From Dinosaurs to Birds: The Remarkable Evolutionary Journey Unveiled | Dinosaur Documentary
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- Опубліковано 11 лип 2024
- Dinosaurs are not extinct. Although the mighty Tyrannosaurus won't make an appearance on your morning commute to work, you won't see a pack of troodontids leap over your back garden fence, and the vast herds of hadrosaurs are a thing of the past - dinosaurs still walk among us in the form of birds. All birds are descended from theropod dinosaurs.
This is not just a theory but a scientifically proven fact. Birds are not related to dinosaurs - they are dinosaurs. Avian dinosaurs. With the End Cretaceous, or KPg extinction, all of the non avian dinosaurs perished and became extinct, leaving behind a world of relatively small creatures. Among them were the feathered ancestors of the theropods, some of which fluttered about from branch to branch, some of which stalked the forests on long, earthbound legs. If you look outside your window right now, regardless of where you are in the world, you'll probably see a bird. Depending on your location, this could be anything from a chaffinch to a cardinal, a gull to a gnatchatcher, a buzzard to a bird-of-paradise.
Over ten thousand species exist today, and they compose, arguably, our most beautiful animals - brightly coloured plumages and beautiful songs have inspired naturalists, birdwatchers, poets, authors, musicians and painters over the course of human history, but it is only relatively recent science that places these amazing creatures in the same family tree as the now extinct, non avian theropod dinosaurs.
0:00 Introduction
3:17 Evidence for the Evolution of Birds
14:08 Examples of Prehistoric Birds
30:17 Modern Birds
36:01 Outro
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I've fallen asleep twice now before the end of the video. And that's not a complaint. This is easily one of the most relaxing channels on UA-cam.
0:23 this part woke me up
must watch at 1.5X it sound like he is talking normally
He has a very soothing relaxing voice
@@bassbustingman couldnt even take 1.25
@@bassbustingmanthank you! 😅
"Birds aren't related to dinosaurs, they ARE dinosaurs" Thank you. Thank you for starting with this. Too many videos take too long to get to this fact when mentioning they've descended from dinosaurs. People misinterpret that phrase as meaning they have descended PAST the point of being a dinosaur, when they have not.
strictly speaking, these categorizations are all artificial intellectual devices and constructs. they have no meanings beyond how humans like to categorized things. if we wish to say birds are not dinosaurs since the time they have feathers, we can do that and it will be equally valid just as if we wish to classified humans are not animals but somewhat superior godlike beings, we can do that as well. they are all valid because these really have no meanings beyond what we humans like to define them as.
As an example, cetaceans are mammals despite being shaped like fish.
@@JAM-ic8kv Yup, it's even worse though because birds are shaped like a very typical theropod too. So even the shape is like a dinosaur, which makes it all the more annoying when people make it sound like they're not dinosaurs.
@Cat Poke modern birds do not look at bit like the earliest dinosaurs. Heck, even many of the none avian dinosaurs do not look a bit like the earliest dinisarsus. There are over a hundred million years between the time dinosaurs' first evolved in triassiac and the time of like say a T Rex theropod. A T Rex would be closer to modern-day humans in the time line than it is to their earliest ancestors and would look very different than the first dinosaurs who branch off of the archosaur.
To fly, there needs to be major changes to one's body just like to swim, there needs to be major changes to one's body as well. This is why creteceans look so drastically different from their fur ancestors. Major body changes is necessary to adapt to life in the sea as it is to adapt to life in the sky. The none flying birds like emu and ostrich are much more primitive looking and dinosaurs like.
@@IamAWESOME3980 Theropods weren't the earliest dinosaurs, so I don't see your point. Birds look like regular theropods, that's all I was saying. Although I will say the earliest dinosaurs looked a lot like theropods, so birds aren't too insanely far from them either. They certainly look more like them than whales look like mammals, haha! And yes, a lot of dinosaurs looked nothing like the first dinosaurs. Pretty much only bipedal carnivores and omnivores looked like them.
Man I’ve been waiting for someone to make this exact video for a while. Great job!
