Could modern mammals survive in the Mesozoic?
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- Опубліковано 24 лип 2024
- The mesozoic was a very different world from ours today, would any groups of modern animals be able to survive in the mesozoic if transported back?
#dinosaur #cretaceous #jurassic #mammal #animals #chimpanzee #whale #whales #whatif #mesozoic #feline
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Music: 'Starlight' by SergePavkinMusic
The large mammals would be toast. Small mammals would adapt. This is w/o humans. If humans came along for the ride, they would face tremendous challenges, but adapt. They would eventually start genocidal campaign on their most dangerous predators, and most destructive and useless herbivores. They would select and domesticated dinosaurs that were useful to them. As populations grew this pattern would hold as control expanded.
I surprised he didn't mention humans but yeah what you said here is correct.
hoomans are op
Bruh if humans exist back then we'll all end up like pickle 🥒
Yes, we’d all be Pickle Rick
You know how an Inuit hunter kills a polar bear? Doesn't go stab it with a spear or shoot it with a bow. He takes a 2' shank made out of whalebone, rolls it up like a coil spring, and freezes it in a ball of blubber and fish heads, just the right size for a polar bear to swallow whole.
The bear comes along, swallows the ball, the shanks springs open,
stabs into the guts, liver, and/or lungs. The hunter waits an appropriate amount of time, and follows either bear tracks, or a dog to a nice, dead bear.
That is the real reason that every animal on earth is afraid of people.
Humans would be eating roast dinosaur on the regular, if given even a little chance to figure things out.
Its crazy to learn that dinosaurs literally just breathed better than we do
hhhhh hamon dinosaur!!!?
They were TOP D of their times
The atmosphere was denser and had more oxygen
@@ubersuperboss7761 Not really. The atmosphere had a higher O2 content at some points in the Mesozoic, but it was not denser. Dinosaurs are not that highly dependent on O2 levels because their respiratory systems branch out into air sacs that both make their breathing more efficient and reduce their overall weight. In saurischians, the clade that includes sauropods and theropods, the air sacs penetrate and expand into the bones in various parts of the animals' skeleton.
@@necrogenisis top ten most aggressive ways to start a comment number 10 : NOT REALLY
Orcas are ridiculously OP in the current enviroment where they are apex predators, their great intelligence and social structure could let them seriously disrupt an ancient ecosystems and help them adapt, I'd say if enough of them were transported and given a chance to learn about their new enviroment to make new strategies and share them with each other they could actually be successful even vs much larger predators
Cats are also broken hunter survivors, as long as there is prey smaller than them they can survive
I wonder if something like gazelles could survive too, high reaction time, big numbers, extremely fast, I'd like to see dinosaurs trying to catch them
Gazelles might have the problem of there being no grass until somewhen in the Crustaceous if I remember correctly. Or they could profit from the easier to digest farns and whatever else was around at that time and give the historic species a run for their money.
Deer to
For all the talk of lower oxygen levels. These youtubers forget that Alipine mammals exist. And Snow Leopards deal with lower oxygen than many Dinosaurs due to high up in the Mountains they live.
Orcas already hunt 20 meter long whales so they would have no problem. Not even mosasaurus would challenge a pod of Orcas.
@@lougomes2912 Mosasaurs and plesiosaurs would hunt orcs anytime. Orcas are very weak predators. Mosasaurs are monitor lizards, and monitor lizards are very, very smart.
Foxes, Rats, Rabbits, Gophers, Coyotes, in general todays smallest and most adaptable mammals would do well back in the mesozoic, specially 66 millions year ago because back than was much more like today than the jurassic.
Less oxygen so they would go out of breath and suffer quite quickly from exhuastion and general fatigues just from being alive.
@@MegaMrWrongthat is literally not true. oxygen levels were off by less than half a percent than they are today. the only main difference would be temperature and weather
@@Fern_Paleo we don't have air sacs to pressurised oxygen into our lungs, unidrectional air flow, or delicate permeable lung linings for oxygen exchange. Our lungs are doing two jobs of trying to be stiff bellows and a thin membranes for gas exchange. We don't have osmosis working in our favour compared to mammals. Dinosaurs had solid lungs with very thin membranes in addition to more efficient mitochondria that generate far less heat and way more mitochondria.
