik lived in very muddy and dark waters and was probably an ambush predator that could do with a quick burst of speed to survive, like some modern crocks or frogfish. Cool sleek aerodynamic and energetic looks are not needed for that lifestyle.
@killerbunny7206 Yıl önce
I mean if you don't have any salamanders to compete with, being a fierce fishapod is quite scary.
@Feliciano151 Yıl önce
Can't help feeling like the ones who went back into the water ended up making the smarter decision in the long run - the really, REALLY long run!
@malavoy1 Yıl önce
Depends on whether they're still swimming, or breaded and deep fried.
@eljanrimsa5843 Yıl önce
Right now it looks like the squids and the jellyfish will inherit the ocean because we are killing too many of our cousins
@sasha_ytube 7 aylar önce
in the long swim
@rockingredpoppy9119 7 aylar önce
@@malavoy1 😂
@leeleaman8057 Yıl önce
**Qikiqtania wakei crawling out of the sea** **Sees 2.7m Tiktaalik** ‘Ight imma head out
@swimdownx6365 Yıl önce
Lots of space something would fill it . Life just works that way
@MrTaxiRob Yıl önce
"too late, the idiots are already here" -Qikiqtania
@gwyn. Yıl önce
Qikiqtania wakei: Lemme see what's so hyped about this "Land" thing... *Tiktaalik raving on land Qikiqtania wakei: Nope. *Sigh "Kids these days..."
@solsystem1342 Yıl önce
@@swimdownx6365 I mean, there were other things living on land but, it took 3.5 billion years for life to become multicellular. It doesn't seem unreasonable that there is a development that would be advantageous and possible but, just hasn't happened in the half a billion years multicellular life has.
@unvergebeneid Yıl önce
Well, I've always seen my life as kind of a landfish-out-of-water story.
@MarcelinoDeseo Yıl önce
Dolphins and whales too kinda disagree with that story 😅
Land shark
This and the "Are We all just fish?" video almost make you realize that (to paraphrase Obi-Wan Kenobi) from a certain point of view, we're all fish anyway
@TheKlaun9 Yıl önce
Some time ago, I was active in a fiction writing community. It's shocking how many well read individuals thought evolution, technology etc worked like a computer game with hardcoded, linear options to choose from and improve your species. Kind of wish this video came out for referencing before I quit that thing
So, kinda like spore?
@mallninja9805 Yıl önce
I'm a software engineer. I was just thinking how code evolves a lot like animals, IE we take what's already there and just kind of bolt the new features onto the existing mess. 🤣
@MrTaxiRob Yıl önce
@@mallninja9805 DNA still contains at least some of the old code though
@TheKlaun9 Yıl önce
@@mallninja9805 I guess it's the same thing if you believe that life also has an intelligent designer with a specific purpose in mind
@@MrTaxiRob Exactly. That’s why it’s “bolting new code onto the existing mess.” All the old code is still there.
@epicgamersaurus Yıl önce
I had no idea Tiktaalik was such a recent discovery. It was something that was in a lot of the books I read as a kid, probably only a few years after it was discovered. Really shows how important it was.
@slwrabbits Yıl önce
I remember one of my biology professors brought it up during a class, not very long after it was discovered. So cool and exciting.
@@slwrabbits how long ago would that be?
@slwrabbits Yıl önce
@@heinzarniaung2915 probably around 2009? could be pretty far off, I have a terrible sense of time. of course, this is the same class I accidentally slept through ...
@TheOmNomGirl Yıl önce
Could the reason Qikiqtania turned around been because a new environmental niche opened up? Like legs were developed while they were a lesser predator and constrained to hunting in shallow water, but then the larger predator died out allowing Qikiqtania to take advantage of the more bountiful open waters
@nckojita Yıl önce
this is probably exactly what happened, or alternatively the niche they were trying to fill was taken by a different species and they could no longer compete with them and had to ‘devolve’ so to speak
@saulnavarro4730 Yıl önce
He went back because he didn't want his descendants to pay taxes
@@saulnavarro4730 Don't you mean descendents?
You might as well argue that Q pushed T onto land and took over its niche. Legs were probably tastier than fins.🍗
Or maybe the shallow environment had flooded and turned into more open waters over time
@brfisher1123 Yıl önce
I think with the lungfish being our closest extant (living) non-tetrapod ("fish") relatives they definitely deserve a PBS Eons video of their own! The coelacanths are also fascinating fish and also deserve a PBS Eons video, but they split off from the tetrapods *BEFORE* the lungfish did.
