The Dinosaurs that Haunted Tyrannosaurs- Ulughbegsaurus uzbekistanensis 

My left ear really enjoyed this video, thank you!

Next : "Genghiskhansaurus"

Thanks for an interesting video. I think maybe you meant 'hunting' in the title - though it is a little fun to imagine a tyrannosaur gradually getting more and more paranoid that the ghost of an ulughbegsaurus is haunting him

As impressive and formidable as this dinosaur is, the mainstream press reporting on it has been HORRIBLE. I saw a headline that said "Tyrannosaurus lived in fear of super predator five times its size". Forgiving the fact that T-Rex was NOT at the same time or place as Ulughbegsaurus, it was 8m long! That's not 5X T-Rex size! Somehow this impressive predator will end up turning into the size of Godzilla and start farting lightning by the time it shows up in Jurassic Park!

TRex: ah finally, my new home! This dinosaur: booooh! TRex: gosh damn it Martha this house is haunted as well.

I love how you put these new discoveries in context. Great video!

0:53/2:57 I should also mention that the artwork looks somewhat similar to the Carcharodontosaurus from Jurassic Park: Operation Genesis, with the blacks and reds. Someone also did some animation on it.

So kids remember, JW3 giga vs rexy will never ever happen

If it's really true that the tyrannsaurs were the reason the carcharodontosaurids went extinct, then the tyrants really do live up to their names, haha.

There is not enough of this fossil to draw any conclusions

I like this new carchardontosaur,named Ulugh,so that's pretty awesome,also cause this channel is amazing

OK, so one is named after Timur, second after Ulugh Beg. What they will run out first - famous amirs or new dinosaurs? On the other hand Khalilsultania (definitely an ankylosaurid) and Shakhrokhozaurus (some thing middle-sized and carnivorous) will be nice names.

4:15 - 4:20 I mostly associate their extinction around the Cenomanian-Turonian anoxic event (even though that's a marine based extinction), between 95 - 90 Million Years ago.

2:27 wow that says a lot about so-SIAT-y

I don't get any of the jokes here in the comments. - So a teenage T. Rex shows up at an Allosaurus party. She is immediately set upon by a cynical allo - "Hold on a cotton-pickin (old fashioned dino talk) minute! You're not an allosaurus! Look at those arms (while small but not insignificant) - who are you and what's your niche?" - "Niche?! - "What do you eat, fake Allo?" - "Umm, other...animals?" - "Yeah? What size animals?" and the poor Teenage T. Rex spread her little arms as wide as she could - "this big, and, you know, huge carcasses with the gang..." - "That's my niche!" shouted the Allo. Then he had a change of heart from some reason. Don't ask, this was a long time ago. "Anyway, there's water in the pond and crunchy snacks...tell the Rexxes I said hi".

Yeah, but don't forget that fossils themselves form in very specific conditions making them incredibly uncommon, especially when it comes to mid to large sized animals, which means that there could be hundreds of thousands of mid sized predators at the time that just happened to not die in the required environment in order for fossils of them to be present today for us to even find. It could also simply be that there are loads of fossils that we just haven't had the privilege of finding just yet. At the end of the day, even the most educated guess is still an assumption at its core until more evidence is potentially uncovered or not.

I'm finally catching some of your many videos I hadn't seen before, and really enjoying having a whole queue of them! 🙃🙂👍 They're just... usually too danged short! 😄

I bet Mattel will make an Ulughbegsaurus figure because it would be awesome!

I don't think they're were out competed by tyrannosaurs like how do you say ,they diet out with their food, when the sauropods and iguoanodons reduced in number and diversity the carchardontosaurs fallow and went extinct ,the new prey was to different from the large game they hunted and the tyrannosaurs well better at hunting the newer prey at were the carchardontosaurs.This is my opinion may by I'm wrong may by not what do you belief is my opinion good?

my left ear enjoyed this

a new dinosaur dicovered and has the same name as me NICE

hey, not sure if it's just on my end but this video has the sound panned fully to the left. checked on some other videos and it was only happening on this one. just thought I'd let you know in case something messed up in editing! great video otherwise!

These dinosaurs were so bad, T.rex looked under it's bed at night before going to sleep!!!!