@@Fern_Paleo no only do we have less energy efficient mitochondria due to more leakiness of hydrogens. Dinosaur and avian mitochondria produce far less Reactive Oxygen Species than we do. Heat, sleep/hubernation and lower oxygen is mammals way of reducing ROS as we have much higher basal metabolism when inactive than dinosaurs.
@@Fern_Paleo the reduce ROS means that dinosaurs could grow to large sizes and birds could fly and keep their fast twitch muscle working. Their neurones, muscles can allows sustained activity of fast twitch glycolytic muscle fibres, even if those muscle fibre don't have enough mitochondria they can utilise cell to cell lactate shuttling to keep those fast twitch fibre working for much longer. Low ROS has benefits of allowing much more energy substrates such as glucose and triglycerides in the blood, in birds they can be twice to triple that of mammal as they are far less suspectible to oxidation and lipid peroxidation.
Don’t forget about bats. There were plenty of insects during Mesozoic times and most bats being nocturnal meant they could avoid predators..
Edit: Okay okay people. I just stated my opinion that bats *in theory* could thrive in the Mesozoic. There’s no need to start a riot…
Wonder if bats would have to contest with anurognathids (small bat-like pterosaurs from the Jurassic)
@@BonQeeqeethe3rd320yeah
You think birds wouldn't evolve into that noice first? They can't compete plus size wise pterosaurs have all the same advantages plus they have Arsaurs lungs .
They still would have to compete with small pterosaurs for sure
Bats started 56 or possibly 67 million years ago so they already had somewhat of a start but I got really no good answers outside of Wiki and some outdated research papers about bats and early primates
I think a pod of orcas could punch far above their weight using superior tactics.
yep one of the top contenders for the second smartest animal on earth would not lose to a bunch of lizard's.
Don't forget sperm whales they would obliterate the shit out of any animal with just a single ram, and raptorial (ancient predatory sperm whales) sperm whales also would prey on the reptiles
Lmao many marine reptiles have shown to be in group as well and don't forget their tough armor advantage
We don't know much about these ancient creatures and their intelligence and their social and defense and offense patterns
Would be best if we don't think that orcas can obliterate them or a sperm whale
Because first of all orcas have hunted blue whale which doesn't have that much self defense and offense other than it's size as well as for sperm whale, they fought with giant squids, but not a hefty megaton creature that could rival them
And these creatures whom you guys are calling a bunch of lizards are not only heavily built in armor and defense but equally or more dangerous offense as well
Do not forget that it is common for these creatures to encounter many creatures either equal or rivaling their size and offense, yet they have survived for an entire era easily thanks to their defense alone
Nope its too warm for them
@@aiperthatgotmutatedbytruth5638armour does nothing against intelligence
IMO, the smaller generalist mammals would do decently in the Mesozoic, but be unable to have a serious impact on their dinosaurian counterparts.
I don't know, depending on how smart they are they might have a pretty good chance of taking their nests out. Could see something similar to how invasive species are a real detriment to island bird species.
@@thepopulargirl1784
The difference is that island birds species have generally evolved in places that have no ground predators to eat their eggs (it has nothing to do with them not being intelligent); most non-avian dinosaurs (and birds from many larger islands or from continental ecosystems) DID evolve in places that had egg-eating land animals and developed countermeasures as to such.
I think smaller modern mammals would have all kinds of advantages over there Cretaceous cousins.
Cats, weasels, mongooses, raccoons, rats, etc. probably out compete more primitive mammals.
And those mammals they would out compete were doing fine back then.
Maybe they'd spread disease?
@@stephenballard3759 and perhaps they will seriously decreasing population of dinosaurs, even for the big one as most of the larger dinosaurs have eggs and hatchling that barely bigger than ostrich eggs or even smaller, perfect prey for weasel, badger, or skunk. While for adult dinosaur with very small size will directly preyed by them
Honestly I think this sounds like it could be a fun spec evo project. Having modern mammals sent to the prehistoric past to see how they adapt to the environment and which ones are able to successfully compete with dinosaurs and their kin.
