The Whale-Sized Dinosaur That Used To Roam America

[@Dave-gq2eu]

RIP Dinosaurs. Can’t believe it’s already been 66 million years. Gone too soon. Never forget

[@Lohanujuan]

I for one am glad, I don’t like 6ft long centipedes

[@danishzulkifli]

​@@Lohanujuan That was a species of I think it was either millipedes or centipedes, it lived on the Carboniferous, not the Cretaceous.

[@KWillo]

At least we have birds to remember them by.😂

[@Misterlongo170]

Rip James Earl Jones. Can’t believe it’s already been 1 day. Gone too soon. Never forget.

[@sephikong8323]

RIP Anomalocaris. You were a real one. Hard to believe it's already been 500 Millions years since your passing

[@charlesmartin1121]

I remember when I first learned there was a giant Sauropod still around in the time of Tyrannosaurus and Triceratops. It made me beyond happy.

[@hypn0298]

It also makes me think of when WWD originally stated that sauropods went into decline after the end of the Jurassic and died out during the Cretaceous, which was certainly far from the truth lol

[@justinadonis1453]

Same! I thought they had went extinct by then.

[@Rexington]

​​@@hypn0298I remember dinosaur planet in the Alpha's Egg episode. They said there was no sauropods in the late Cretaceous of North America. But a few survivors left in South America. So much changes within a few decades of discovery

[@charlesmartin1121]

@@hypn0298 I should have said 'still in North America.' As there were Sauropods a plenty in the rest of the world.

[@charlesmartin1121]

@@Rexington There is no doubt that the Late Jurassic was the golden age of Sauropods in North America. But that is not necessarily the case for the rest of the world. For instance, the Cretaceous of South America (and much of Gondwana) could definitely be called a golden age of Sauropods, and Titanosaurs more specifically. With the largest animals to ever walk the Earth. And thanks to South America (in the mostly likely circumstance) for providing North America with a Late Cretaceous giant of our own.

[@kerianhalcyon2769]

I've got a weird theory about these guys I've been wanting to share, I'm actually wondering if when large sauropods die they could produce the equivalent of "whale falls" in deep oceans, except on land. They're huge animals with a ton of meat that can live for significant periods, and are nearly impossible to kill or hunt once they reached a max size threshold. Perhaps whole communities of carnivores just followed them around and specialized on consuming sauropods that died of natural causes since just one animal could feed a ton of predators for months.

[@DaDoubleDee]

I'd say that's a high possibility, but I wonder how many were in a herd or a pack that warranted predators to follow them. We see wolves follow large herds of buffalo or reindeer, but the herds are massive and the wolves are few in comparison. I think if one Alamosaurus dies, it'd warrant a group feast but only for the carno's near enough to smell it.

[@giantlactismid5704]

Imagine how they would explode after dying

[@antonbrakhage490]

They certainly would have been heavily-scavenged. Followed? I don't know, but I could see it. They'd provide a massive amount of low-effort meat.

[@RealElequist]

Probably. Carnivores in Africa do this with elephants

[@kerianhalcyon2769]

@@RealElequist That's kind of what I was thinking too. Other than humans the only animals that have successfully ever hunted an elephant are lions, and there's only one pride known to be able to do it and they exclusively hunt juveniles or young adults - at a certain point elephants are just too big to actually be able to safely take down. The only way they can take advantage of all that food is to just wait until one dies naturally or by accident.

[@adamtruong1759]

Suddenly, the size of that Alamosaurus skeleton in the Jurassic Park visitor center compared to the T-rex makes so much sense.

[@evodolka]

I always thought that skeleton was a brontosaurus

[@dogdog357]

​​@@evodolka That was like... the only popular sauropod at the time, so...

[@evodolka]

@@dogdog357 that and Brachyosaurus, and maybe Diplodocus

[@homeygfunkoffacherryfruitl4971]

@@evodolka *me watching youtubers flock to correct eachother on irrelevant points:* "They DO move in herds..."