Scientists: let’s name this carnivore something no one can pronounce ever!

my first instinct when glancing at the title was "Oh those damned demons called dilos!" Me actually reading the title: oh, that sounds like a weird and cool one.

At least it's not as big, strong and smart as the Trex

Thanks for this channel!!

Great research and clear explanation!

First time here and I already love it I will sub and like the video

The notion of juveniles having their own habitat, niche and competition for prey profile makes total sense, but was new to me. Maybe that's because I follow synapsid evolution more enthusiastically, where juveniles are likely to be under mentorship of a parent or pod.

How did a carcharodontosaurid get into Asia?

Which dinosaur had a stronger bite force.

This is like saying that there was a squid that could kill an elephant, because elephants evolved from tiny, fish-like creatures, and this squid ate those. An apex predator's extinction creating an empty niche for other animals to become gigantic apex predators is an interesting event, but framing it in the context of oppression or predation is ridiculous and sensationalist. As for whether charcharodontosaurids were outcompeted by early tyrannosaurids...who knows. We know that tyrannosaurids certainly became more competent predators than allosaurids and subsequently charcharodontosaurids could ever hope to be. Their relationship resembles that of cats and dogs. Large cats (tyrannosaurids) are more robustly built, most likely solitary predators with a wide array of senses, perfect binocular vision, great sense of smell, and bone crushing bites, while allosauruses and their derivatives (wolves) were almost certainly pack hunters who specialized in a single hunting strategy, and perfected that. If there was competition, it's not really a surprise that tyrannosaurids came out on top, since they are far more adaptible. One important information - there is evidence that a sauropod sharing habitat with tyrannosaurus (alamosaurus) had armor plates. Seems like sauropods got the memo about the hit-and-run strategy of allosaurids. Don't be surprised if it turns out that charcharodontosaurids died out because sauropods developed armor.

Seems that I can only hear the sound from one side of my headset. Anyone having the same issue?

Super interesting thank you for sharing.