Would love to see that
Well, I do have that time machine that temporal traveler from the 41st century gave me. Honestly, it has just been sitting in my closet since he left.
Check out tales of Kaimere, a really cool spec Evo/fantasy world building project. Plays around a lot with mixing fauna from different time periods together
@@finter4644 Yeah that did come to mind, but I didn't count it since it's mixing different creatures from different times in a different world, as opposed to sending modern day animals into the prehistoric past.
@@garg4531 Yeah it's not quite what you're saying, I just really like it
The hippo would definitely be a break out success. Sure there’d still be a good few predators like saurosucus that could take it down but it’s sheer aggression and size and the warm moist climate of either the Jurassic or Cretaceous would allow it to thrive.
I'd see hippos spend more time on land because of saurosucus but that's the only difference in behaviour or adaptation I could see
Hippos would grow larger and more aggressive and larger teeth
I mean, the main reason adult hippos are basically immune to crocodiles is the fact they are larger than them, but crocodiles kill baby hippos quite easily due to fact that the size advantage is gone, but baby hippos still survive since the adults protect them. sarcosuchus and deinosuchus, and many more huge prehistoric crocodiles makes adult hippos look like babies, and would just kill them all easily, since they don’t have some super sauropod sized hippo to come save them, and if you try to say “oh the hippos are fast on land, so they can just leave the water if there is a sarcosuchus” then they run into theropods which would slaughter adult hippos since they are just big soft triceratops with no horns.
Oooo ya just reminded me, so in the Congo basin a massive swamp the size of Texas the tribes there live isolated and in Stone Age eras . They have reported dinosaurs there for hundreds of yrs 3 different species . But they reported a super aggressive ping neck amphibious dinosaur that was so aggressive it drove out the hippos in the region
@@moltensh4dow506and yes remember how Gustave the giant Nile Crocodile was large enough to kill an eat a fully grown hippo, the Sarcosuchus and Deinosuchus is just that but on whole other level.
One thing i have to say, is that animals dont take fights they aren't sure they can win, unless they are desperate. So i think a marine reptile would think twice or at avoid confrontation with a pod of Orcas. Especially since there was a lot of easier prey around
Thank you so much.
This is what i am thinking on half the comments here.
But I guess everyone is thinking of Jurassic Park and 90s documentary dinosaurs that are killing and fighting all the time.
@@ostanes4145 Everyone here thinking that if I blast a velociraptor's arm off with a shotgun they'll sit there and think "Aha you only depleted 30% of my health bar" and *not* reconsider their life choices.
@@Haispawneryou wouldnt take just the arm unless you got a lucky hit with a slug, that raptor is the size of a turkey, youd blow it apart with a center mass hit.
The problem for the sea dinos isn't that an orca pack is a hard target.
The problem is that the orca pack is smart enough to figure that out and use it, and talk to other orca packs. Worse, they're not up against other social mammals with big brains or fish with swarm brain. They're up against massive reptiles who can't out think them or out swim them and who when killed provide food for days if not weeks.
Orcas would roam the dinosaur seas like homo sapiens wiping out mega fauna.
@@Haispawner many ppl here think they would even know a utah raptor is about to pounce and, like an action film, theyre so gonna pull up that shotgun and wam bam bam!!!
brah u wouldnt even know the raptor hit you until its jaws are around ur neck. most of us arent hunters anymore, animals with laughably better environmental awareness than us fall prey to them.
there are many instances of bears and lions taking multiple freakin hunting rifle shots and still sprint towards the hunter and fuck him up or even kill him, ure either a really REALLY good freakin shot, or ure gonna bleed extremely badly. 1 swipe of a claw or teeth on ur jugular (which they know about btw), and ure dead.
a little tid bit of information for yah, did you know that Emu birds can take 6 to 8 shots from hunting rifles before going down? the australian government stopped hunting them to extinction because they ran the numbers and realized they could ruin their freakin economy trying to kill the damn things, most police men miss more than hit their shots, shooting and actually hitting a target that moves is harder than most think, especially a raging dino thats faster and stronger than almost all big cats and all big birds today, although im talking about utah raptors here, not velociraptors.
