Top 4 Paleontology Theories That Turned Out To Be True

Prepare to be amazed by these scientist’s abilities to predict the future…or the past? Future of the past? Past of the future… you get the idea!
All Your Yesterdays: irregularbooks.co/download.html
All Yesterdays: irregularbooks.co/
All use of copyrighted images belongs to their respected owners.
- Bearded Ceticaris by John Meszaros (www.nocturnalsea.com/Bearded%2...)
- 02:37 An artist’s conception of T. borealis in the ancient sea. Copyright Jakob Vinther, University of Bristol, UK (www.bristol.ac.uk/earthscience...)
- Tetrapteryx by William Beebe (public domain)
- Life before Man by Zedek Spinar (chasmosaurs.blogspot.com/2012/...)
- Microraptor by Science/AAAS
- Skull Islands Vulturesaurus by Weta Workshop (thomastapir.tumblr.com/post/11...)
- Dougal Dixon’s The New Dinosaurs
- Andrea Cau (theropoda.blogspot.com)
- Andrea Gassler (juniorwoodchuck.deviantart.com/)
- Yi qi by John Conway (johnconway.co/)
- Feathered Syntarsus by Sarah Landry (babbletrish.blogspot.com/2011/...)
- Various by Gregory S. Paul (gspauldino.com/part2.html)
- The Warm-Blooded Dinosaurs (chasmosaurs.blogspot.com/2011/...)
- The Illustrated Dinosaur Encyclopedia (chasmosaurs.blogspot.com/2012/...)
- Kulindadromeus by Andrey Atuchin
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[@Aozame]

My favorite is the guy who, in the 1800s, not only correctly classified whales as ungulates, but correctly listed them as close relatives of hippos.

[@Jotari]

That doesn't seem like a large leap in logic if you think of it in a certain way. Fact: Whales are mammals. Fact: Most mammals dwell on land. Conclusion: Whales evolved from land dwelling animals. Speculation: What land animal is aquatic and relatively large? Answer: Hippo. It's not flawless logic. But I can see how someone would think hippos if you're specifically looking for a land animal that seems whaleish.

[@shinyknighttt]

@@Jotari Well, if you think about it after the fact, it's not so hard, which is what I think you're doing.

[@oopdi]

floooooooooooooooood Your logic is very flawed. Let me demonstrate Fact: Golden Retrievers have webbed feat Fact: Ducks have webbed feat Conclusion: Both animals have a recent common ancestor Fact: This is wrong and they independently evolved webbed feat

[@audreyl.4876]

oopdi yeah but dogs and ducks are different. Hippos and Whales are both Mammals, whereas dogs are mammals while ducks are birds. Besides, OP even admits that the logic is flawed, but the point is that, while it's not something that most people would consider, it's not a difficult leap to make. Edit: Not OP, but the first commenter/replier. My bad.

[@Retrenorium]

@@oopdi no they were crossbred

[@kylelangdon6724]

For every 13 mistakes, we get 4 right. :)

[@jeffreygao3956]

Then lets make 325 mistakes to get 100 right!

[@PaleozoicProductions]

Yep, ALL DINOSAURS HAD FEATHERS no.... no trey, some would overheat and die, so shush

[@exosianteatime1517]

i hope your joking because he has never said that ALL dinosaurs had feathers. of course this could just be a r/wooosh

[@COVID-19_Crab]

A dinosaur without feathers would die of the cold in winter

[@imlonelypleasehelp5443]

DinoCoat the Gaming Tyrannosaur too bad T. rex didn’t have feathers in adulthood

[@SprinkledFox]

I don't know why people say that feathered dinosaurs ruined their childhood. Feathered dinosaurs ENHANCED my childhood!!

[@EmmaSpAce111]

I think they never saw an owl before

[@satorunovellibrary]

yup accept the truth and keep going on with it ... feathered dinosaurs is amazing, more colors and more bird-like behaviours, i look at chickens and think about T Rex , they re the same i think , T Rex doing chicken s thing :D

[@charlottewalnut3118]

Cupcake Draws It honestly depends on the animal and how the feathers look for example it does kind of look stupid on a T Rex simply because big scary monster sounds cooler with the raptors the reason it looks cool it’s because feathers can Austin come in lots of bright shades or aid in camouflage and disruptive patterning making them even harder to figure out that they’re following you so that I can make them scarier you can’t make at tyrannosaurus scarier At least not without it breathing fire

[@PaleozoicProductions]

They did, but Trey has too much crazy theories of all dinosaurs having feathers

[@TWolf-gt6if]

Cupcake Draws Fluffy t-rexes man

[@ian_b]

"Birds are dinosaurs" was still a minority view as late as the 1990s, when I read Backer's The Dinosaur Heresies.