I live only 50 km away from the place where the first Archaeopteryx was found. :)
Nice
Nice! I'd be outside every day I had off work trying to find fossils. 🍻
Goddamn this narrator's voice is impossible to resist. I fall asleep within minutes. I give up.
Watch at 1.25 speed and the computer generated voice sounds more natural.
Man I love Dinosaurs...
especially roasted or grilled
@@Alexsedlexsame here!
They at the pet shops🕊️ all across America and at farms🐔 😊
First video I've seen that mentions the Argentavis! I love it. Keep up the great work, I really enjoy your videos!
I'm so excited! I'm off today and you guys put out a new video! Thank you, I love your content!!
It's tragic how little views this amazing channel gets!
One more viewer and subscriber!!!😊
I see lots of dinosaurs frequenting my yard. They are fascinating to observe. Strange critters indeed.
Only those in the clade Theropod(3 toes) can be classified as modern dinosaurs. Calling all birds modern dinosaurs is a gross overstatement.
@@andrewgonzales6527 which birds are not theropods?
@@xalspaero any bird that doesn’t have 3 toes and claws on each limb should not classify as the clade Theropod, because that is one of its the main characteristics.
Excellent video. I saw “the bird look” in some of my Dino toys and models as a kid. Not a difficult idea to latch on to.
I have a resident crow family which patrols the neighbourhood. Once I started feeding them meat scraps, various fruit items, stale bread, etc. the family saw me as a provider. Being able to study these beautiful new age dinos is a joy for me and my cat. If I haven’t put out scraps for a few days, they peek in the window, wondering where breakfast is. The intelligence sparkles in their eyes, and the powerful beak certainly looks Dino-like! 🇨🇦🖖🏻🇨🇦
Very interesting video.
I assume archaeopteryx could fly for short bursts given its hollow bone structure.
It probably mostly used it for escaping predators since it's shaped more like a runner.
Yeah, I feel like thinking of them as living similar to modern Secretary Birds (maybe not the kicking tho) is a pretty plausible analogy.
You mistakenly show an enantiornith as your bird surviving the K-T event, when it's exactly what was wiped out at that boundary.
Remember that MOST birds went extinct when the dinosaurs did. The enantiorniths especially. They were the most successful Cretaceous birds, which is exactly why they died out, while niche birds that lived in burrows or water survived.
Love your work dude keep it up, watched this multiple times and will continue to in the future 👌🏽👌🏽👌🏽
Beautifully done. Please do more and expand with even more science even if speculative.
I will/am supporting.
The effect of that voice in the opening soundtrack is awesome.
I already knew that birds are dinosaurs but this video gave a lot of information so thank you very much 🙂.
Great video to fell asleep in a few minutes! And yes! Thats a good thing!
Last evening I saw a beautiful Eastern Bluebird while out walking around the apartments where I live, near Jamestown, NY. I haven't seen one of them in a long time. Too quick for a pic, though.
Love the calm voice and contents, only thing that can be improved is the scene transitional effect. It tears a lot and not looking good.
From 6:00 on sounds like you’re speaking an alien language
Man I love dinosaurs
As soon as I heard about birds being dinosaurs, I saw it. It’s so obvious now.
Only those in the order Theropod can be classified as modern dinosaurs. Calling all birds modern dinosaurs is a gross overstatement.
@@andrewgonzales6527 ALL birds are Therpoda! And it's a clade, not an order.
@@andrewgonzales6527 birds are theropods dingus just look at a feathery theropod and a bird and you can see the similarities
Especially how they move.
And / or big birds like emus or cassowaries. They ACT like what we imagine some dinosaurs did.
Avien or not, i love dinosaurs no matter what
Yesterday, while walking to cincy steak and lemonade, i saw some chimney swifts fly over my head, twittering and chirping their little hearts out as they flittered through the air gracefully. I even saw one dive into a chimney, presumably to feed its young some insects.
very good
Nah, it's night here, the theropods are all asleep.
I had to speed it up 1.25x, buts its a really good video.
Brilliant film...
The amazing thing is before the arrival of early hominids birds where already there ,we evolved hearing the sounds of birds .
that is truly amazing .
Probably why bird song helps lift me out of depression. I have pet budgies. And they bring such joy to my life.