Rodents would spread like a plague. Rats and mice would out compete all the Mesozoic mammals and probably wipe out a lot of dinosaur species by eating all their eggs.
There's very few Rats in climates that primarily have Snakes and large Lizards... so back then they'd be fucked.
@@LISSoundtracknah
@@LISSoundtrackyou can also interpret that information as meaning “snakes and large lizards only survive if there aren’t rats around”, so it’s not really saying much.
@@recursiveslacker7730 No lol Snakes and Lizards can't survive in colder climates.
You’re both wrong, rats exist in abundance in warm climates where reptiles are also extremely abundant and snakes and lizards can be found in climates that are cold for most of the year as well. Reptile eggs aren’t something that rats commonly eat, and rats aren’t some big problem for the success of reptile reproduction.
Interesting twist fot the common question of "could dinosaurs survive in modern earth today?"
For the most part I think the smallest mammals like rodents, mustelids and lagomorphs would habe little to no trouble escaling the claws of dinosaurs
Yes, they could, and would probably dominate in every ambient. As you said, probably only the small mammals would survive.
But today we have one creature that can rule beyond all: H O O M A N S
@@DaviFigueiraChavezWhatever gods there are above us gave us fire, but explosions? That was our idea
They would get outcompeted in every regard. The only way they don’t starve to death is by hunting farm animals at which point they get hunted to extinction
@@youtubealt243how so?
@@hjcb2976 less adaptations to climate, less food available, not as strong, fast, agile or intelligent pound for pound. Terror birds were the closest thing to dinosaurs and as soon as they encountered mammals of the same niche they became extinct immediately. Anything that does find an easy prey (an example maybe being carnotaurus hunting buffalo or bison) will starve to extinction as soon as they hunt too many.
The herbivores are a similar case. If they don’t get hunted to extinction by the superior mammalian predators, they’ll get outcompeted by the faster, stronger and smarter (pound for pound) mammalian herbivores, or will starve due to less vegetation than they used to eat.
I believe pigs, both the wild boar ones and the domesticated ones, would have a very good chance at survival, just because of how adaptable and intelligent they are. Also, they reproduce very quickly and are A LOT larger and stronger than people think. They defenatly wouldn't be strong enough to fight off, say, a T. rex, but they would definitely be able to fight off small to medium dinosaurs like velociraptors or something, especially because of the fact that they also live in large groups. other animals that have a good chance are most mustelids and rodents, smaller felines like house cats, maybe a few breeds of domestic dogs, and most flighted modern birds simply because flight is very overpowered.
Velociraptors, a decidedly small raptor, were shown to be capable of at least attempting to actively hunt protoceratopsians, aka larger, more armored, and perhaps angrier boars. Modern pigs would be able to survive because they would be equivalent to new york rats, reproducing in the brush faster than they can be hunted to extinction. But no, a boar could not kill a medium raptor. Maybe a velociraptor, but definitely not a deinonychus, and DEFINITELY not a utahraptor, which is a raptor the size of a polar bear.
@@CorwinTheOneAndOnly Good point, but we don't know if Velociraptor actually hunted Protoceratops, as they were a lot bigger, armored, and most likely traveled in large groups. That one famous fossil of them fighting could have been an old, sick, or already dying Protoceratops and/or a velociraptor desperate enough to try to fight it. we don't know if the raptor could actually kill the proto tho, cause they both ended up dying in a landslide. The proto was also seen fighting back, as it had the raptor's arm in its mouth, biting it. I know for a fact that large raptors like Utahraptor would kill pretty much any pig, which is why I said small to medium, pretty much anything around the size of the pig or smaller. Even smaller breeds of pigs have been known to fight off larger animals like bears, and their skin is thick enough to the point where snake venom has virtually no effect on them cause it can't break through the skin and into the blood. I feel like almost any dino around the same size as a pig or smaller would have trouble against one, and considering they live in groups, it just wouldn't be worth the risk. (sorry, I know this is long lol)
Pigs would be easy prey. They have no real defense, no armor, no claws. They would rely on aggression and their tusk, but that won’t go too far.