[@dionaeamuscipula6649]

Birds are dinosaurs

[@ImVeryOriginal]

@@dionaeamuscipula6649 Birds aren't real

[@MissBloomie890]

​@@ImVeryOriginal have you seen a chicken?

[@peeperleviathan2839]

@@MissBloomie890 B-iogical I-ntelligence R-elay D-rone

[@IceFireofVoid]

I know it seems really impossible and odd, also possibly impossible to prove, but I'd love it if there were bioluminescent dinosaurs, or any other large reptiles from that time. Imagine a Spinosaurus mating display with it's sail covered in lights, or a glowing Elasmosaurus. Color-changing dinosaurs would also be something really cool that we would never even know about.

[@Igamingzpro]

20 years from now, if they discover this, I will remember this comment.

[@suhailnahhas8027]

SnowScales bioluminescence is rare in none-piscine animals, but who knows. i saw an entry for all yesterdays once from Pristichampsus on deviantart about pterosaurs possessing pelican-like throat pouches and gulping or investing bioluminescent plankton and using it for orientation. as for color change, some could've color flushed to look more threatening or imposing. however, to achieve the level of color change like in chameleons or cephalopods, there needs to be a well-developed neurosystem to control each pigment in the skin. and with small dinosaurs usually having a good brain to body ratio, i suspect maybe small theropods would be more likely candidates.

[@1Venom859]

There are natives from Indonesia and central Africa who say pterodactyls live in those areas and eat rotting flesh. An interesting description of these creatures (called kongamoto) is that they glow in the dark. I would say your comment is not far off in expressing that theory.

[@suhailnahhas8027]

i think you're confusing the ropen from papuan new guinea with the kongamato in africa. the ropen glows, the kongamato doesn't.

[@yippaindahood2642]

+SnowScales that could be proved,i did onetime imagine a bioluminesent Velocoraptor

[@Pssybart]

How about T.H. Huxley? In 1868 he compared Archaeopteryx to Compsognathus and hypothesized that birds evolved from theropods. His claims raised a small debate and we even see some dinosaur illustrations from that era as bird-like creatures. Though it would take over a century before Huxley's point was finally proven, he could be seen as pioneer in the bird-dinosaur connection theory.

[@zachbrown9564]

At 18:05 I believe it references that. Lol five years later l, sorry if I bugged you with a notif

[@TREYtheExplainer]

I apologize if I was rude to anyone in the comments for the past few weeks, I am going threw a transition period in my life right now and very stressed out. I am sorry.

[@TonyAKA30]

Keep up the great work! You really have the coolest videos on the topic of paleontology. Wish you a smooth transition in your personal domain.

[@TREYtheExplainer]

Tony Koter Thanks man! I'm trying ;)

[@BinaryRex18]

TREY the Explainer Good luck with your transition man! :) Also, could you please do a wormhole video?

[@willie9084]

TREY the Explainer ITZ ALL GOOD!! Life can be a bitch and sometimes you just got to yell at that bitch. I hope you get through it soon

[@adamgrogory]

TREY the Explainer I wish you well, Trey

[@HoopsAndDinoMan]

Would you ever want to do a list of your favorite not-yet-proven dinosaur speculations from paleoart? I'd be very interested to see that!

[@pacman5698]

Spinosaurus being semi-aquatic was not on the list? I'd say that deserves to be at least in the Top 10, it's the first sub-aquatic dinosaur ever known to science! Btw, that infamous mammoth reconstruction still makes me laugh my ass off.

[@angeliesalvebernardez8587]

It's a cow with a broken right tusk.

[@themiller3940]

It kinda amazes me since you'd think people would of found cave paintings by then, or hell, even just told down in legends so when they found one it was like: "oh it's one of those things and not warthog on crack"

[@DavidBarkland]

@@themiller3940 The thing is, there probably _are_ legends that are actually about mammoths. We just don't realize since the stories and languages have mutated so far over the last 20 000 years.

[@shayposting]

@@angeliesalvebernardez8587 It's actually a decomposing basking shark.

[@badtime6532]

"Holy crap! This prediction has been proven correct, and with such a cool name too! Tetrapteryx is so cool!" "let's call it microraptor" "But sir-" "IT'S MICRORAPTOR IF YOU QUESTION IT AGAIN I WILL FIRE YOU" "ok sir"

[@niagaradrones]

But sir it’s a mircroraptor This mans delusional, take him to the infirmary

[@rocket8869]

Fucking microraptors. I always get knocked out on the beach just trying to make a hatchet.