@jaydonbooth4042 Yıl önce
Wow, I never knew that tiktaalic was so big. Just thought it was like 40-50cm or something like that.
You’re thinking of Icthyostega
@slwrabbits Yıl önce
It's really too bad it's so difficult to establish a sense of scale in paleoart. I actually thought it was smaller yet, like maybe 20-30 cm.
@k.umquat8604 Yıl önce
@@juanjoyaborja.3054 I used to think Tiktalik was 60-70 cm in length and Ichthyostega was a full meter long
@JubioHDX 7 aylar önce
@@juanjoyaborja.3054 no, most depictions just really do a terrible job of depicting the scale (probably because nothing we know of now is like how it was back then, but still)
@RPSchonherr Yıl önce
These fish lived in a tidal river delta. They would get trapped in tide pools that shrank over time before the tide came back, so they had to go over the muddy land to get back into water. The ones who could do this survived.
@p0lydaedalus Yıl önce
I think most depictions of Tiktaalik don't do it's size justice. I've always had the impression that it was an arms length long.
@marginbuu212 Yıl önce
Weren't there already giant insects inhabiting dry land at the time? I would have noped out too.
What's disturbing about trying to out-crawl a spider ancestor the size of a small continent?
Those came later. Checking around, it doesn't look like there were even any flying insects then. But there were giant so called sea scorpions. So the water wasn't a great place either.
@vanillajack5925 9 aylar önce
​@@patrickmccurry1563I think insects were already there, the first animals colonized land around 400-500 million years ago.
@JubioHDX 7 aylar önce
@@vanillajack5925 the giant ones that the og comment was referencing still werent, though. the carboniferous wasnt for 20+ million more years after when the Q Wakei fossil has been dated to
@sharondornhoff7563 4 aylar önce
Insects were presumably what these guys initially came out of the water to hunt.
@amelade Yıl önce
this video gives me a similar feeling to watching scishow in 2016-17. i really enjoy the energy the hosts bring to the episodes, and i enjoy the work Eons has done to set a specific familiar tone
It would be a bit different for the channel, but I'd love to hear more about how the researchers interact with the native communities to get the permission or support to their research in the field, and about search campaigns in general.
@JDeO1997 Yıl önce
_Qukiqtania crawls out of the water and sees land arthropods. Slowly backs up into the water_
@WilfredOnalik Yıl önce
Wow! I'm glad you guys came up north for this exact reseach I didn't know was in my home territory of Nunavut. We have a lot of space here and not many people with the proper research capabilities to trace fossils and artifacts as much around here in the north. It was exciting to watch and learn from you guys! Big thanks PBS Eons!!
5:29 one of the most misunderstood parts of evolution so enthusiastically explained! 7:40 even more to the point!
"This fish crawls out of the ocean; now I have to pay rent and taxes" Qikiqtania: "not my fault."
@taylorm.8545 8 aylar önce
I had no idea Tiktaalik was so big! 😱 I always pictured it as big as like an iguana
This is the only channel where I regularly rewind to double, sometimes tripple, check if I heard things right and pay really close attention. I love this stuff. If I had somehing like this 15 yrs earlier in my life I'd be somewhere else right now doing something completely differrent
@flutterbree Yıl önce
Tiktaalik is one of my all-time fave Old Bois, and I love learning more about them
@hhiippiittyy Yıl önce
Tiktaalik is a Inuit word for freshwater fish that live in shallow waters.
YEEESSS IM SO HAPPY YOU MADE A VIDEO ON QIKIQTANIA!!!!!!!!! SUCH a fascinating fish but it doesn't seem to see all that well known :( i really hope you make more videos about the fish - tetrapod transition!!!
@teds9896 Yıl önce
We could likely guess this would happen from the numerous terrestrial vertebrates that have returned to the water from their ancestors lived on land. That there's irony too that some like amphibians have to return to the water to reproduce, while others, ex: penguins, sea turtles, seals, sea lions, etc. have to return to the land to reproduce.
Awesome. It is true that in school we are usually given that idea of evolutionary progression from one form to the next, but it is really just change based on the environment and competition, isolation, etc. and whatever is currently available.