There’s a reason why prey of the prehistoric era have armored bodies, weaponized tales, horns and crest. They needed them to protect them against extremely viscous predators. Pigs would be no match for that world
Birds already lived with the dinosaurs so it's a given lol.
@@FOBanimates lol i know, i was talking about modern species like songbirds, parrots, and corvids
Mustelids, Such as ferrets, weasels, Skunks, Raccoons, And even wolverines in the colder regions. They are extremely adaptable, Very tough, Known to go after animals many times their own size, And some (skunks) Would have defense mechanisms that dinosaurs probably never faced before. I think they'll do well to the point that they might even threaten or even exterminate several species.
Imagine wolverines in prince creek formation
@@Marcin9200
I could see them preying upon troodontids, pachycephalosaurs, and young Edmontosauruses and Pachyrhinosauruses.
Same goes for wolfs and big cats, many of them would most likely survive, and horses for example would likely too, the one thing we are superior at over almost all animals, is stamina, any stamina based hunter or herbvivore would most likely survive, as most dinosaurs would not be able to outrun them
I could imagine the therapods getting sprayed in the face by skunks XD 😆
Suggesting that foul smell isn't a defense mechanism dinosaurs encountered is pretty arrogant of an assumption tho imo. There's no way such a thing could fossilize, but we *know* for a fact that several different groups of animals evolved foul smell independently, lizards, birds, mammals, hell even amphibians.
It's just a very simple defense mechanism, no reason to think extinct animals don't have it.
Orcas would be a menace in the oceans simply because there would be nothing on par with them for group hunting and coordination.
Plyosaurus trying to catch a few bodies? Nothing stopping three or four orcas just ganging up on it and breaking a few ribs and busting up some organs.
The higher temperatures would stop them
Raptorial sperm whales would wreck absolute havoc on late Cretaceous seas to point of probably outcompeting mosasaurs and pliosaurs, dolphins and seals would damage ammonites and plesiosaurs quite a big deal as well
Yeah I'm confident Orcas would figure out a way to deal with larger predators, perhaps laying traps or ambushing them, finding their weak spots to quickly take them down while minimizing their losses
Orcas are just too damn smart and social, they could even share strategies with each other to optimize those matchups
Not to mention that orcas are quite possibly faster than a pliosaur.
Plesiosaurs are known to be extremely social aswell, and we have evidence pointing on altruistic behavior, this applies to pliosaurs aswell
Food for thought, if every animal from the Madagascar ecosystem were to fit in the Mesozoic time period, they’d all survive since most are arboreal or ground dwelling animals that scale around the primitive animals that are already established, particularly lemurs, fossas and tenrecs would do great in this period
More food for thought- remember that the Madagascar we know now is not the Madagascar of several hundred years ago. Humans only reached the island within the last thousand years, and before we stepped foot there, there were many more, larger animals. Elephant birds, sloth and monkey lemurs, small hippopotamuses, and larger relatives of the fossa. It seems like the animals that survived human predation would also be the ones to do well against Mesozoic predators.
well. baiscally we have so few fossils from jungles/largely arboreal areas in the past, because the PH of jungle dirt and large amount of scavengers. In fact, they would be far mroe diverse tahn we have any idea of.
I'm surprised he didn't mention that dinosaurs likely had the same visual range that birds do, being able to see in low UV, a range which mammals lack and in addition many mammals do have markings that show up in UV that we can't really see but a dinosaur would likely be able to, making the temporally displaced mammals more easily visible and thus more easily hunted
What
Cant expect too much from ai generated scripts
@@krlllxwdym
Damn that's interesting! @cameronnelson632
I think the best way to figure out if a modern animal would survive would be if they can survive us, hunans. Modern humans are such a massive super predator, changing the environment in ways that no other animal, modern or prehistoric, can hold a candle to, giant 10 ton predator or not.
The smaller to medium generalist mammals, like coyotes, cats or weasels, would do great I feel, some of them have adapted to us spectacularly, and their populations are increasing. However i think larger species would do well too in areas. Horses, goats and elephants thanks to their intelligence and social behaviors.