[@untitledtorch1919]

Khutz lmao then a dilophosaur comes and finishes you off

[@fidgetnoodle4912]

Khutz The question is do they glide or fly 🤔🤔

[@yanuchiuchihaanimegamesand3907]

@@fidgetnoodle4912 Glide, They don't have the skeletal structure of birds that use flight freely

[@AndreasStom]

I read in a comment that you where stressed out because you are running low on money. That sucks... You should make a patreon or somthing like that so we can donate.

[@TREYtheExplainer]

It's alright, I'm fine now. My KZbin network wasn't delivering my advertising money at the correct time.

[@TREYtheExplainer]

reptileawsome Thanks man! I may do that

[@onigbajamo]

TREY the Explainer What was the name of the documentary that predicted how animals would look in the future?

[@oneandonlynino]

Demi Ladipo-Eki The Future is Wild

[@AndreasStom]

TREY the Explainer I see that a lot of effort and research is being put into these vids. You deserve more than just the ad revenue.

[@tartnouveau3652]

Even in the early 2000s when I was a kid most dinosaur books (for kids) that I had never included dinosaurs with feathers. I remember knowing that birds were descended from dinosaurs but I don’t think I learned most dinosaurs probably had feathers until I was in high school

[@AverageAlien]

They didn't just descend from dinosaurs, they ARE dinosaurs

[@jackthunderbolt4307]

Sometimes, people have the greatest predictions and when they turn out to be true, you can't help but be impressed

[@Is44cSh4rk]

The moment he said "2015, this year" i felt 10 years older

[@amazinglyidiotic8607]

I have a theory all these guys are time travelers and are just comeing back to mess with us, uninformed paleo fans.

[@lordpengwinviii4825]

I have a theory your wrong

[@RB-fo5id]

DinoCrusher I have a theory. You need better grammar :D

[@COVID-19_Crab]

I have a theory that people who make dinosaurs scaly are trying to fool us o_o

[@kvarnerinfoTV]

No you don't. Learn what scientific theory meaning is. Cell theory anyone 👀???????

[@WHOOOSHXDOfficial]

@@kvarnerinfoTV r/woooosh

[@justaguy6100]

I read a book as a child called The Enormous Egg, 1964, where a chicken laid an enormous egg that ultimately hatched a triceratops. I was just a kind, but I remember being very fascinated by the comparisons that the author made in that book to birds and dinosaurs, such as scales on the legs and the bipedal walking of the therapods and such. Of course archeopteryx was well known by then, too, but this was quite a while before the discoveries of so many feathered dinos. The Scholastic Book Club was the analog to what the online gaming services are today, for me. Looking through the list of books, spending a few bucks, and getting these hard bound quasi surprises a couple of weeks later, man that was something. You have to imagine a world where there were only 3 "real" television stations, no cable, no internet, hell you had to get up and change the channel when you were ready for your show. And you turned it off when it was over. So those books were really a thrill when it was too inclement to go outside. Ok, I wandered a bit down memory lane, but I've remembered that book often when the more recent revelations of the link between today's birds and the ancient dinosaurs has become so much clearer. When was the last time you bought a book, looked forward to reading it, just sat and poured over it? I have to admit it's been a very long time for me.

[@TheProudKiwi]

Oh the days of the Scholastic Book Club awesome memories:)

[@joaquinserrano-armas666]

I know that book too!

[@Leonardo-kl4nq]

Trey: "it is possible that every dinosaur had feathers!" 2019 people: "If only you knew... If only you knew..."

[@boggybeard]

even sauropods? I mean like, I dunno it just seems sorta weird. and like triceratops covered in birdlike feathers? very strange indeed.

[@Leonardo-kl4nq]

@@boggybeard that was the joke lol, not all dinosaurs did in fact have feathers, take tyrannosaurids as an example

[@boggybeard]

@@Leonardo-kl4nq ah, I see now. Thank you for the clarification.

[@elijhajefferson3338]

@@Leonardo-kl4nq I think that they theorize that tyrannosaurids had feathers too tho

[@TheHedgehogEnthusiast]

@@elijhajefferson3338 if they did than it would be a very small amount of feathers.

[@tinnitusthenight5545]

This makes me feel so old cause I grew up really interested in dinos back when the feather theories were just picking up steam. Learning about that was being on the cutting edge of science to 5 year old me. Edit: it blew my mind

[@TriassicIceman]

Micro-Organisms have feelings too...

[@Irritator]

The Cove ..Eh? Kind of, not really...