The secretary bird is like a modern raptor 🦖it uses it feet with fast acting strike to catch deadly poisonous snakes and lizards in Africa. Plus the forest eagles the Philippine and harpy eagle are super dinosaur like also with there with there head crests and massive claws
The shoebill stork definitely has that dinosaur look too.
If you're putting the work in to make these pay a human being to narrate them
Interesting
stupid adverts keep interrupting my beautiful sleep.. but this voice is such a pro sleep-hypnosis.. i get back in there within minutes... im gonna use this video to get rid of my insomnia.. thank you sir..
Speed: x1,5
Oh my gosh thankyou !
Is this "fall asleep channel?" Theory=proven fact. Anyway, I appreciate the labor you have put into this. Only it's better to watch it double speed😅
I dig that you opened with the hard, unvarnished truth that birds ARE dinosaurs and it is a proven scientific fact.
Their were already flying birds back when the dinosaurs were here, they needed to really fly no matter where they were when the asteroid hit not glide from bush to bush.
I would like a study guide or worksheet to go along with this video. Has anyone found one?
Dromeosaurids have always been my favorite type of dinosaur , and to learn more about their ancestory is amazing .
(Verse 1)
In the ancient world, a fearsome breed,
Dromeosaurids, born for speed.
With razor claws and a hunter's eye,
They ruled the land, the predators high.
(Pre-Chorus)
In the Cretaceous age, they roamed with might,
Swift and cunning, a primal delight.
From the dawn to dusk, they hunted their prey,
Dromeosaurids, ruling their domain.
(Chorus)
Dromeosaurids, kings of the ancient earth,
With serrated teeth, a thunderous birth.
They ran like the wind, relentless and strong,
Dromeosaurids, the rock 'n' roll of the long gone.
Dromy-oh!-saurids, they rocked on and on.
(Verse 2)
Velociraptors, deadly and sleek,
Utahraptors, fierce and unique.
Feathers adorned their reptilian frame,
A sight to behold, nature's wicked game.
(Bridge)
Their claws were sharp, their jaws locked tight,
Leaping with grace, they struck in the night.
Silent shadows, stalking their prey,
Dromeosaurids, the rulers of the day.
(Chorus)
Dromeosaurids, kings of the ancient earth,
With serrated teeth, a thunderous birth.
They ran like the wind, relentless and strong,
Dromeosaurids, the rock 'n' roll of the long gone.
Dromy-oh!-saurids, they rocked on and on.
(Solo)
(Verse 3)
Now they're gone, a distant past,
But their legacy forever will last.
In our dreams, their spirit survives,
Dromeosaurids, rock 'n' roll revived.
(Chorus)
Dromeosaurids, kings of the ancient earth,
With serrated teeth, a thunderous birth.
They ran like the wind, relentless and strong,
Dromeosaurids, the rock 'n' roll of the long gone.
Dromy-oh!-saurids, they rocked on and on.
(Outro)
Dromeosaurids, we remember your might,
In our hearts, you shine bright.
Through the ages, your legend remains,
Dromeosaurids, forever rockin' in our veins.
Dromy-oh!-saurids, they're the rock 'n' roll flames.
Dromy-oh!‐saurids!
*Y'all put some Dino-feeders out on your porches and help these feathered friends OR ONE DAY they'll get big again and feed ON US!* 🦖🦖🦖🦖
Ostriches are basically already there, all they need to do is get a sharper beak and they'll have both the size and the ability to eat us
@@catpoke9557 some years ago at USC, I think, they tweaked a chicken's genes and were able to grow a longer tail and teeth on it.
(true story -- look it up)
Haha haha that made me laugh way too hard! My lil’ dinosaurs are demanding. Mine are fat little things!
Terror birds used to be apex predators in America
@@sithlordhibiscus9936 yeah...they eat like piggies 🐷🐷
Could you a video explaining the evolution of crocodilians?
With the plethora of food sources, I have to wonder why the birds aren't larger like wayyy back when. 👍👍⭐
The air had i higher oxygen level then it does today alowing them to be bigger thats why things are smaller today less oxygen in the air.
