Added: 1 year ago
From: Mrjohn5533
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  • 0:11 awwwwwwwwwwwwwwwwwww

  • Even all these "experts" who criticize each other have no idea at all of what happened with these creatures. They only have bones and their big Steven Spielberg imagination to brag about stuff because they have their PhDs. Paleontologists are like Teologists: the have a "science" built up on beliefs more than facts.

    And the poeple here is even worse, because at least they have a PhD on something that they studied.

    You guys know only Hollywood crap. So STFU. Talk about football or baseball.

  • @SomeoneCommenting Even Spielberg's beasts made more sense.

  • I remember growing up watching this at early 2001. Looking back at it as an adult, wow do I real retarded just for glancing at it too long. This really makes zero sense and as a kid, I didn't even noticed such dramatic lacks of consistencies with excruciatingly bad info. This wasn't even a good documentary series to begin with and we are all aware of the fact it was forcefully canceled half way because of such debacles. But, 2001 was a very long time ago.

  • Wow... 2001 was a bewildering day for paleontology due to this... it's why it was canceled half way in the first place. 10 years was a long time ago.

  • It's staggeringly alarming the amount of gullible kids who believe whatever terrible illogical 10 year old documentary tells them without question nor the intellect or education to differentiate realism and dramatic laws of physics breaking assumptions basted on nothing but blatant opinion that has zero evidence to even slightly prove it and is entirely contradictive to itself...

    It's a testament to the lack of education in our planet's civilization -_-

  • @elmersglue82 Ok calm down with the overuse of big words, doesn't make you better than anyone else.......but I do agree with you :)

  • @daverowbotham Wow, I didn't even noticed but that was because of this. Sorry, I was typing a bit too fast and didn't even notice such a small insignificant errors.

    Also, it's "delicious" It's nice to see you are very comfortable with your fetishes to masturbate to comments but that was more than I needed to know.It scares me that there are people who have such, "conditions".

  • @daverowbotham Posting a comment with a single small error as a YouTube comment is not an indicator of how intelligent a person is. It's just a YouTube video, not a college exam.The fact that you actually believe that's the case only shows such processing debacles and actually a low intellect on your part rather than my own.

    Lesson of today: Your claims are ironic as for they are shrouded in hypocrisy. Might want to think about that.

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  • They made deinonychus appear smaller than it's actual size, it was almost three times as big as it shows in this episode

  • 0:10 OMG face :P

  • they didnt once theorize that it may also be a carrion eater like they do with t rex

  • @fielsofthenephilim It would have to eat a lot of carrion. :) But there were big walking slabs of meat around at the time so I can believe it.

  • Man, this show is so darn inaccurate! I mean, just look at that naked, featherless Deinonychus, at 15:50! (Sighs). :(

  • If I was a dinosaur, I'd be stoned all the time. Raaaaaaaa!

  • god they're so dumb, even i knew from the beginning, it attacked it on the legs constantly so it could fall down and then take it out..scientists r smart...but no common sense

  • @926531 Yes. So it's gonna attack the legs and get kicked in the face. I don't think so.

  • 0:07 I will just run strait towards it like an idiot.^_^Yeah that l work!

  • 20:03

    "Dude, stop it...that's annoying" *Bitchslap*

  • Comment removed

  • LOL at 6:33....KNOCKOUT!!!!!!!

  • why is the acro running like a 1960s trex? it is so unrealitic!!

  • Perhaps they killed the babies of the Sauropods? they could grapple with the babies or imnature offspring no problem,perhaps they worked in groups of 2-3? sauropods usualy roamed in social groups so a lone attacker is unlikely... do you see a lone lion attack a elephant? never.

    I think this beast used teamwork and usualy picked on the babies.

  • @realistromeo uh dude even in a pack lions don't screw with elephants

  • tyvm for upload

  • or mayby the footprint wore away?

  • @brennenmyers Good for you! By the way, Deinosuchus was more of an aligator, than a crocodile, but that's not the point. Point is that in my previous comment I contested the theory which says that Deinonychus pushed Acrocanthosaurus into extinction. Your reply was about Deinosuchus, so it had absolutely nothing to do with my comment. Therefore, you need to read carefuly the comments you want to reply to, because otherwise it makes you look like an ass.

  • @CrashMarioSonic The question was rhetorical. I don't have time to explain. Read previous comments if you want to understand.

  • @brennenmyers Can you tell the difference between DEINONYCHUS and DEINOSUCHUS ( not Dienosuchus, as you wrote it )? One of them is a dinosaur, the other one isn't! Can you actually tell which is which? If not, perhaps you should watch the whole show first, instead of making lame comments...

  • @Sorvos deinonychus is a raptor-like animal whilst deinosuchus is a huge 12m croc.

  • @Sorvos

    yes i can, deinosuchus= big ass crocodile that could kill dinosaurs for food, deinonychus= dinosaur push over

    oh and thank you for correcting my spelling, i have a hard time with spelling long words

  • Acro is a push over that would have gotten turned into Rex-poo if they had lived at the same time!

  • 00:12 Fatality 0-0

  • With the climate changing, the sauropods - who thrived in humid conditions - started disappearing. With their main food source gone, then Acro disappeared as well.

  • I have a hypothesis that might link to their idea on Acro's extinction. They say that during the mid-Cretaceous, when Acro lived, it was the warmest time in Earth's history. This was caused by a massive series of volcanism, which boosted the air with tons of CO2. But by the time the late Cretaceous arrived, around 95-90 million years ago, the surges of volcanism slowed down, reducing the CO2 levels, slightly cooling the planet, and shrunk the Western Interior Seaway that was present then.