[@dionaeamuscipula6649]

They are not that intellegent

[@LennyLenward]

+Jeremy Leer How insensitive! That's racist against bacteria!

[@dionaeamuscipula6649]

datAkwardSwedishGamer But... They don't have brains

[@admiralcat3809]

Jeremy Leer dont be rude. bacterias have nucleus too

[@cheezemonkeyeater]

Scientist: *invents creature because it would be cool. Paleontology: *discovers it actually existed. X-Files theme: *plays

[@hedgehog3180]

The first one is the best imo. He just completely predicted the existence of an animal through nothing other than some well thought out speculation and he got it pretty much spot on.

[@MrHootsMannST101]

Lol ripped pterranodon

[@k4re0l]

lmfaoooo

[@isuruFO]

Lol

[@themalaymenagerie3350]

egg dee

[@opabinnier]

Only one R in Pteranodon.

[@lukeskywalkerjediknight2125]

SpaceTaco 101 lol

[@Tungdil_01]

This video needs part 2. Every 5 years or so a lot of things change in palaeontology

[@jeffreygao3956]

This was a fun video. Now I'm going to predict the discovery of a massive T. rex sized Abelisaurid just like in Disney's Dinosaur. The evidence? The 2014 discovery of Dreadnoughtus, a giant sauropod at a time when Carcharodontosaurids were extinct. Where there are giant herbivores, there are giant carnivores. It's a pattern seen through time periods and continents. In Late Jurassic Asia, there's Mamenchisaurus and Sinraptor. In mid Jurassic Europe, Cetiosaurus and Megalosaurus. In Late Jurassic America, Diplodocus, Apatosaurus and Brachiosaurus with Ceratosaurus, Allosaurus and Torvosaurus. In late Cretaceous Argentina, Argentinosaurus and Mapusaurus. In late Cretaceous America, Tyrannosaurus and Alamosaurus. Now late Cretaceous Argentina again but with Dreadnoughtus. There's a piece of the global puzzle missing...

[@TREYtheExplainer]

Thank you! and cool prediction!

[@kirbyzaneobi]

Jeffrey Gao 😕

[@jeffreygao3956]

What part did you not understand? I am free to clarify.

[@TroodonJesus156]

Jeffreys right that pattern happens in the ocean with marine reptiles, mosasaurs and plesiosaurs, pliosaurs and icthyosaurs, theres just so many predator prey scenarios

[@DunkelheitEbony]

I know this is an older comment, but it is true! For every prey, there is a predator! It's how every ecosystem works. Someone eats someone else.

[@willkelly7008]

That finger-winged "dinosaur" at 5:38 is actually a derived pterosaur called the harridan. Though the next image the "flurrit" is a small arboreal coelurosaur that has gliding membranes.

[@thatswhatshesaid2777]

The new dinosaurs may be my favorite of Dixon’s speculative zoology books

[@bravo075]

Man... Can you imagine the amount of fossils that are in the deepest parts of the ocean?

[@Synthose1]

Hey, Dougal Dixon never predicted flying dinosaurs, you showed a pterosaur in that book called a Harridan, the other being an actual dinosaur, the Flurrit. He didn’t predict feathers either, they were actually modified scales that he called “hair” and “fur”

[@cheezemonkeyeater]

Ah, feathered dinosaurs. I had a friend once who argued with me that dinosaurs didn't have feathers purely on the basis that this would look stupid and even denied fossil evidence by saying "scientists are wrong all the time." I would jokingly say that this ended our friendship, but it did not. It did spur me on to make feather dinosaurs look cool, though, so I redesigned some old fantasy species I'd come up with way back when I was 12 that were basically dinosaurs that survived the extinction and evolved into intelligent creatures. The two species were the Utahraptor and the Troodon. The Utahraptor creature I basically just added feathers to, but I laid out how it used its feathers in display as part of its nonverbal communications as well as for mating displays (and had I had the ability, would have made a video of it being sexy and doing a fan dance with its wings). The troodon, I gave a big cockatoo crest and blue-green feathers with a white underbelly. The crest was a sort of emotional intensifier and it would stick up when they experienced elevated emotions. I'd also made them super scientifically advanced, so I tried to draw one as a cyborg, but . . . well, I wasn't very good at drawing and I was even worse at drawing mechanical parts, so that piece sucked, but I ended up using the character. Prof. Shanad, a troodon who'd survived the bombing of his home-town when a extra-dimensional aliens (referred to as demons, because that's what the human slaves they brought with them thought they were; that fantasy world was crazy, now that I think about it) and needed to have the left side of his face, including his eye, one arm, and a significant portion of his lower body replaced with mechanical reconstructions to give him full mobility again. I even wrote a thing where his lab assistant openly lamented the loss of his feathers, as his one wing that was still organic had the most beautiful plumage she'd ever seen. I still don't get why there's so many people out there who are so resistant to the idea of feathered dinosaurs.