[@TheGreatestJediOfAllTime]

@@homeygfunkoffacherryfruitl4971 fr

[@RaelNikolaidis]

Adding spikes instantly ups the cool factor of anything. I’m loving the spikes down its back. Fully endorse the spikes. 😊

[@em1osmurf]

it's been suggested in the later years that sauropods got so large, that they were nearly unkillable, and carnivores (tr) more or less treated them as "traveling meals", snacking on them but not killing them.

[@whitedragoness23]

I would think they would salvage the remains if one got sick, injured or passed from old age. I’m not sure how one can nibble on a living giant and not get a good smack.

[@Cdr2002]

@@whitedragoness23especially with the giant whip tails and crushing feet

[@sskuk1095]

"Indicating their tales were quite active, so to speak"... Now I cannot get the picture out of my mind of an Alamosaurus wiggling it's tale like an excited dog!

[@AmadisLFE]

well, it's, tail, actually.

[@amyb.6368]

Remember the Alamo! ...wait, wrong Alamo.

[@charlesmartin1121]

'Can't ya remember anything?' "I remember the Alamo." 'YEEEHAH!' (from "Pee-wee's Big Adventure").

[@mikes5637]

Still an epic final stand.

[@Andreas_42]

Was Alamo sore after the fight?

[@roytard12]

@@Andreas_42 ALAMOSAURUS

[@paleoph6168]

Remember the Ojo Alamo!

[@Coldstone-Jay]

I love dinosaurs

[@evodolka]

Who doesn't 😆

[@Hugo-yz1vb]

​@@evodolka Boring people

[@evodolka]

@@Hugo-yz1vb 100% agreed

[@chelicerate-o3n]

Hell yeah

[@Tenerens1s]

man u and me both‼️

[@sirblack1619]

The Alamosaurus was amazing along with other sauropods! I am glad that they are getting their due in the spotlight.

[@mhdfrb9971]

Native to the southern edge of North America, this colossal Titanosaur was the first confirmed sauropod found on the continent after a nearly 30 million year absence. It's taxonomical placement in the Titanosaur clade is controversial, with various hypotheses ranging from it being a Saltasaur that evolved gigantism to being the last of a sister lineage to the Lognkosaurs. Found in the Javalina and Ojo Alamo formations, fossils belonging to T. rex have been found in these deposits as well. In fact, they have found T. rex teeth in association with Alamosaurus vertebrae. Due to the fragmentary remains, it's cannot be ascertained as to whether scavenging, predation, or the natural process of time was involved in the bone placement, but it's possible that T. rex preyed on younger juveniles, which would've still been in the range of African Bull Elephants and Columbian Mammoths, with the adults and subadults being too large for its rather limited jaw span to accomodate.

[@JonS]

So now we know how Quetzalcoatlus got airborne. They climbed up the tail, along the back, up the neck, and then leapt off the heads of Alamosaurus 😆

[@TheMagnaknight]

4:01 these are cervicals, not caudals. Caudals are the tail vertebrae

[@thhseeking]

I was wondering if anyone else picked that up. Not many have.

[@xanshen9011]

The alamosaurus couldve been the top contender for the largest creature during the time of the extinction

[@tayzonday]

That muscular build makes it look like The Rock as a dinosaur

[@Doubledutch23]

How you doing these days Tay??? Just seeing your name brings back nostalgia! I hope you're doing well!

[@byzantineroman2407]

"Tay likes dinosaurs." Noted.

[@The_Galactic_Empire_Offical]

Yo its tay 🔥🔥🔥

[@EwanCumia]

If ya smell what the Alamosaurus was cookin'!

[@eastwaters4082]

It’s the Tay Man himself.

[@alexbowman7582]

It's possible that dinosaurs didn't stop growing throughout their lives and great sizes were often terminal leading to the animal eventually being too big to survive, often leaving large bones indicating their end life sizes. It's a bit like future intelligent creatures examining human graveyards and coming to the conclusion that humans were typically bent, unwell and athiritic.