Hi, this is some feedback, intended to be constructive, so I hope I manage to convey it that way. 😅 First off, I thought you did a really good job of covering the topic of this discovery, as well as a lot of the background information, so, overall, I thought it was a very good video. You clearly know your stuff!! My little 'critique' is actually just with the 'pacing' and the amount of 'background knowledge' your presentation 'expects' of a first-time-viewer such as myself. I found that your pacing (your rate of speech, and also the rate at which you introduce new information) was just a *little bit* too fast for me. Since I'm unfamiliar with these Carchardontosaurs, there was a lot of new-ish information for me, and I personally felt like I had to 'rush' my brain to absorb all the information as quickly as possible, whereas it would have been more enjoyable for me to 'take a stroll' into your world of in-depth knowledge of dinosaur paleontology and related topics. In my humble opinion, if the same material were presented at a slightly slower pace -- perhaps with brief pauses here and there, or just by slowing the cadence of speech overall -- to let some of the new facts have a chance to 'sink in', and so that I can 'savour' them and 'appreciate' them, I probably could have gotten a more complete understanding of everything you covered (since my brain would have had more time to process and assimilate the information), but _also_ it would have just been a more 'pleasant' or 'fun' experience of watching the video (not that it wasn't fun or pleasant; it was!; it just could have been *more* pleasant/fun). My feeling while watching was like I was in the last scheduled lecture before a final exam, and the lecturer was a little behind on covering the curriculum, and so had to rush a little to fit all the crucial information for a big chunk of the exam into a single lecture as quickly as possible. It felt, like I said, somewhat 'rushed'. Not really that _you_ were rushed, more like that _I_ felt 'rushed', like "Oh, geez, I have to cram all this stuff quick, he's going real fast and it's all new stuff, and it'll be 'on the exam' tomorrow!" Now, I realize that a lot of this critique is *_just_* my own personal, subjective, psychological experience, and it's absolutely very possible that I'm just a random person to have felt that way, and it could be entirely due to my random, personal situational circumstances at this very moment -- maybe I just happen to be a little 'anxious' right now or something? Definitely possible, and so it might not have anything to do with your video at all -- however, I thought it might be worth reporting this personal, anecdotal experience anyway, in the chance that maybe it's not 'just me', and maybe it could be helpful feedback for you and your growing channel (and I do wish you much success in growing your channel; otherwise I wouldn't even bother giving such feedback in the first place!!) Personally, IMHO, I think this same material could have been spread out a bit more, turning a 6min 50sec video into perhaps an 8 to 10 minute video. So, like 1 to 3 additional minutes, so about 15% to 40% slower, very roughly speaking. And not just 'taaallkiiinng ssslllooowwwer', but just introducing thoughtful, reflective pauses here and there, perhaps even including additional photos or video clips you might have available to give 'the viewer' time to 'pause and ponder', etc. These are just some ideas. This video and channel format, and your in-depth knowledge, reminded me of the amazing and excellent channel PBS Spacetime, and you reminded me of that channel's host Matt O'Dowd, who I think is one of *_the_* best science communicators of our time (so this is intended as a big compliment, and also as perhaps some encouragement!). That's where I got the idea to post this 'critique'. I find that his pacing is very very good, where he speaks at a slightly more casual/relaxed cadence, and includes pauses here and there to let me absorb the implications of what he's saying. And it's not like he has to dumb anything down, either; he covers some pretty advanced topics at a fairly comprehensive level, comparable, I would say, to the level of detail that you covered in this video, just on a different subject-area. So, I don't think you would have to dumb anything down at all. The last thing I wanted to mention, and it's related to the pacing issue, is the level of familiarity this video 'assumes the reader has' (in textbook-speak). This is the first time I'd ever heard of Carchardontosaurs, so I was (as a first time viewer of the channel, especially) expecting (and actually hoping for!) at least some (re-)introductory information of what you've previously discussed about Carchardontosaurs, and for example the issues relating to their competition with Tyrannosaurs. Perhaps you could even link to some of your previous videos in the little 'info box' thing that appears in the upper-right corner of a video when it has links to other videos embedded in it. I looked for it but didn't find it. I probably would have opened at least one, maybe two of your previous videos on the topic, if they had been available there! 😃 So, it's not like you'd have to completely re-introduce the entire topic, just for the sake of the possibility of new channel-visitors not being as familiar with your work as your regular viewers. But at the same time, leaving some tantalizing bread-crumbs to your previous discussions would not only satisfy the curiosity of new-viewers, but also help 'hook' new folks onto your past videos and ultimately help to grow your channel over time. So, that's about it! Hope that was as constructive as I intended it to be. I did enjoy the video overall, and I did learn a ton about Carchardontosaurs and Tyrannosaurs, too. So it's not meant to be a 'negative review'. I gave the video a thumbs up, too! I'm also serious in the comparison to Matt O'Dowd. He's a great presenter of complex information, and you seem to have roughly the same kind of depth of knowledge about your own field of expertise, and have a similar style of 'format' of video (but without the big fancy budget for animations and whatnot, obviously!), just a little bit too 'fast-paced' or 'rushed' for me, and it did happen to interfere with my overall enjoyment/sense-of-fun/sense-of-wonder of the video. Again, it could easily just be me, but again I thought I'd report about it to you just in case it might be a useful 'data point', even if it is 'anecdotal'. Hope you have a wonderful day, and I wish you the best of luck and growing prosperity for you and your channel! Cheers!

Please stop with this notion of tyrannosaurs displacing other large predatory theropods, as it really isn’t based on much (and is major fanboyism fuel for silly arguments). In particular, the idea of tyrannosaurids being “better evolved” or “superior” compared to other theropods needs to die as tyrannosaurids are not analogous with most other large theropods (being specialized for powerful, armour-piercing bites and relying on brute force to tackle stuff like ceratopsians, rather than the more refined cutting bites of other large terrestrial theropods useful against ornithopods and young/smaller sauropods; there is some dietary overlap, but overall tyrannosaurs were not doing the same things as other big theropods) Carcharodontosaurs as a clade we’re really finished off by the Cenomanian-Turonian Boundary Event, even if isolated taxa limped past this cataclysm (much the same happened to pliosaurs).

Excellent. Thanks

The dinosaur that haunted Tyrannosaurus.

Prob just a young carcharodontosaurus...

Why are the different ages and their subdivisions named as they are.? Cretaceous, turonian ect. throughout the ages. Geographic, environment, climate ect.?