[@lyrqk5829]

those all sound freaking awesome. do you still have the drawings?

[@cheezemonkeyeater]

@@lyrqk5829 No. As I said, I sucked at drawing, so it didn't turn out well. I should maybe try again.

[@ZHSarco]

Hey, those characters sound a lot like my own things I made, now I am very intrigued to hear and see more of these characters!

[@AltairBlue]

@@ZHSarco same here, except it's large, upright dromaeosaurs that have weird nose crests and primitive beaks what is it with people and dromaeosaurs/feathered dinosaurs as spacefaring sapient creatures?

[@Derpy1969]

My boss used to say “even a blind squirrel occasionally finds a nut” referring to even crazy-Ass guesses sometimes are right. Hey, I guess the weather all the time based on nothing at all!

[@Domenicomn]

7:25 "which is weird cause birds are dinosaurs" LOL sick burn love the fact that thats a fact (get it?)

[@dacookiebrozliam1815]

Episode suggestion!: Everything wrong with, Walking with Dinosaurs / BBC Documentary!! ( You choose the episode)

[@ktsp2538]

I love that documentary

[@cassiesevigny]

I know others have said this, but you look at a variety of scientific fields so nuanced-ly that I'd like to reiterate the following correction: without evidence, an idea is a hypothesis. Once evidence is found the hypothesis is supported and BECOMES a theory. Theories are strong. "Just a theory" is oxymoronic.

[@waynedombrowski7568]

Bob Bakker is da man! I did a paper in college about his book,"The Dinosaur Heresies" in which he proposed that at least some were warm-blooded, feathered and direct avian ancestors. The idea stll hadn't gained wide acceptance or popularity,so it seemed truly prophetic when soon after, treasure troves of new feathered species were discovered in China. Like Galileo and Einstein,Bakker birthed big ideas before their time,and fortunately didn't have to wait long to see his vindication.

[@henriquenakamura5752]

7:25 "Was once a Theory with no evidence". If there's no evidence, it's a guess not a Theory.

[@jk844100]

Henrique Nakamura it’s speculation

[@PennyDreadful1]

@@jk844100 Hypothesis.

[@LeoTheYuty]

If there's no evidence, speculate wildly.

[@Thejoshrandall]

Insanity celebrated as science praying on the naivete of children

[@generalgrievous2202]

@@Thejoshrandall ummmm no. I know what you are going to say

[@siddharthsantosh6608]

TREY, I thank you for being a scientific channel on KZbin! You're vids are amaaaaazing! and are an insight into the much obscure and unknowns of Paleontology, also, THANK YOU FOR INTRODUCING ME TO GRAVITY FALLS via your theory videos! keep up the amazing job!

[@odiadonervo1915]

I remember my dad buying me those Encyclopedias of Dinosaurs, I was fascinated by the feathered dinos so I told my friends at school about how they had feathers and they laughed at me, well who is laughing now!!

[@aaronwiley7526]

i asked my friend: whats your favorite dinosaur. he said that he has always loved the pterodactyl. i ruined his childhood by saying that pterosaur weren't actually dinosaurs.

[@rosegoldhiips]

i remember when i was like a freshman in high school, i was staring at a poster of a t rex skeleton in the library and i noticed that it had a similar part of its pelvic bone structure to that of the Thanksgiving turkey i helped my mom carve and that was my first time thinking huh... i wonder if birds are the descendants of dinosaurs.

[@historynerd2373]

@Harry Porter not everyone reads about paleontology regularly and they might've been a freshman at a time when it was as common of a theory.

[@cmkosemen]

So proud to have incepted All Your Yesterdays... Thanks to everyone for the extra downloads...

[@TREYtheExplainer]

+cmkosemen Awesome!

[@dinoal188]

3:26 That guy does look awesome.

[@IISMZ]

In my opinion, it looks like a lizard with feathers glued on

[@dinoal188]

Saul Zaragoza what does?