[@YasukeUchiha]

It’s crazy the earth really had tailed beasts walking around at one point

[@IndyNDYT]

3:00 has gotta be the most phallic dinosaur I've ever seen.

[@JustASleepySloth]

Please put credit to the dinosaur footage and art shown on screen, not only for the artists but for people like me who want to watch the documentories those clips are from.

[@Lotsabubbles]

I know the video at 5:00 is from a channel called Dead Sound. He makes animated short films including a series that was about dinosaurs

[@TheGreatestJediOfAllTime]

Bro we dont want to see text on every clip and picture, what a dumb request.

[@JilynnFurlet]

@@TheGreatestJediOfAllTime Why would it have to be on screen? Placing them in the description below the video with reference to the time in the video they show up would do just fine.

[@icecreamnoodles3742]

​@@JilynnFurlet True. Would be nice. Though that would be a buttload of work ngl.

[@leeweesquee]

​@@TheGreatestJediOfAllTime you never studied. Arts degrees don't count

[@sully8754]

If i remember right there was a few bones from one alamo who was a little over 100 feet long. Would be amazing to see something that big walking around

[@vladline1882]

Sauropods supremacy in Mesozoic is outstanding. From Triassic to Cretaceous. My favorite Dinosaur

[@SSPB300]

danm, nothing like watching a ExtinctZoo video then going to bed right after.

[@thehallway4228]

4:22 'Bony Scoots' is gonna be my rapper name

[@oscarstainton]

I really hope we get more fossil discoveries of this amazing sauropod.

[@marcpaulus6291]

I mean a Alamo Baby would be a pretty good snack for a Quetzal.... and the Alamos could give the quetzals enough time to lift up when predators aproach

[@luisa.acevedo3326]

I thought the same thing. Hatzegopteryx hunted pigmy sauropods on Hateg Island.

[@Albert-VincentPaquin]

This dinosaur caused the ending of a 30 millions years sauropod hiatus in North America!

[@outthewayna4407]

Whats up Extinct Zoo. Love your vids, especially when your highlighting underrated animals in grave detail. I had a video request. You think you could make a video on Pleistocene Jaguars, Like the Ancient Modern jaguars that were bigger than their modern Descendants or the extinct species like the North American Jaguar P. Augusta or the Giant South American Jaguar P. Mesmebrina. Definitely would be awesome, Ancient Jaguars in my opinion were definitely contenders for some of the Largest felines to have ever lived and their is so much interesting history behind them, like how they’ve been confused with american lions or could possibly be the american lion “allegedly” Or How their were some of the closest Analogues to Smilodon as they too were big robust almost bear like cats. Would definitely appreciate if you could respond. Keep the great content going!

[@AmericanMephistopheles]

Rest in peace Long Boi 😔

[@RealBelisariusCawl]

8:35 If those individual stones could only talk…

[@ca8e8ac41]

Sauropods are my absolute favorite. I wish i could see one alive

[@nationalsniper5413]

Considering you do not want to be on the receiving end of a green iguana tail, imagine the power of a sauropod tail!

[@GraniteGhost778]

Alamosaurus mentioned! Yes! My guy is getting some love!

[@PrehistoricMagazine]

I also run and publish Prehistoric Magazine three times per yr. Congrats on this channel. If for some reason you might like free ads for this KZbin channel in the upcoming sept issue let me know. Mike

[@jurawild]

This text describes the Alamosaurus, a massive sauropod dinosaur that lived during the Late Cretaceous in North America. It highlights the discovery and naming of the dinosaur, its size, comparisons with other sauropods, and its classification within the Titanosaur clade. The text also explores the Alamosaurus' habitat, coexisting species, and its significance as one of the last dinosaurs to survive until the K-T extinction event. It emphasizes the dinosaur's robustness, potential defensive capabilities, and its legacy as one of the largest terrestrial animals ever.