Finally someone with smarts, responds to my _Test_ questions,@@bendarkfangbravo4022 👍👍 5⭐🍀
Compitison from mammals
Only those in the clade Theropoda(three toes)can be classified as modern dinosaurs. Calling all birds(even those with 2 or 4 feet) modern dinosaurs is a gross overstatement. E
Yet again I tell you; ALL birds are Therpoda!
You clearly don’t know how phylogenics works.
@@aengor It doesn't look good getting the word wrong; phylogenetics.
So dinosaurs are reptiles or birds?
Dinosaurs are reptiles and birds are dinosaurs. So birds are infact also reptiles even though they don't look like other reptiles.
@@aronworlen1752 so a pigeon is basically close relative to a blue tongue lizard
@@ED-lk7il Not exactly. While both are reptiles they are still fairly distantly related from eachother. The closest living relative to dinosaurs are actually crocodilians.
@@aronworlen1752 Yup, which makes birds a pretty close relative to crocodilians, in a weird turn of events. Not SUPER close, but pretty close.
@@ED-lk7il close? No. However a crocodile is more closely related to a bird than it is to a lizard.
Thw really intresting thing is that the beak tht birds have really never was a thing until the jurrasic extinction .there were many other extinctions yet none of them evolved the beak which is weird😊
Look out the window u see a Bird.
China: What's a Bird?
You need to translate word bird to Chinese and then ask
@@SoulDelSol There are regions in China where u literally see no birds. They actively hunted birds during the culture revolution (one of Maos insane ideas). Today a lot of pollution and relentless destruction of nature. There a city's with parks where you don't see nor hear any bird. It's really strange if you recognize there is something missing.
@@prometheus9096 wow that's crazy
They say that birds did not out compete and replace pterosaurs..
So then what happened?? Why did birds evolve in the first place if pterosaurs were already occupying those niches?? Did pterosaurs not occupy as many niches as birds would?? What happened to the smaller pterosaurs?
The way I see it,
1) birds either evolved in one part of the planet, where there were not pterosaurs(which doesn’t make much sense, because why would there be a place where there were no pterosaurs?) then proliferated like an invasive species and outcompeted small pterosaurs…
2) Small pterosaurs went extinct for some reason (but why?) and birds evolved to fill in their vacant niches..
Or 3) Birds evolved into and began occupying niches that pterosaurs never really occupied in the first place, then proliferated into actual pterosaur niches(Still doesn’t explain what happened to small pterosaurs).
Birds started popping off as pterosaura began getting gigantic, they started to slowly fill nieches left by the pterosaurs. For the ones living alongside pterosaurs around the same size they were probably niece partitioning
"Would have coexist with some of the most infamous terrifying creatures" shows a whale shark lol
If you are not trying to fall asleep, I recommend playing at 1.25x speed. yw
Why are the comments full of short bus people
I remember when I younger I noticed that birds look a lot like dinosaurs now I know it’s because they are dinosaurs 🔥
Only those in the order Theropod can be classified as modern dinosaurs. Calling all birds modern dinosaurs is a gross overstatement.
Another major point are air sacs and no lungs in birds. Air sacs were in dinosaurs.
Hen are dinosaur 🦕 now
Archaeopteryx reminds me of a roadrunner.
If dinosaurs had a brain of raven, they would survive asteroid disaster
Lmao what’s with all the paleontologicaly challenged creationist in the comments?
when you eat chicken you are eating dinosaurus.
That's ok 👍
"when you eat chicken you are eating dinosaurus."
- not at all
The avialan theropod dinosaurs finally lost their arms which would have eventually happened had the non avialan dinosaurs not become extinct at the end of the Cretaceous. They’re the only surviving dinosaurs. 😊
Only those in the order Theropod can be classified as modern dinosaurs. Calling all birds modern dinosaurs is a gross overstatement.
@@andrewgonzales6527 The endothermy in theropods evolved once and we can assume feathers emerged like that as well. I’m picturing T Rex as an overgrown, colourful chicken… with teeth instead of a beak! 🙂
The non bird dinosaurs went extinct, the birdosaurs lived on and became.....birds.