[@IISMZ]

dinoal188 That picture of Tetrapteryx

[@jamesoloughlin8268]

+Z no he meant the human

[@foisopracurtir6389]

@@IISMZ To me it looks like Archeops from pokemon

[@thatswhatshesaid2777]

3:41 I read somewhere that the tetrapteryx was part of a speculative transition between birds and dinosaurs called “Proavis” Also, I like how in Fantasia that four winged reptile is officially called an “archaeopteryx” but looks more like the tetrapteryx

[@moniquetyrell5972]

I love your videos, I always learn too much!!! Thanks trey :D

[@MetalSonicProduction]

Always love seeing your vids in my sub box, keep up the great work! Wish you the best of luck! :D

[@m.w.5972]

Okay. Here's my prediction. Given how much our view on Spinosaurus has changed over decades and that we lately found out it probably lived a hippo lifestyle, floating lazily in water and descending into water to feed using his very dense bones, here's my prediction: what if the sail on spinosaurus' back was not a sail but a boney structure to hold big leathery flaps of skin that turned into air sacks like balloons when spinosaurus wanted to float and chill and that deflated when it wanted to descend?

[@TroodonJesus156]

can you make a video that tells us "were dinosaurs good parents"

[@MrJakeKale]

I'm going to make a bold prediction right now - a fully-aquatic spinosaur. When it's discovered, you may name it _Thalassospinus kaleii!_

[@TheHedgehogEnthusiast]

Man, you are definitely a time Traveller

[@thatswhatshesaid2777]

I hope someone finds a dinosaur that truly could fly instead of gliding

[@above7793]

​@@thatswhatshesaid2777birds are dinosaurs and they evolved during the Jurassic so, you have flying dinosaurs at the time of dinosaur dominance

[@Directionless.Sponge]

Can we just call this branch of speculative evolution/biology speculative paleontology? Because the fact that this is that big of a phenomenon means that it deserves to be called something better than "speculative biology of the past that ended up being true"

[@AntiCaesarReal]

WAIT! I drew a four winged prehistoric creature before watching this yesterday, COINCIDENCE? I THINK NOT

[@ButterflySeraph612]

My boyfriend is LOVES Deinonychus (and it's a miracle I consistently spell that right every time) and Jurassic Park. He was the person who told me that the velociraptors in Jurassic Park were deinonychus, and after doing a Wikipedia deep dive (as one does), I learned that John Ostrom himself was actually consulted by Michael Crichton, the author of the original book, as a basis for his velociraptor: the only reason why the name was changed was because "velociraptor" sounded more intimidating than deinonychus, which is a shame because the more I learn about it, the more fascinated I am with deinonychus.

[@verylostdoommarauder]

I find it bizarre that the JP raptors are an amalgam dromaeosaurid, they're called velociraptors, when they have the shape of Deinonychus and the size of Dakotaraptor or Utahraptor.

[@Lucyfer42]

Hi, I think you made a mistake in the video. The painting from Life Before Man in the Tetrapteryx segment was made by Zdeněk Burian, not Špinar. He was a renowned Czech paleoartist (back when there was barely such a thing, especially here). His interpretations are mostly outdated, but he still remains an important part of our scientific history.

[@adamwhitehead4677]

I have a theory! With the huge diversity of crocodilians, thier would have to exist a very small arboreal (possibly gliding) crocodilian. One small enough to regularly feed of insects.

[@pajamapantsjack5874]

“In 2015, this year..”! Oh no I’m old….

[@Gep_05]

Dude you are everywhere

[@firegator6853]

Time for my theory: Burrowing dinosaurs?

[@themockingdragon135]

One other theory that was later proven correct (though is probably less well known) is the theory formulated by Franz Nopsca to explain for the dwarf dinosaurs found in Romania and Hungary. He suggested the they were a result of an island life, which restricts the size on which such creatures can grow. He's essentially the father of the idea of Insular dwarfism. The idea was thoroughly rejected at the time, but we now know very well to be very much true, both in modern and prehistoric circumstances. I strongly suggest reading about Hateg Island, the prehistoric island he discovered, because it's super cool. The apex predator of the island in particular is probs one of my favourite parts.

[@xCanadensis]

Yay!! A video covering Anomalocaris! Great video, (as always!) I had no idea of two of these. Awesome bit of trivia about the anomalocaris, I had no idea about that tidbit! Very interesting :)

[@TREYtheExplainer]

***** Thank you and will do!

[@xCanadensis]

Thanks so much :D I'm so glad I found your channel :) Definitely one of my favorites now!

[@TREYtheExplainer]

***** Awesome! You just made my day ^^

[@xCanadensis]

Aw c: I'm honored I could do that for you then! Any paleontology nuts are of utmost importance :D

[@TREYtheExplainer]

***** No prob!

[@mz9791]

I recommend that you do a video on the future is wild I loved that documentary/cartoon when i was ten.