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  • That walking animation looks so very wrong.

  • They totally missed it when saying Deinonychus was a threat for Acrocanthosaurus. It is highly unlikely, mainly because the size difference was just too great. A male lion stands it's ground against tens of hyaenas. Also, they hunted significantly different prey. Acrocanthosaurus's doom was most likely caused by the rapid decline of sauropods.

    Unlike Biggest Killer Dino, this episode is really great. When Philip Currie talks about carnivore dinosaurs, we better listen!

  • @Sorvos

    Dienosuchus is thought to get btwn 33 and 45 ft long and approx. 5-7 tons, thus making heavier than Acrocanthosaurus and it also was thought to steel food FROM big predators, so acro would have had to look out for a big croc, so it could keep its kill.

  • @Sorvos

    Honestly I'm surprised they didn't mention Utahraptor. It lived at the same time as Acrocanthosaurus, had all the same adaptations as Deinoychus, and was bigger.

  • @TheTomboyPresident In other words, a group of T-Rexs were just as deadly at tackling with bigger prey as a group of Acrocanthosaurus, Giganotosaurus, Mapusaurus etc. But because very large prey was almost absent during its time, T-Rex had to take down smaller prey because that's what was around. It developed a crushing biteforce as a response to this adaptation at hunting smaller but in many cases, heavily armored prey. Acrocanthosaurus didn't need a strong biteforce.

  • @TheTomboyPresident Acrocanthosaurus was roughly the same size (only slightly smaller) as Tyrannosaurus Rex, not 6000 pounds lighter. It preyed on large sauropods because it hunted in packs. The same must have been true for T-Rex when talking about taking down prey bigger than itself, like Alamosaurus, the largest sauropod during the late Cretaceous. So saying T-Rex was able to hunt only smaller prey is not true, because except Alamosaurus, there were no other bigger dinosaurs during its time.

  • Acrocanthosaurus was a 9,000-pound predator with knifelike teeth and claws that killed prey almost 10 times its size.

    Tyrannosaurus rex was a 15,000-pound predator with spike-like teeth and hooklike claws that killed and ate anything smaller than itself.

    Thus, during the Dinosaur Age, Acro was the lion, while T-rex was the Kodiak bear.

  • the acro are so cool!

    

  • why does this show repeat itself so god damn much

  • Even a T. rex skull can't withstand the stresses of hundreds of tons of bite force, it doesn't have enough room for the muscles needed to generate that much force. Let alone a Utahraptor skull! These were living animals, not fairy tale dragons - they DID have limits to their strength.

  • great stuff.,

  • That Sauropod is running way too fast. + speculation about extinction of Acrocanthosaurus (only one possible answer given, not enough)

  • @Paralititan i'd say by human standerds it was only running about as fast as an elephant.

  • its kinda funny they say trex is "weak" yet, they hav PROOF Trex was the only animal a raptor wouldn't challenge or fight, yet Acro gets his ass kicked by raptors all the time

  • @RedRex300

    The raptors in T. rex's time were puny little Dromaeosaurus, the ones in Acro's time were big Utahraptors. So the size of the raptors mattered too. Even so, there's no evidence that raptors EVER attacked an Acro. Acro still had 100x their bite force.

  • @susumu07 ok sure 100x, trex had abt 300x the bite force of acro so shut the hell up, u just made my point even more obvious

  • @susumu07 actually utahraptors where not in the same time era as acro it was deinochys they where pack hunters in groups of 5 to 6 predators lead by a male or female they where one of the smartest raptors to evolve

    and i think the only way a acrocanthosaurus could have died out was the evolution of more complex prey such as the heavily armoured dinosaurs and the duck bill hadrosaurs

  • @XjerichoX12

    You're probably right, Acro wasn't built to deal with armored dinosaurs (though I don't think hadrosaurs were so much of a problem for it.... they were just a bit too fast perhaps but not that well-defended).

    Acro's sauropod prey getting scarce was probably what did it in. That's the Achilles heel of all specialized predators.

  • @susumu07 also the acro could have had a advantage if it evolved the same time as allosaurus where prey was at it's largest quite unfortunate really. :(

  • @XjerichoX12

    Good point. Something like Acro could have driven Allosaurus into extinction. Though the sauropods in the EK were pretty big too. Sauroposeidon was bigger than any Jurassic brachiosaurs. Of course, it may have been TOO bog for Acro to take on. It was a lot bigger than Paluxysaurus.

  • sorry but 0:55 just dont make any sense |:

  • I don't think 'daspletosaurs' had anything to do with it, they were separated by at least thirty million years. You would probably have a wave of different Carcharodontosaurs and more primitive Tyrannosaurs in the meantime.

  • At least this episode doesn't have being killed and eaten like the spinosaurus and the Terror bird episodes.

    Also I think another factor towards acro's death was the introduction of tyrannasauriade maybe daspletus.

  • @BrontoSmilodon1 Very good point. Even though daspletasaurs were smaller they'd be quicker, more agile, and have that massive biting power.

  • They should've included the utahraptors in this episode - in Bakker's "Raptor Red", they and the acros fiercely competed against each other, and they were much bigger than the deinonychus, much more troublesome rivals for the acros...

  • @Junketh71 Another good point. Together with the different raptors and the daspletasaurs the acros were getting out competed by much better adapted predators.

  • YES!!! PART 2

  • NICE HD! keep it up

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