Why have you slowed down your voice?
Just think, every time you eat chicken, you're eating a dinosaur.
I like to give the bird😜
Personally, I do think archaeopteryx could fly. It makes sense why people think it could only glide when you look at shrinkwrapped depictions of them. But when you look at depictions with full contour feathering and large, aerodynamic wings, the only thing that could really stop it from flying would be how far it can extend its arms and how muscular they'd be. Something tells me that with a body so perfectly aerodynamic, you'd probably be an animal made to fully fly, not just glide.
The problem wirh archaeopteryx is its cheast. Birds have their sternum drasticly inlarged in to the keel, to support the massive muscles needed to fly. Archaeopteryx does not have a keel, its sternum is not much diffrent from other theropods. Even the most flightless birds that lost their keel still have a larger sternum than archeopterx. So it is questionble if it had the power for anything if at all for more than a very short and weak flight. But like you said. Archaeopteryx was very aerodynamical, with at best very, very poor flying abilities, and also was a good climber. That all makes it look far more like a glider than a flyer.
Yes. Though i feel like it could glide but in terms of outright flight it couldn’t fly for long - only in short bursts.
Yes, it could definitely fly. It's body was clearly adapted to do so. You don't need a Keel to flap wings. Bats, Pterosaurs, nor flying Insects have them. You just need strong enough pectoral muscles to flap your arms enough to get airborne, and remain there. Vertebrate Fliers almost all practiced "gliding flight" strategies. Hummingbirds may be the sole exception, mimicking the Insect flying method, and paying a gigantic metabolic price for that. Archaeoperyx could have flown like Seagulls and Vultures like to fly, flap enough to get into the air, to control the direction they are going, to keep from plummeting to their death, but otherwise using mostly gliding techniques to travel in the air. Keels simply make a more powerful flier like a Falcon, or Sparrow possible. In the late Jurassic, the only other Vertebrates airborne were Pterosaurs, who were more Batlike fliers, so Archaeopteryx didn't have to worry about a Falcon hunting it like Pigeons and other flying creatures do today, so it didn't need a Keel to be capable of very powerful flight. It was enough to be able to get airborne and a few flaps here and there to keep you there. You don't need a Keel for that.
@@jonathancummings6400 I agree. Personally I think the keel is just one method dinosaurs found to develop strong flight muscles. I am willing to bet archaeopteryx had its own methods. It's just so aerodynamic. From what I've seen, gliding animals tend to have very unintuitive bodies for flight, because there's no point in maintaining a body built for flight if you can't actually achieve it.
Birds, archaeopteryx, and microraptor all made huge sacrifices to achieve the bodies they had. The only reason I could see for them to evolve such a delicately balanced body without being able to truly fly, would be if maybe the only way you can possibly glide using feathers is to have an optimally aerodynamic body. That is the only reason I can think of. And I don't even know that it's true. It probably isn't. But maybe.
If it is true, then maybe archaeopteryx couldn't fly. But if it isn't true, I am willing to bet it could.
I mean, really... Dinosaurs with wing feathers on their legs had trouble just walking, because they could break or dirty their feathers if they dragged them on the ground. The adaptations they had for going airborne were immensely double-edged. They were great for getting them in the air, but made many other things much harder.
EDIT: I just recalled, archaeopteryx didn't have the four wings like microraptor- it had long feathers on its calves, so it had sort of a half-wing that looked like trousers. Microraptor was the one with the four wings. So archaeopteryx would be able to walk normally. Still, the adaptations to achieve flight are great and double-edged.