@jeremydiaz2682 Yıl önce
presenter has the coolest vibe as they explain; 10/10
@finnhd915 Yıl önce
I just watched your inner fish in my anthropology class. It’s a documentary about Neil shubin and his trams expedition in the Arctic and their discovery of tiktaalik
honestly it makes a lot of sense for something bearing that low-belly body plan to have an equally easy time developing in either direction without risking too much, especially that early on.
@dinohall2595 Yıl önce
This is a great correction of the common misconception that evolution is a linear process while also being a cool paleontological discovery in its own right. Adding Qikiqtania to my personal dictionary.
@animalpeeps Yıl önce
It's so cool thinking about how branchy evolution can be. Seeing this as yet another example just makes me appreciate how crazy long the Earth is, and the amount of time life has been around, constantly evolving. And creatures like these were all just living their lives, for all this time.
@KarlBunker Yıl önce
I'm with these guys. I want to evolve back to water-dwelling too. Dry land sucks.
@AriManPad8gi Yıl önce
Loved the presentation, very open minded analysis and truth. Thanks for the land acknowledgement too. I very much appreciated the way evolution was described, as a non-linear process. Decolonising natural history and other domains is important. Wliwni thank you 💜💚
@josephd.5524 Yıl önce
Any plans on doing a gecko special? I've been becoming a bit obsessed with them of late and it turns out they are an extremely complex branch on the reptile tree that they kind of have all to themselves.
@Kgamer3141 Yıl önce
Shout-out to progressive metal guitarist Charlie Griffiths and his album Tiktaalika for getting me to read about this guy earlier this year.
@Langkowski 10 aylar önce
Why did it "return" to deeper waters? I can imagine two reasons: There was a minor extinction that killed off some major predators, making it safer to live in this niche, or open freshwater areas were simply not that explored by fishes yet. The other reason is that the larger predators were so successful as shallow water hunters thanks to their fins that deeper waters was a safer place to live than shallow water.
@DaveTexas Yıl önce
Really fantastic video! I love learning about these things, plus y’all make it so much fun to watch!
@trekpac2 Yıl önce
This was such an interesting look at the early evolution of tetrapods, and of the complexity and diversity of evolution. I’m sure the thought that 98% of species have gone extinct already is a big underestimate.
@noahhogan9308 Yıl önce
I LOVE fishapods like Tiktaalik & Qikiqtania, and Neil Shubin, who I ACTUALLY heard speak at Ohio University!!! 😍😊
We think of these fish as living in shallow, murky waters. As I watched a video on rivers drying up, the pretty, narrow, ray-finned fish seemed to be the ones that were dead, while the ones that could still flop on their ventrals were surviving better. It makes sense that this proto-tetrapod body shape would also do well in seasonal bodies of water, much like lungfish and catfish do today.
What if the two populations were originally together and were separated by the slow rise of a land barrier between them that forced one population out to sea while the other one was isolated in a lake or pond of sorts and the result is that the group that was in the lake was exposed to slowly reducing water content or size of the lake and slowly over time they eventually become amphibians and progress from there. Just an interesting idea that makes sense to me.
Keep up the great work, I love natural history and this show!
@charlesjmouse Yıl önce
A fascinating subject and potentially an extremely complex one: Yes, while the 'fishapods' we know are considered our ancestors (this may be true) it's just as likely they are illustrative cousins only. There are pretty 'advanced' seeming tetrapod tracks older than any 'fishapod' we have found but no seeming tetrapod to match them. So what is going on..? a) Our 'fishapods' are our ancestors but these mysterious tetrapods are an earlier venture on to land that didn't work out for some reason. If so having gotten to an 'advanced' state what finished them off and why? Why not 'us' later on? What changed? Chance..? b) The mysterious tetrapods are our ancestors and the 'fishapods' were a convergent migration on to land that went nowhere. If multiple vertebrate lineages moved on to land that would be a surprise and require something of a rethink. c) -Land animals as we know them radiated from multiple sojourns on to land- Not true, all modern tetrapods are known to be one group. But has that always been true? If not true, when did out 'distant leggy cousins' die out and why? Are we aware of any potential candidates? d) We've got our dates wrong and these mysterious tetrapod tracks aren't that mysterious at all. A few million years younger than the likes of Tiktaalik there would be no mystery. ...all these questions are unanswered besides the subject of early tetrapod evolution being an utterly fascinating one. Whatever your branch of science it's always a journey of discovery and there's no sign of us running out of even fundamental things to discover any time soon. Here's a thought: Apart from five digits not being the norm early on the tetrapod limb as we know it comes in only one version. Either there really has only been one venture on to land by vertebrates (so what's going on?) or the evolutionary pressures that have resulted in 'our' limbs very strongly constrain the design indeed, but not necessarily the number of digits - if so, why? It's certainly not obvious.