[@TREYtheExplainer]

Raptor King I can do a video on future evolution ;)

[@deffonotdio6751]

TREY the Explainer plz do I think it is an interesting topic

[@staceyflores899]

Every now and then their paleontology theories seem to fit, but I noticed you didn't cover all of their predictions that were later overturned. Which is about 80 percent.

[@yanuchiuchihaanimegamesand3907]

I predict that Spinosaurus is: The long legged is a semi-water version, short legged is an almost full-water version. [10 years later] theory prover right with the discovery of the full-water spino

[@SPACE.KITTY.]

Just wanted to let you know that I always look forward to your paleontology videos. :)

[@TREYtheExplainer]

vegheadification Thanks, I am making dimetrodon paleo profile soon

[@SPACE.KITTY.]

Can't wait!

[@Frank1e.b0i]

Trey, thank you so much for these videos, i rediscover my love for science and biology through them, i feel like a kid learning

[@mrdogscratch]

I understand that you are using the term that would make the most sense to the most people but to avoid furthering scienctific illiteracy you should use hypothesis instead of the word theory. It makes people think it's okay to say "It's just a theory."

[@brooklynsbaby4367]

ye wish he loud at least clarify it :(

[@timothymclean]

7:20 is the worst. Ugh.

[@ijerry7511]

A PALEONTOLOGY THEORY THANKS FOR WATCHING

[@Misanthrope1346]

Was looking for this comment

[@gluteusmaximus8881]

I love your videos and would be glad about a Paleo Profile on cameroceras. It one of my favorite prehistoric animals! :D

[@Synthose1]

I’m making a book of dinosaurs and I’m going to speculate like Extinction raptors, Pterosaurs acting as plovers with Tyrannosaurs, Pack Hunting Raptors, Wading Pterosauds

[@anthonymagkno]

Hail Yi Qi

[@karndrogo]

Which one the girl or dinosaur

[@storm-id2yy]

Karn Phutanate The girl obv

[@anthonymagkno]

The dinosaur

[@mattsclaynation7881]

PVPlayer the real Yi Qi img11.deviantart.net/41ab/i/2015/119/d/3/yee_qi_by_chrismasna-d8riumd.jpg

[@rowanhodges2651]

+Jedd Makes me laugh every time I see your comment. 😂😂😂😂😂😂😂😂😂😂😂

[@Socksshoesandhats]

Ooh! Could you please make a video on the future is wild???

[@yerduf]

I Love your Dinochannel, thanks for the awesome videos

[@MaryAnnNytowl]

I had read about one of these (the 4-winged dino), but 3 were new to me, so thank you! Really cool!

[@IReallyLikeTreessmileyface]

Fucked me up when he said "2015, this year" yea I wish

[@SoulDelSol]

Im almost 40 and have been taught my whole life about dinosaur feathers. As you've pointed out with your depictions from 1980s and earlier your reporting on this as if it's something new and different but i thought it has been established and accepted for decades

[@SoulDelSol]

I mean how are those older paleontologists' theories any less real and less valid than current paleontologists' theories that say same thing (who no doubt build on their predecessors)

[@ivane5110]

I'm old enough to remember when dinosaurs "were" featherless lizards, Pluto was a planet and robots were just fiction. Hmmm, wonder what else is gonna change?

[@wetube6513]

Flying T-rex will be real

[@canethevelociraptor501]

"There is a possibility *all* dinosaurs were feathered" Borealopelta, Triceratops, Tyrannosaurus, Edmontosaurus, Multiple Sauropods and many others: Am I a joke to you?

[@wetube6513]

T-rex did have feathers, only a very small portion of it only on the head.

[@Eckendenker]

This is exactly what science is. Using knowledge and data to extrapolate, make predictions and then check if they are true or not. Great stuff.

[@abegamers7304]

IT WAS TRUE THAT OWLS AND BASKIBG SHARKS BUYLLED TREY

[@ananden.r9065]

After watching some videos about dinos I'm getting recommendation from this channel and im impressed at the mic quality.

[@dinor4mp4ge9]

I've been reading all of my dinosaur encyclopedias,watching you and other dinosaur enthusiasts,reading vlogs and much more...

[@cobieschannelwhichisawesom8640]

I think your videos are truly amazing

[@TREYtheExplainer]

thank you :)

[@gelinrefira]

These predictions were great because the people who made the predictions used well-proven fundamentals to extrapolate their predictions. In hindsight, it is perhaps not surprising that these predictions turned out to be true. But to make such an ingenious insights require strong foundational expertise on a subject topic. This holds true for all sciences and really, all human works. Professionalism counts, expertise counts and not all opinions are created equal. Some opinions are better than others.

[@jag2582]

Hey man, love your videos. Are you still doing the paleo profile series? Because they are awesome..