@catpoke9557 Yes. So.much that is about modern Paleontology and Evolutionary theory seems to be an attempt to compromise to achieve some sort of unified consensus, rather than seeking to learn absolute truth. The whole Archaeopteryx isn't ancestral to modern birds but something very similar to it was type of statements feel like some prominent Paleontologists and Evolutionary Scientists refuse to go along with Archaeopteryx being a true "first Bird", and truly ancestral based mostly on some sort of bias, and using some minor traits that differ with modern Birds to stand firmly in their not a direct ancestor position. I get tired of hearing that it's not the fossil found but a common ancestor close to it. gave rise to said lineage. Occasionally, it's even attempted with the Homo Erectus into Homo Sapiens lineage, but it's so silly, they've finally really stopped doing it. Homo Ergaster belongs to that era, it's really just a Homo Erectus variant population. It works with Chimps and Humans, sort of. Actually the truth is when looking at the actual fossils of Ardipithecines, and Australopithecines, the "common ancestor" was VERY CHIMPLIKE, just not adapted to knuckle walk. They were more like modern Chimps in appearance, body design and brain development. This "common ancestor" could easily be described as a primitive Chimpanzee from 7 million years ago after the split with the ancestors of Gorillas, that had yet to develop the defensive canine fangs, or knuckle walking capability. This more generalized, primitive Chimp surviving descendants went into two directions of mixed results, ultimately surviving, but only 3 species are still extant. The common Chimpanzee, Bonobos, and Humans. The Human side suffered a great disaster, more than one major extinction events. There were multiple Genus' and a great many Species, and only one is left, barely, if the limited genetic variance is any indication. There was a point in the past 100,000 years when there were maybe 4 or more species of Hominin, Homo Erectus, Flores Man, Neanderthal Man, Denisovan Man, Pleistocene Homo Sapiens, before interbreeding with the others, except for maybe, Flores Man, and all were diminishing and clearly going extinct. Had the "Homo Sapiens", not rallied, and then mated with and preserved the genetics of all said groups except for Flores Man, an Alien Paleontologist would have been able to visit now and note the extinction of the highly derived fully bipedal relatives of the still extant Chimps, Bonobos, and Gorillas despite the clear diversity, and major series of species development of a 4 million year period. But I digress, anyway, I believe Archaeopteryx both was capable of powered flight, and was the direct ancestor of all later Birds, and Dromaeosaurs as well. I actually consider "Birds" to just be a surviving highly derived type of Dromaeosaur. Like if Deinonychus genus descendants had a major adaptive radiation for the rest of the Cretaceous, then, all but one lineage went extinct during the Mass Extinction event 66 or 65 Million years ago, then they have a major radiation into a vast number of genera and species during the following Cenozoic Period. That's what I think happened with Archaeopteryx, I think it's the basal Dromaeosaur, and all the later Dromaeosaurs and "Birds" are it's descendants. I think of fossils like "Archaeopteryx" as an example of an evolutionary stage in a lineage. Sometimes they ultimately go extinct, and sometimes they seem to lead to modern organisms somehow. There must have been "Archaeopteryx" type dinosaurs in more than just where they were preserved under very unique conditions. These, feathered, flying capable Coelurosaur Dinosaurs are in the perfect time to give rise to the Maniraptorans of the later Jurassic and into the rest of history up to the present. They are exactly what is needed also. Hence, I consider them basal Dromaeosaurs and "Birds" as actual Dromaeosaurs, not just close relatives.
So now they gather outside my window and stare me down when the seed runs low. 😂 or if they want some human food or for me to kill a skink for them.
From Dino to dinner
Their were birds flying around when Tyrannosaurus was around but not millions of years before them
Urvogel T.T
Hypothetically, if a environment changes to be more like the environment the dinosaurs lived in, could a creature or a bird, like the cassowary slowly evolve into a dinosaur-like creature? Similar to an archaeopteryx? Or something in that general form? And this hypothetical environment isnt a real environment, and this is just a question. Something kind of like this 7:53
Was the pelvis of Archeopteryx Sauruschian or Ornithischian?
whichever hip structure theropods have would be the answer
Some of the questions I get is do you believe there's intelligent life outside of the Earth, the real question they should be asking is there any intelligent life left on this planet. If you really believe that a Tyrannosaurus turned into a chicken then you seriously need mental help.
The theory of evolution in no way predicts organisms change species. Changes are hereditary.