@pappanalab Yıl önce
As land fish aren’t we kinda reverse mermaids
@Alusnovalotus Yıl önce
Yup. Why do you think king triton was so pissed at Ariel falling for a mere deserter???
@iankrasnow5383 Yıl önce
Since whales are sea mammals, does that make them mermaids?
@Apex_Yonko Yıl önce
@@iankrasnow5383 no
@Alex-fv2qs Yıl önce
@@iankrasnow5383 manatees arr the true mermaids
No lmao. Don’t try and simplify science with laymen terms like “reverse mermaids.” We’re just fish that adapted to life on land, that’s it.
Wasn't expecting my existence as a land fish to be validated today but I'm here for it.
@FloTaishou Yıl önce
These fins were made for walkin' And that's just what they did One of these days these fins were gonna walk all over earth
Couldn't get that song out of my head!
@andyjay729 Yıl önce
For the second line, you should've said something like, "And that is just the trurth".
That fish was like "reject humanity, return to fish"
@davidt3563 Yıl önce
Could you imagine seeing Arthropods in the water and being like "Yea, I'll just go back to the water and take my chances!"
@JoRiver11 Yıl önce
I guess if it was in a area that was prone to shifting conditions, like droughts and flooding, it would be a huge advantage to be able to move from shrinking pools and not be stuck without water, or find newly flooded areas with lots of resources.
@daverohrich8518 Yıl önce
Gotta say, I was pretty critical of Michelle when she first started hosting, but she is knocking it out of the park now. Great video, and keep up the great work
@LeftOfBori Yıl önce
I had the amazing opportunity to see the original mold of Tiktaalik in person because Ted Daeschler worked in the same museum my now fiancé did. He was so cool
@fraan9002 Yıl önce
The intelligent one
@entropy8634 Yıl önce
Well no. They extinct now
@@entropy8634 Exactly.
@@entropy8634 extinct doesn't equal dumb.
@Crow0567 Yıl önce
I'm reminded of a tiktaalik meme.... "If you see a Horrid Beast evolving, *PUSH IT BACK IN*"
I think the fact that we share fish grandpas and grandmas as ancestors is cool as puck.
@bookworm3005 Yıl önce
Idk why, but it just cracks me up thinking about an ancient fishopod that evolved over (possibly millions of) years to get onto land, then just NOPED right back into the water
@ianlogan0741 Yıl önce
I guess around the time tiktaalik was alive it was far too hot and still barren for it and it's descendants to really get on to land yes there were plants at the time but they were very small and not nutrient-dense and not really many meaty arthropods as well
Funny thing is, that legs actually didn't evolve for walking. First legs were quite useless for walking. They were new adaptation for aquatic life (there are several theories for their original function). They evolve in to walking legs probably in Carboniferous (or maybe mid Devonian, because from this period there are several ichnofossils which were made probably by a partially terestrial tetrapods. But every known late Devonian tetrapod is fully aquatic animal not capable of walking on land, which is another puzzle).
@Noodlezz95 Yıl önce
this is so interesting. are there any fishes that have that kind of limb structures nowadays? I'm not referring to sea mammals, I'm more thinking of some fish that evolved from the ones that didn't quite go on land and kept the weird bone formations in their fins
@Ozraptor4 Yıl önce
Pretty much like the fish version of tree-kangaroo evolution. Bunch of ground-dwelling wallabies develop climbing adaptations and become tree-kangaroos, but one member (the dingiso of New Guinea) turns around and reverts to a ground-dwelling lifestyle while retaining the anatomy of its arboreal ancestors.
@rearct8844 Aylar önce
I think this is the first time I've seen an Eons end acknowledgement getting to say that the fossils were collected with the permission and support of the relevant indigenous people. It's really nice to see that practices in paleontology are changing for the better.