[@TREYtheExplainer]

jag2582 Thanks

[@ThornEternal]

“Lol it would be funny if nature made something this crazy, and quirky” Nature:”hold my fucking beer!”

[@Gabuun.P]

I'm 24 years old now and still crazy about dinosaurs lol every time someone would ask in my childhood what i wanted for my birthday, i said that i wanted a dinosaur encyclopedia xD i remember seeing one that was very old and had a t-rex with scales and i kept imagining him with different skin instead, like feathers or normal skin or fur and i always thought he would've looked dope if he had some feathers :3

[@gwyndor4744]

Great video again! Btw. was this an allusion on Traheripteryx? ;D In fact Dougal Dixon is the same person as Blendin Blandan xD

[@CarbonKnights]

That background music is awesome, and so was the video!

[@najlakahla8075]

Do you have schedule of when you upload videos or not?Also, great video as always!

[@Mrpawsum2]

hey Trey, I'm a big fan of you, my dad and I enjoy watching your vids every now and then. I was just wondering if you could do a video explaining the qualifications an organism must meet in order to be called a dinosaur. thank you!

[@TREYtheExplainer]

Mrpawsum2 No problem! Thank you for watching!

[@Mrpawsum2]

TREY the Explainer thanks for making quality content! I hope the whole transition thing does well :)

[@TREYtheExplainer]

Mrpawsum2 Thanks man! Its been alright, not too much time to make a video, but I'll definitely make a video by the end of the week. ;)

[@Mrpawsum2]

Take your time :D

[@shanerooney7288]

+TREY the Explainer, that "what is Dinosaur" video. Is it still in the works, or did I miss it?

[@ahmedrashid1949]

Do a paleo profile on baryonyx

[@Thefifthpacmanghoststinky]

I’d like to see a 2022 update vid on some interesting paleo discoveries from this guy

[@f.u.m.o.5669]

Also when David Peters found the head of a Langobardisaurus before the skull was found, and it's skull is damn similar to the new specimen's.

[@thejurassicman661]

can we have the next paleo profile about Megalania? I'll still wait for another two months if I have to. also I love dinosaurs.

[@SomeGuyandHisHerps]

Dinosaur Kingdom It's coming.

[@jeffreygao3956]

The JurassicMan Varanus priscus!

[@martink9701]

@@SomeGuyandHisHerps still waiting

[@pammylammyd]

Can you please make a paleo profile about Estemmenosuchus?

[@mastermindcow6210]

Avocado-like fruit-bearing trees with spiky leaves. Those plants could have depended on large ahzdarchid pterosaurs to disperse the seeds (their beaks wouldn't have been harmed by the prickly plant, and the extra nutrients could have aided them)

[@customsongmaker]

Julian May also wrote an epic science fiction fantasy series called The Pliocene Exile. It's really good, and she drew upon her decades of experience as a writer of encyclopedia articles.

[@diobrando6868]

3:42 Damn Trey, we all know that you love traheripteryx.

[@fleur5782]

koichi brando

[@brunobucciaratiswife]

Meanwhile my dad thinks we lived alongside dinosaurs and the world is only a few thousand years old

[@dougthedonkey1805]

You’d be disowned if he caught you watching Trey’s videos

[@-mederick-5252]

Awesome video , like always ! :)

[@TREYtheExplainer]

-Markus- Thank you!

[@iTzNikkitty]

I think it's possible that some of those dinosaurs with membranous wings may have gotten bigger and went up in the food chain. Raptor sized predatory dragons perhaps?

[@appleater787]

These are actually just a bunch of decomposed basking sharks

[@nicholasbrandon8463]

I have a theory, you know the yi qi, that "dragon" dinosaur? I think there might be more dinosaurs like it! Some might have evolved to be as large as velociraptor, or even deinonychus. I get this theory from how microraptor and velociraptor are both in the same family of therapod dinosaurs and both have feathered "wings". This could also be true for yi qi.

[@TomskyB]

I think it's pretty much inevitable that another yi qi-type dino exists.

[@HadrosaurHero]

TREY the Explainer Have you heard of the game Prehistoric Kingdom? It's a zoo building tycoon game that features prehistoric life from the Cambrian era to the Ice Age. This game features feathered dinosaurs, accurate depictions of animals, and it's fair share of speculation. (example: Nyctosaurus has a sail on it's crest that folds up normally but during mating season males can unfold the sail for display)

[@filippaustralovenator6368]

Keep up the good work TREY.

[@SpencerShadley]

That's not what "theory" means in the scientific community

[@heckc]

who are you??? mr dinosaur??!