Nobody claims the t.rex turned into a chicken. Try again
Yep yep yes sirEEE, i sppose a brontosaurus turned into a bid fat turkey??? This seems to be such a far fetched clutch at straws! Why??? Still tryin to work that out i guess
Just give us more time 🤣
Really? The Body design is similar. Also such a "Dinosaur" lies dormant in the Chicken genome. Jack Horner's team, over the past decade have developed the capability to create awaken the Maniraptoran Dinosaur genes in Chickens to create the mighty "Chickenosaurus" by perhaps as soon as 2025 they will have taken the humble, tasty Chicken, and restored it into a mighty Dromaeosaur, which is the lineage of Dinosaurs "Birds" belong to. The group of feathered Dinosaurs Velociraptor, Denonychus, and Dromaeosaurus belonged to also generated small flying types, one of whom survived to the present day, and we call them "Birds".
36:50; 5:44; 0:03;
Bird of paradise?
Here’s something to blow your mind: birds are technically a kind of reptile. They belong to the theropod family of dinosaurs. Dinosaurs are archosaurs, where birds and reptiles evolved from, so the non-avian dinosaurs are kind of a mix of both.
Birds are the only reptiles alive that have feathers and can fly
Except for draco lizard but I'm talking about actual flying not gliding
Dinosaurs still exist. Batoven proved it.
Only those in the order Theropod can be classified as modern dinosaurs. Calling all birds modern dinosaurs is a gross overstatement.
"......lived in late Cretaceous Mexico" ... oof, thats not a good place to choose.
I believe they are all birds, with and without wings, judging for the age of the fossils, birds and no avían dinosaurs have roughly the same age, seems like once they all share the planet at the same time
Birds as a group (Aves) appeared during the late Jurassic, so they coexisted a long time, specially on the Cretaceous period.
I laugh everytime someone says, "when dinosaurs ruled the world" and they don't even realise dinosaurs STILL rule the world!
Only those in the order Theropod can be classified as modern dinosaurs. Calling all birds modern dinosaurs is a gross overstatement.
@@andrewgonzales6527 wow... You are a perfect example of someone who thinks they know what they are talking about because they got their education from UA-cam videos...
-Dr Sloan
Am the only person who loves documentaries but hates A.I. narrators? 🤔I
MUST watch at 1.5 play back speed too not fall asleep!
dinosaurs were colored like birds
Why did he spend the first 3 and a half minutes explaining what a bird is?
The theropods had arms that were wings. Obvious.
Some problem criticizing the actual theory of evolution instead of making of premises and anatomies?
Not all
You said "not JUST a theory but a scientifically proven fact"
I'm sorry, but a theory IS actually the very definition of a scientifically proven fact.
1:01 I think you meant descendants not ancestors.
I caught that too. ;)
Sounds like this robot narrator evolved in North America, forcing its human biological equivalents to the brink of extinction.
The video screen picture is misleading. Dromeosaurs didn't evolve into birds. Dromeosaurids actually evolved after birds and mammals.
Dromeosaurids are simply close relatives to birds
What's your basis for 'Dromeosaurids actually evolved after birds'?
@@Dr.IanPlect Early birds evolve during the early jurrasic, they were gliders at this time.
Dromeosaurids evolved mid Jurassic
@@trvth1s I'll ask again; What's your basis for 'Dromeosaurids actually evolved after birds'?
- do try and answer what is asked
@@Dr.IanPlect read my previous comment, it's in English which you seem to somewhat understand.
For sources you're welcome to use the search engine Google.
Don't expect others to do your homework.
@@trvth1s Your comment is very confusing? The earliest known bird is from the late Jurassic as focused on in the video.
Kkkkk, nem que se desse a eternidade!
Utter bosh. Stick around, people. Within a decade this entire ''dinosaurs to birds'' theory will be ditched.
Humanosaurus yu forgotten!😂😂😂
My parrot can say a few words. His favorite word is gay. He calls everyone gay.
I wonder if dinosaurs could do the same.
Possibly yes maybe dinosaurs could mimic lots of animals speech I doubt it will be as advanced as parrots
@@OptimusPrime-od3zhhow is cybertron?
@@pierre-samuelroux9364 good
@@OptimusPrime-od3zh :)
@@pierre-samuelroux9364 thanks
I actually really hate this fact. It just ruins the dinosaurs's legacy. They were a race so powerful that it took cosmic intervention in the form of an asteroid to wipe them out. That's metal, it would've been awesome. But now T. Rex has evolved into a chicken and is now being slaughtered by the thousands and served as a KFC family bucket to a morbidly obese gooner. What a fall from grace.
sucks for you i guess.