I can’t believe Qikitania was hidden and unknown until 2020! All because Tiktaalik became the superstar of the paleontology world.
what if it was more of based on mating habits. perhaps the development for land was to lay eggs in safer shallows or in lake inland, however the reverting to fins maybe a group that found waterways to swim upstream like salmon and thus need the fins more than the ability to go on land. depending on how widespread the species was different areas could have work towards where it was safest to lay eggs and the route to get there.
@n8sot Yıl önce
This is very interesting. And can be quite confusing!!! Thank you Michelle for the great explanations!!! Also, Michelle is looking AWESOME!!!!!! Thank you!!!
@markykid8760 Yıl önce
If watching every paleontology video on TRvid has taught me anything, it's that the direct relative of *anything* was a rare subgroup which probably won't be captured in fossils.
@laureno4410 Yıl önce
Not a terrible choice, all things considered 🐟 💨 🌊 🏝
@jondewart5661 10 aylar önce
The thing that seems to be forgotten, is that the moon was so much closer. Thus tides were so much greater. So it wasnt so much that fish left the seas rather the seas stranded fish on land or in this case, forced land animals back into the sea.
@nevernever9183 Yıl önce
I think the whole thing has to do with how low the oxygenation was in the waters these fishopods swam in. In the carboniferous, swamps and peat bogs abounded. Fish developed lungs to survive in acidic, anoxic waters. Their eyes evolved the ability to see through air and migrated to the top of their head, as the water was too murky for them to be useful in the water. Limb like fins helped to support the weight of the fish in shallow water, because they would suffocate without that support (until stronger ribs evolved). The advantage could also have been largely reproductive. Being able to access landlocked pools could provide a safe environment for eggs. Maybe the pelvic fins developed partly to dig in the mud, either creating channels between shallow pools or for burying eggs. But as these fish became more numerous, they spread to different environments, and in places where the water had more oxygen swimming was still a much better strategy for hunting.
@josequiles7430 10 aylar önce
Fish already had lungs. It's just that most of them turned into swim bladders
@Mixtrelle Yıl önce
underwater average fish: hey Qikiqtania you said you're going to the land Qikiqtania: no, the sun is a deadly lazer
@grumpyginger99 9 aylar önce
Qikitania was kind of trend setter when you think about it. With the various marine reptile and mammals all returning to the open ocean and having to do some serious rejiggering to adapt but still showing tell tale signs of their terrestrial ancestry
Tiktaalik to Ken Hamm: These fins were made for walking, and that's just what they'll do. These fins are going to walk all over you.
@ryanmckenna2047 Yıl önce
You guys are great!
@icewink7100 Yıl önce
Wow! I have been wondering about what was the first animal to re-evolve back into the water, and y'all answered my question! Next question, have any invertebrates re-evolved back into being aquatic?
@cerberaodollam Yıl önce
Hmmm water beetles?
@sharondornhoff7563 4 aylar önce
The larvae of several insect groups such as dragonflies and mosquitoes are aquatic, although they don't stay that way.
@leeleaman8057 Yıl önce
Love the episode! Thanks Eons :)
These fins are made for walking, and that's just what they're gonna do. One of these days these fins are gonna walk all over you!
Tiktaalik: Let's check out this land thing Qikoqtania: RETURN TO FISH
"Piscapods" sounds better to me than "Fishapods"! Excellent video.
Ostriches can probably feel a kinship bond with the way of thinking of these little fellas.
@honeybhingful Yıl önce
Now I'm curious as to what the Qikiqtania's recent living descendants look like, if there are any fish today that can be traced to have ancestral tetrapod limbs
@brendap13 Yıl önce
Me too!
@brendap13 Yıl önce
I just looked it up - there was only one specimen of that one species that makes up that genus ever found (so far) - no descendants found in the fossil record or living, sadly.
@DarthFetid Yıl önce
the australian lungfish is rather interesting to look into
The animal's name comes from the Innuit name of the Canadian place where it was found, and David Wake, a late scientist who inspired many others to get into this field.
@keith6706 Yıl önce
"Inuit". One "n". And it's named after the Qikiqtani Region, which makes up the eastern and northernmost parts of the Arctic Archipelago.
@@keith6706 Qikiqtani is a part of Nunavut, Canada. Next time, you put the knowledge contribution for everyone; evidently you are more accurate.
@keith6706 Yıl önce
@@MariaMartinez-researcher I _live_ in Nunavut. The other two regions in the territory are the Kivalliq and the Kitikmeot.