Great video but please fix audio, it was only on left channel.

So the title is labeled backwards.

good show

Subscribed!

Is there something wrong with the audio, I only hear the left channel. THX for the video!

0:52/0:53 I get the feeling it needs an a between the beg and saurus parts. Because I might "somewhat?" misinterpret that as "Ooh-loo-beg-a-saur-us".

Wow you might want to update your sound system to where it's available to listen through ear phones. I don't understand how youtubers can produce videos and use a monochrome sound system where the sound plays through just 1 ear piece instead of both ear pieces

The audio is mono to the left for some reason

Outstanding paleo news site.

I remember everything.

Something's Wrong with This Volume In This Video?

huh. I only am getting audio from left side earphone. not sure if that's how you're recording or if something went wrong.

Not only did it kill out the charcharodontosaurs, it also outcompetes all the midsized predators It really does live up to its name 👑

I think I had a stroke trying to pronounce that name

Great video, great explanation, lousy sound quality - audio is a nightmare for headphones.

The dinosaurs were named after en.wikipedia.org/wiki/Ulugh_Beg and en.wikipedia.org/w/index.php?title=Timur_Leng

Dope

My right ear is lonely.

Of course it could be that the tyrannosaurs survived because they were small where everything larger died out and no other species came to the landmass of North America in significant numbers to compete. The US lost it's large predator diversity more than once. Where did torvosaurus, saurophaginax, allosaurus, ceratosaurus and marshosaurus all go? The next large predator in the record is literally utahraptor out on it's lonesome trying real hard to be a conventional therapod.

Any connection to OAE2 driving species extinctions at this time??

I'll be honest. I only clicked on this video to learn the enunciation of the title.

I wonder if it’s closely related to Siats Meekorum.

2:48/2:52 What do you mean by that?

No sound...

Its name sounds like someone burping mid sentence.

Next: shdhbdjdbdhsjbsjsbsbjdndjshvsjdhveisoqnbdjciebvsusjebaowonsnskxiuusvdnicujwbdvhskaoajwwbeytindbxbxkoapwlkxyxynvazzshbdndidjbsjwoqokxjcuhdbdjhdkwolwlaodnndndjyvdhcytshsnhshsikqpslkmdnbbcvdjskksppwiwihyqweyuipplkjhggfdsaazxccbnnmmkllpoiiuhbnbvggyttccdtesxxsaweffjjdjsbdoalndbchsjsbsaururs

It would be great if you could hear the vidio

i can see that spark in your eye when you say "absolute dominance"

Did the extra oxygen in the atmosphere help the T’s grow so large? Also, did they use those little arms for fending off insects?

who is here after finding out that this dinosaur is probably a gigantic dromaeosaur or raptor?

Your stuff is good but you need to pay attention to your production values

You mean hunting, unless you're talking about ghost dinosaurs

Great video IF you can lip read! NO SOUND NUB!!!!!!!!

I can't even spell d name.

Dude great video but you are incorrect the Tyrannosaurus was responsible for dictating the environment around him and also responsible for the fact that there was no medium sized dinosaurs.

The hand movements are distracting

He's difficult to understand. He trails off at the end of a sentence.

I’m interested in this kind of topics and I’m sure he knows his stuff but his presentation bored me to death

why does every new dinosaur have an impossible to pronounce name

What a ungodly name.

Its a super-hard to pronounce name...if you only ever learned english.

Messisaurus Ronaldosaurus

@?

thanks for the explanations. idiot news are sooo misleading.

Let me get this straight, Paleontologists have unearthed a menagerie of dinosaurs--recently--yet they give the giant allosaur coined the "Tyrannosaur Hunter" one of most mundane and least pronounceable names, let alone it's in honor of a poorly obscure 15th century astronomer. Paleontology must be on high strings these days. It's important to stand by an objective outlook when it comes to this field, but sometimes a little criticism is needed. P.S. What is wrong with your audio; get a boom mic from Amazon or Sweetwater for this and future videos and call it a day.

no sound, pointless

Wifeispissedasalotofcuss

Speak up!!!

names are getting stupid now.

T Rex: "This biosphere ain't big enough for the both of us! "

my left ear enjoyed this

my left ear enjoyed this