Only those in the order Theropod can be classified as modern dinosaurs. Calling all birds modern dinosaurs is a gross overstatement.
@@andrewgonzales6527 all birds are theropods.
Nobody has ever claimed that T-rex evolved into a bird.
Play at +25 speed as the ai narration is unnaturally slow.
And BTW birds are a branch of the dinosaur family. Eat a chicken or a T Rex it's the same though a T rex could feed an army. 😂😂
Ai same info over and over.
How many times do we need to hear it lived on the ground.
Ugh
What a ?????????
What is a bird to you
That thumbnail is... very unpleasant. The first dinosaurs were feathery, not scaly. Feathers are not a trait their ancestors gained with time. Rather their feathers became more complex with time. A more accurate thumbnail would represent an early theropod with simple fuzzy feathers, then a dromaeosaur-like dinosaur with pennaceous and contour feathers (but probably no toeclaw), and then starting from the toothed bird in the thumbnail everything is more or less accurate.
How do you know?
He doesn't know. Evidence of feathers did not appear until jurassic and dinosaurs had been around since the triassiac
Nerd
@@relentlesseducator : like he was there or something....
@@IamAWESOME3980 No, we do know, at least we know that the answer of them having feathers ancestrally is the most likely by far.
To start with, pterosaurs had feathers. Unless this very complex structure evolved twice in the archosaurs, with two animals that just so happen to be very closely related, this means the ancestral ornithodiran- the common ancestor between dinosaurs and pterosaurs- had feathers. And therefore, unless it immediately lost feathers when it became a dinosaur but did not when it became a pterosaur, this would mean the first dinosaurs were scaly. Considering many dinosaurs have feathers, this... is not likely to be true.
Moreover, feathers are present in both saurischian and ornithischian dinosaurs, and are present in many basal dinosaurs and absent in derived ones. Example: Tyrannosaurids. Basal tyrannosauroids are all feathered, but derived tyrannosaurids are likely all scaly.
The dinosaur that pushes the idea of ancestrally scaly dinosaurs to the point of being a near absurd idea? Kulindadromeus.
Undeniably ornithischian, and a basal one at that, with not only undeniable feathering, but lots of different feather types- many of which look exactly how we expect basal feathers to look.
In order for dinosaurs to be ancestrally scaly, feathers would've had to convergently evolve MULTIPLE times within the ornithodirans, and NO other group has evolved anything even similar, except possibly longisquama.
This is so unlikely that unless someone can find extraordinary evidence, it is considered almost certain that the earliest dinosaurs were all feathered. And that isn't even all the evidence we have- just some things I can remember off the top of my head.
Indeed, feathers seem to be the trait that separates dinosaurs and pterosaurs from all other reptile groups. Even the scales of dinosaurs without feathers are... actually technically feathers, just highly derived ones. So they're a trait all dinosaurs share with each other.
Great Video !
Except... just before the end , the Narrator states that birds "...are the direct descendants of the amazing reptiles that once ruled our planet"
Reptiles? Dinosaurs WERE NOT Reptiles! Sheesh!
Dinosaurs were reptiles bruh it proved
Yup, I've had to kill 3 little male T-rexes for attacking my grandkids. We called them roosters.
But the genetic remodrling of scale to feather is absurdly complex.. and the little hooklets which hold barbs together with preening...wow which hold the
T. rex isn't ancestral to birds.
He 219 uhu
Corsair
😅
Against your religious beliefs
Birds were alive and flying around and living when dinosaurs were alive. So how can birds come from dinosaurs. Birds are warm blooded, reptiles are cold blooded?????
Dinosaurs ARE warm bloodee, they arent really lizards, they are archasaurs which are a type of reptile but not a lizard. Therapods had existed since the triassic, they evolved feathers first. So in some different lineages of feathered small theropods split into bird like and some slit off into dino bird like. We also know they are related to dinosaurs due to skeletal and (kinda) behavioral structures as well as feathers