@@keith6706 My point exactly. As the video didn't tell the beastie's name origin, you could be sharing your unique knowledge about that Canadian region instead of correcting me. Post everything you know about your hometown, put the fish in geographical context.
@Dragrath1 Yıl önce
One important detail we tend to forget is that walking fins have been and continue to be used among fish ambush predators in dark or murky habitats. In effect they walk along the floor of the lake river bottom or seafloor in order to sneak up on prey that has adapted to detect the minute vibrations of swimming. This was probably an important intermediary in the evolution of legs because it doesn't require the animal to have the ability to bear its full weight thanks to still living in the water and appears to continue to be and have been a successful enough adaptation those this kind of murky river environment that it has evolved independently many times among different lineages of fish. Most if not all of these early tetrapodomorhs appear to have lived primarily if not entirely within the waters of the Devonian and molecular clock estimates seem to suggest that leaving the water was a late adaptation occurring around the time of the end Devonian extinctions and the onset of the late Paleozoic ice age. Though molecular clock estimates are notoriously hard to calibrate on their own there is fossil evidence to support this perspective and it is importantly the only explanation which can explain the order of physiological adaptations appearing in the fossil record. TDLR Tiktaalik and its relatives rarely if ever walked on land instead they likely show adaptations to predatory niches within the great Devonian river systems that formed around Earth's first true expansive forests. They simply all lack the robust muscle attachments needed to bear weight on land with their limbs which combined with molecular clock estimate suggests where the duplication and development of muscle and muscles attachment associated genes in extant tetrapods only appears to have occurred once in our lineages evolution as part of a polypoidal hybridization event. Note that the molecular clock estimates also coincide with a time of falling sea levels as vast ice sheets began to build across Gondwana setting the Earth into the vast series of glacial and interglacial cycles which drove evolution of the biosphere for the next hundred million years. Given that most other major land to sea transitions among life appear to coincide with major sea level changes this is by far the most likely hypothesis at least in logical arguments. After all you need to crawl to learn to walk to walk to learn to run evolution does not create features de novo it builds on what already exists based on what is more successful and reproducing. Without some ecological factor to drive them out of the water the model where they come out of the water and then back in doesn't hold up under Occam's razor and Bayesian inference(one unlikely event x times another unlikely event y is probably not more likely than x alone. I'll trust the model that actually has growing bodies of evidence to support it instead as limbs are necessary but not sufficient to walking on land and the duplication of muscle and muscles attachment associated genes only appears to have occurred once in our lineages evolution as part of a polypoidal hybridization event in this picture naturally they couldn't walk on land until they were forced to and the evolutionary incentive for that change was associated with dropping sea level changes. Until a model can present a scientifically plausible explanation for how Tiktaalik and its kin could support their weight out of the water I can't even consider the standard explanation scientific.
@raze_ Yıl önce
Man if i would have known life was gonna be like this i would have stayed in the primordial ooze.
@IronKnuckleKO Yıl önce
“No thanks, I choose life.” - Sid
@luutas 9 aylar önce
This video was incredible. Thanks!
@miezekatze211 Yıl önce
When will the podcast continue? I love it and can't wait!!
@brendap13 Yıl önce
I HIGHLY recommend “Why Fish Don’t Exist” by Lulu Miller for a captivating deep dive into this topic.
@ccooper8785 Yıl önce
I blame everything not on our ancestors who came down from the trees but on their ancestors who left the nice, warm, muddy swamp... What were they thinking? What could be better than a basic existence in a nice, warm, muddy swamp where death arrives unseen? (muddy swamp remember.)
@Gorabora Yıl önce
Ancient whales : "yeah those guys were onto something"
@Domdrok Yıl önce
I didn't realize how big tiktaalik was.
@fubberpish3614 Yıl önce
Same here! I thought it would be much smaller, like in the range of 60-100cm
This is truly interesting to think that even are out walking fish ancestors didn't want to go on land,lmao
@JohnJohansen2 Yıl önce
Very interesting and extremely well presented! 🥰
@Mini_Squatch 5 aylar önce
I would argue that the transition from sea to land was inevitable, simply because life will expand to fill anywhere it can, regardless of how stable that ecosystem may be. But life will also happily stay exceedingly simple because thats stable. Sea sponges and jellyfish are proof of "it it ain't broke, don't fix it"