I think elephants breed too slowly to win out.
@@ikengaspirit3063 ya, I think it would boil down to just how effective their intelligence and social systems carry them. They are super adaptable for such a large animal, but the predator pressure from mega large carnivores, something they really haven't had to deal with, might be too much. I do think out of all the large modern mammals(elephants, rhinos, hippos etc) they would hold out the best.
The Elephant is king nowadays due to the intelligence combined with their size. Take away one of those being a viable defense and I think they'd struggle, especially with their very slow reproductive cycle. Although very smart I haven't seen elephants use for much in the way of adaptability, they seem to use it for remembering where to get what and stick to that rather than trying to 'invent' new ways of getting food. And for emotional connections within the herd.
Orcas however which were more or less dismissed in this video I think would thrive. They also bank on size and intelligence but they're extremely adaptable - every single pod seems to have different hunting strategies that evolve over time and every now and then they seem to learn some completely new way to get food. I wouldn't be surprised if they came up with some ways to eliminate the competition and gang up on all the other large predators. If they do survive I also wouldn't be surprised if they evolve to be even smarter due to having to adapt to such a different ecosystem all of a sudden with the smarter ones being the ones to procreate.
Ya, its probably a bit of a toss up if elephants could make it, they have adapted quite well to human presence in many areas however and that can't be understated.
Orcas are DEF being slept on though. They are without a doubt one of the top predators on the planet, and being incredibly intelligent, large, and adaptable I think they would prove to be a major headache to many of the predators in the prehistoric seas. I think many species of dolphins would do well, better then other cetaceans such as whales.@@Axeiaa
@@MAD2192I mean back in that era there were also big dinosaurs and I don’t think their growth rate was faster.
It depends on how many elephants you bring in that era, if it’s above 20k and they’re spread out they’re definitely surviving
I could be wrong, but didn't the atmosphere contains much more oxygen back then? That seems like it would affect mammals a lot.
That's what I thought. I've heard a few times that higher oxygen is why everything was so big, including insects.
@@Durzo1259oxygen was higher in the carboniferous, which is when most larger land arthropods lived. but arthropleura, the largest land arthropod, persisted into in the early permian, and also existed when oxygen levels were only slightly higher than today. so oxygen levels probably didn't play as big a part as we once thought and it was probably more to due with there not being any large vertebrates to prey on them
Same thing, I heard the abundance of oxygen back then was so intense that it would be poisonous to us.
@@DaimonAnimations divers breathe pure oxygen for hours at a time. 35% would be nothing to us.
EDIT: Now that I think about it, it would actually be BENEFICIAL to us. The only reason we tire out is because our muscles oxygen requirements become so high during strenuous excercise that we cant take in enough air, our muscles are forced into anaerobic metabolism which produces a ton of lactic acid and slows us down. If we had higher concentrations of oxygen, our muscles would be able to function aerobically for much longer, greatly extending the time that would could run, jump, climb etc
@@ChaotiX1 No, they don't breath pure oxygen. And no it wouldn't be beneficial. Read up on oxygen toxicity.
I think largeish mammals could survive, as long as they can climb and live in a forested area, so jaguars, tigers leopards and chimps and other primates could probably survive well, but any primarily land living mammal would be outcompeted
I mean I’m sure humans would dominate
@@Kalossupremacy3356 depends on if you give us rocket launchers or 100 000 BCE technology
@@eVill420 you underestimate the power of pointy sticks
@@Kalossupremacy3356 pointy sticks aren't very good against armor
@@eVill420we defeated land crocs.biggest lizards just by using spears. It isn't that hard because t rex dont run much
Orcas would probably do well in the Mesozoic. You mentioned a Pliosaurus, however the Orca already dealt with massive predators. Megalodon. There are theories that Megalodon populations may have begun to die out not just because of changing environment, but because Orca's hit the scene. Targeting the same prey populations. Between Orca and the changing weather, Meg was forced to try and hunt smaller prey such as seals. Only to come into conflict with the more efficient hunter for such things. Carcharodon Carcharias, better known as the Great White.