[@marsh2537]

Love the art you used for the thumbnail

[@ChrisFixedKitty]

Really active tails? So, like happy-dog active? How do we eliminate the possibility that tail damage might be from clumsy or balance-maneuvers, like the tail whacking into trees and rocks while dealing with a challenge in terrain or slipping in mud? The jump to damage = battle is so automatic in paleontology, but how do we know?

[@SmashBrosAssemble]

Probably the only animal Tyrannosaurus wouldn’t hunt.

[@The_Man_Of_Steel_69]

Ankylosaurus too I guess

[@penguinlord6098]

A triceratops in its prime, bull edmontosaurus, a particularly pissed anky would all be too much for a rex.

[@oscarstainton]

Adult specimens, certainly. Younger ones, however, were more appropriate.

[@wildlifeisthewealthofnatur5457]

Alamosaurus, Triceratops and Ankylosaurus all were out of scope of T rex.

[@threezus7740]

​@@penguinlord6098 you're 100% right, but that also kinda goes without saying. Predators will almost never choose to go after prime physical specimens unless there are some special circumstances.

[@redguirus]

Alamosaurus is my favorite sauropod...especially Jurassic World Evolution's rendition. ❤

[@JeffBilkins]

The bony plates and tall strong back would make a fun perching structure for the Quetzals. They could ride along for protection and fly to spot risks and opportunities.

[@baneofbanes]

Quetzals almost certainly couldn’t perch.

[@ExtremeMadnessX]

​@@baneofbanesNot like bird.

[@nationalsniper5413]

Ankylosaurus: I have armor to defend against predators. Argentinasaurus: I have my size to defend against predators Alamosaurus: Hi there, what are you guys talking about?

[@Shadeem]

Having a giant sauropod stomping around likely would drive other animals out of hiding which is what quetz prayed on

[@crab6334]

My theory on the possible connection between this sauropod and quetzalcoatlus is that since the sauropods are such an imposing force on anything when walking, they probably regularly flush out smaller creatures from bushes. This allows the quetzalcoatlus to get free meals as the sauropod is walking. They also probably eat small scavengers that try to eat the dead sauropods. I personally think their beak is too long and thin to exert enough force to scavenge huge dinosaurs effectively.

[@Guitar387]

9.08 was breathtakingly beautiful

[@HiHelloIAmAri]

Grate thumbnail . Fr got my attention

[@RicardoMagnon]

Amazing video!!!!

[@vickilindberg6336]

Just imagining that tail turning on a T rex & just doing one good swack! Please include the confrontation in the next Jurrasic Park kind of movie.

[@bernardedwards8461]

I dont believe Alamosaurus and Titanosairus sometimes stood on their hind legs, on the contrary it is likely that they often waded half submerged in rivers and lakes to take the weight of their legs and browsed from the bank. But how did they drink? We all know that water doesn't flow uphill and we all know Titanosaurus and similar dinos had to drink. How did they force the water to travel up their immensely long necks to a height of 16 feet? One way to do it would have been to take a large mouthful of water and raise their heads above the horizontal, then gravity would pull it down into their stomach like it does with us, but that seems a very laborious way of drinking. Of course, if they were standing in 12 feet of water thery wouldn't have far to lift it.

[@bigred8438]

Given its massive size and extraordinarily long heavy looking neck, is it likely to have spent most of its time in deep lake water?

[@ExtremeMadnessX]

Nope.

[@LavaDracovania]

As a southerner, I knew about Alamosaurus the whole time. But never knew why Alamosaurus was not included in dinosaur documentaries. I originally guessed because it was medium sized sauropods are shunned by scientists. When alamosaurus was discovered to be a giant sauropod. My first thought was, “was I right?”

[@JacobBartlett-mh4xy]

I LOVE UR VIDEOS ❤! LOVE FROM ENGLAND ❤❤

[@George_Tropicana]

They’re so cute! 🥰

[@_Alov_]

9:45 We need an "Ojoshitosaurus" too

[@umamizaddy]

Alamosaurus was probably the largest and most evolved sauropod. Truly fascinating!

[@countchompula1896]

Sauroposeidon still under the radar 👀

[@charlesvasseur4253]

Can’t believe you didn’t show the whole clip of Godzilla throwing an Alamosaurus on the beach lol.

[@ChargerusPrime]

Quite honestly, I think the reason why we don't have much of a record of predation is because sauropods in general are rare in the fossil record. At least in most cases, the Morrison formation is a spectacular exception and a blessing at that. The fauna of Hell Creek is also much different as you very much so know to that of the habitat of Alamosaurus. And with the paper suggesting dinosaurs could have gotten even bigger than we thought, Tyrannosaurus Rex included, that means a specifically adapted sauropod hunting Tyrannosaur might not be so far fetched. T. Rex had a 6 to 8 ton bite force. ANYTHING that gets bitten by that will have a broken bone on impact. With as intelligent as rexes have been shown to be in recent studies, they could absolutely have formulated attack strategies to take on sauropods especially younger ones or old, sick or injured ones.

[@charleneblake1146]

I'm still awed that these creatures actually roamed around the continents back in the day🎉🎉🎉

[@kylejefferson1547]

You should do a video on when the first dinosaur bones were found🤔🧐

[@aum3.146]

Oh, to see these creatures live and close up.

[@sophroniel]

these are so large I am struggling to even conceive how gigantic this was.... absolutely bonkers

[@forcommentingpurposesonly2918]

9:38 why does bro sound like hes reading out his patreon subscribers

[@Zopzap]

I just noticed

[@dartmart9263]

Remember the Alamosautus!!!

[@EduardQualls]

@10:50 "an end that should have *came"* => "should have *_come"_* The principle parts (present, simple past, past participle) of "to come" are *_come, came, come._*

[@HannahHäggAutisticTransWoman]

Alamoasaurus is such a cool dinosaur. It's one of the biggest dinosaurs ever found and it lived in north America and in the late cretaceous the same time as tyranuarus did.

[@potato1841]

Ur a man

[@Bopig]

39 tons holy godamm

[@ricardoaguirre6126]

My favorite sauropod.

[@mimimarcus]

It only makes sense that the land of the biggest carnivorous dinosaur also houses the biggest herbivorous dino ever.

[@jonhlesaurien]

You forgot to compare Alamosaurus with another contender: Sauroposeidon

[@abdulazizrex]

7:16, I have never heard of this so called “sauropod hiatus”!

[@davideostudio2664]

We need more Alamosaurus representation in the media

[@brandondavidson4085]

I always feel like it's weird to see paleo art and AI videos of dinosaurs in hot, sandy deserts. You don't normally associate deserts with giant lizards, or really any big animals.

[@bigshorty4855]

I read the book about the battle of a triceratops and t rex back in the 80's in grade school. It had evidence, as in bones and damage. While the t rec kept biting trying to get better bites in on the triceratops back, it was getting stabbed deeper by it's horns. T rex was stupid beyond belief.

[@jimlawrence7758]

I think small raiders of nests were the reasons of its decline.

[@AncientWildTV]

when Alamosaurus was found, it was initially mistaken for an Apatosaurus but further study revealed that it was a new genus of sauropod right?

[@thatonemonkey.]

I love dinosaurs

[@user-McGiver]

make a video about when the marsupials migrated from [what is now] S.America, through Antarctica to Australia... when those three land masses were connected...

[@josedealva4205]

why dont you make it?

[@hardyakka6200]

They make good pets though, but never let them jump up on you.