As for Wild Cats, they would succeed and adapt. Mountain Lions in western parts of America have an issue with Wolves. Wolves have figure out if they follow the lion, they can get a guaranteed meal. So, the lion will actually kill an animal and stash it, knowing the wolves will eat that stash. This allows the lion to go out and kill something for its own, without the wolves messing with it while it eats.
All the larger predators feed on the orcas until the orcas find out where their livers are
But hey the theory is just a theory so you know... It be false, Oh and also there are evidence that megalodon ate orca's
@@ParadoxSupreme-hl4lgLiver located. Taking aim
Orca bouta do some liver shots
It would depend on the number of orcas though. Because while Orcas are strong, Megalodon has about the advantage in everything, except intelligence. 1 Orca would definitely not be enough. 2 probably not either. 3 yeah I can see that.
I feel a slept on mammal are ungulates especially smaller species like deer. Nothing in the Mesozoic would be fast enough to touch them and with the superior hearing and sense of smell in mammals most dinosaurs wouldn't stand a chance of an ambush. There is the issue of a lack of grazing but browsing species like deer might do fine, especially if dropped off in the mid to late Cretaceous where the coniferous plants and ferns have lost ground to more modern deciduous plants.
Another honorable mention are canines. These mesopredators would fill a similar niche to the proposed cats trading their capability as climbers to get out of the way of dinosaurs for the ability to more easily outrun them. Even macropredatory canines like wolves and african wild dogs would do well, chasing down relatively small dinosaurs in packs and wolfing down their kills quickly before predatory dinosaurs can steal the kill. Along with the ability to actually dig dens to keep their young safe in they'd only have to worry about small dinosaur mesopredators being a danger to their young.
True
Wolves would probably be snacked on by pterosaurs on occasion, but other then that yeah
@@Friendofthescavs Pteranodon weight is about the same as average wolf. I don't think anything short of big Azharchid would try to hunt them.
Raptors will prey ungulates, and large dinossaurs can steal the hunt of big mammals oredators every timw
@@januszpolak254he talk about Quetzal and similars.
I would like to add pigs to the mix. They can eat anything, adapt to most habitats, are pretty smart and when need be, can fight back ferociously
I'm glad this video blew up for this guy, the content is great and his delivery is chill. The other videos on their channel are great too. Definitely deserves more recognition. Also, humans in this situation could be their own video lol.
Chatgpt scripts
@@krlllx Noticeably, but GPT can't speak for you or edit the video so I think the creator still deserves props. It's an aspect I'm choosing to overlook, at least the content is out there and well put together. On a sude note, we will be seeing more and more of this in the coming years. May as well get used to it and encourage creators who embrace the tech to do it as best they can rather than discourage them from creating at all.
I think Badgers would do decently well. A bunch of dinosaurs means a bunch of likely buried dinosaur eggs. Badgers could sneakily eat the eggs, which are so big that they’d provide a substantial food source.
This video is very impressive, glad to have found this channel!
I bet bears would do well, take a grizzly for instance, extremely powerful and durable so it could handle itself against the smaller to mid sized dinosaurs, and still quite fast at both running and swimming for escaping the large apex dinosaurs. On top of all of that, bears have very varied diets of meat, fish, berries, etc so they are generalists basically, could fill different niches.
They could also climb trees, especially the smaller bears. Wolves fuck with them a lot tho, steal their kills. You've gotta think raptors would absolutely exhaust and eat them alive. And the little prey might just be too fast. And the big prey might just be too deadly. The cubs would get picked off. Unless the bears were on the smaller side and could go undetected, to competitive
@@legakattack4771 climbing that's true too! Tbh though I'd bet a fully grown pissed off mama grizzly could fight an adult Utah or other large raptor, it's the larger therapods they'd have to run from imo
@@peterd4047 Utah raptors have larger size estiamtes now, putting them about as alrge or bigger than kodiak bears, even at their largest.
@@bennogb5069 damn!