[@andresdeleon5160]

I love this dinosaur

[@rageskingdom8834]

In the one image the Alamo kinda looks like vhegar from house of the dragon. The image when it is seen either attacking or defending itself from a t-rex

[@biluroy2666]

Please make video about trex

[@mikes5637]

There's already dozens on YT. I prefer to see videos on lesser known species.

[@hybrid_theory990]

Great vid and excellent information on an underrated North American titan. Though I would classify Alamosaurus as “one” of the largest animals to live in North America known from decent remains. Fragmentary wise, Maarapunisaurus is estimated to be an average of 85 tons and even the larger Brachiosaurus specimens probably pushed over 50 tons as of recent estimates. Alamosaurus was definitely the largest sauropod from Cretaceous North America.

[@william3100]

I've also heard that barosaurus might've been exceptionally large, too.

[@jodebever]

My respect for alamo📈📈📈📈

[@aleague23]

Narrator: Alamosaurus is the biggest North American Sauropod. Maraapunisaurus, Brachiosaurus , Barosaurus, Sauroposeidon: hold our beer. Top 5 biggest North American sauropod 1. Marapunisaurus- 80 tons 2. Brachiosaurus- 73 tons 3. Sauroposeidon- 56 tons 4. Barosaurus- 53 tons 5. Alamosaurus- 40 tons

[@Stefan996]

are you saying averages? because the guy said the biggest alamo would've been 88 tons

[@Ozraptor4]

Largest Barosaurus specimen is probably Supersaurus (as originally identified)

[@userbosco]

Charles Gilmore AKA Bela Lugosi

[@maanking9923]

Alamosaurus is 51.5 -80 tons that makes it the second largest animal in North America Number One is Maraapunisaurus 89.26-130+ tons

[@Albert-VincentPaquin]

I love the alamosaurus

[@jurassicswine]

Alamosaurus is my favorite dinosaur :)

[@gamerkhanofficial]

Can you do a size comparison between Real life dinosaur and famous dinosaur game ARK

[@DereksThoughts]

We need to bring these bad boys back

[@rosshugecaulk]

What is y'all's favorite but more obscure or unknown dinosaur? I wanna learn more about the unknown guys, they deserve love too.

[@SSPB300]

majungasaurus

[@NaluLagiacrus]

Threrizinosaurus is my all time favourite dinosaur! But Australovenator is my favourite more obscure one. And while not a dinosaur I also love kronosaurus 🥰

[@Stefan996]

Titanovenator the African 40 foot Abelisaurid

[@DakotaofRaptors]

​@@SSPB300mine too

[@asilva781]

I read somewhere the biggest North American dynosaur was the vergasaurus sp.

[@Mazed927]

Just casually existing as an actual living battletank. Literally took the K-Pg extinction to bring it down.

[@Meme-penguin69]

Extinct zoo will you do science videos on movie dinosaurs?

[@gtracer6629]

Scoots or armor on the back would probably be useful for for the young but a waste on the largest adult. Armor on the lower part of the body would be more useful to them since T-Rex could not reach the back. Theropods could attack the lower part of the body and then wait for the animal to bleed out .

[@philochristos]

Alamosaurus is cool.

[@JPOG7TV]

I didn't think this was a real animal simply because of the sauropod hiatus and how older documentaries made it seem like none of them survived into the Cretaceous. Wild to find put years later that sauropods only got bigger!

[@nathanjordan1782]

There’s a very good chance that we just don’t have the fossils. Think about how much has to go right to get a single fragment of a bone preserved and then discovered by humans who can actually study it properly. I wouldn’t be surprised if the dinosaurs we know about are less than 10% of the actual biodiversity of their eras

[@barsnacker]

I thought you were talking about seismosaurus

[@JosephThirkell]

So all those times as a kid I played with my T rex’s and other cretaceous theropods attacking my sauropods, it actually happened

[@IaMaPh1991]

4:01 Did you mean to say "cervical" here or are the visuals just wrong?

[@abdulazizrex]

2:39, why do you only bring up its shoulder height and not its head height?