@@bennogb5069I think a bear could still challenge them. Given that raptors were very bird-like they must’ve been quite agile and precise, however extremely fragile compared to their size with thin skin, not many fat nor muscles and light bone structures. A bear however is just a walking block of muscles and fat with deadly precision and agility and speed. Additionally bears have an extra layer of muscles under their skin allowing to move it, making slashing attacks raptors used much less effective. A Raptor even bigger than a grizzly would probably struggle to damage it while the bear could just run it over easily and crush it. Also don’t forget that especially grizzlies would likely start to compete with dinosaurs like Suchomimus and Spinosaurus for fish at rivers
Honey Badgers, Wolverine, Coyotes, Wolves, Weasel, Martins, Rats and Hyenas definitely could.
But they would have to compete with the other smaller mammals and dinosaurs during the mesozoic. And the hyenas and wolves would have to compete with the dromaeosaurs and magaraptorids
@@BoneTonHonestly wolves and hyenas would probably completly outcompete dromeosaurs in their size range. Remember dromaeosaurs were not super inteligent pack hunters but mainly solitiary creatures.
Beavers. I can’t tell you why I have so much confidence in them, I just know in my heart that they’d somehow become a dominant force in the Mesozoic
Because of this comment I just imagine a tyrannosaurus skull in the middle of a beaver den 🗣️
@@Spinofaarus_boi I’d say that would be evidence that Mesozoic beavers had some sort of early religious practices based around natural spirits.
@@Headtalk can confirm a few million years ago I went to Florida to see Mickey Mouse but instead I saw beavers sacrificing a copium trex to get beaver nuggets from buckies 😭 (also Sid the sloth and master oogway was there with me)
@@Spinofaarus_boi Mesozoic Disney world was so much more fun and genuine, it’s really gone downhill since then.
@@Headtalk yeah I remember the first time I ate a tourist 😔
0:37 this is to say they had proportionally weaker bones and more delicate respiratory systems. Mammals might be less efficient and not able to get as big, but we are a lot tougher than birds that share many of these features with dinosaur. For the same size, a mammal is tougher than a bird, and likely their dinosaur ancestors
Just as a fun fact: mammals also have a much more efficient clotting cascade than other tetrapods. This predisposes use to things like heart attacks and strokes, but it also makes us much less likely to bleed out from an injury. Our mobile jaws and specialized teeth also make us much more effective at chewing and grinding compared to other tetrapods
Yeah i think that a Wolverine would destroy a velociraptor in a 1v1 fight.
Nice vid! Hm, I wonder how rodents such as rats and mice might do in the Mesozoic, Beavers would be another that would be interesting to think about in the Mesozoic. Many of the smaller canids too, like foxes and coyotes. Ooh, and bats! That's another one to think about.
definitely some good ideas, the beavers especially I think would do the best, the bats I would worry about the oxygen levels, I think this video will need a part 2
Great video! Something I (and surely plenty others) have thought about a lot. Just subbed to your channel so when you make it big I can say I was here at just 1k lol
The writing, editing and research is all top notch!
thank you!
1:00 thanks for the clarification 👍 I came into the video thinking it was up in the air, but yeah I guess not.
Cool video. I wonder if most mammals could find a way to survive since they all occupy niches more or less analogous to the ones prehistoric dinosaurs filled.
It reminds me of some fictional worldbuilding I came up with as a kid where megafaunal mammals and nonavian dinosaurs co-evolved. Still a pretty cool idea I think
I think a lot of people in the comments are underestimating the animals of back then. They also are the results of many millions of years of evolution. And they have adaptions suited to the specific conditions back then-- temperature, oxygen levels, etc. Warm-bloodedness had advantages and disadvantages, specifically the higher caloric requirements
I always love the idea of bringing the TitanoBoa in the Mesozoic Era. Haast eagle can be a mid level predator in the food chain. Mastodons can potentially thrive if they are in a herd since they're more stockier and in theory more tougher compared to Mammoths. Dire wolves with a large pack and their intelligence.
orcas, bats, humans, rodents, almost every feline and almost every canid would demolish the jurassic or cretaceous
Nobody has mentioned them, but I would have great faith in the bears too. Similar to cats, they're killing machines. Imagine Kodiaks or Polar bears in the colder regions.
I doubt Orcas would be of any significance in those oceans, as a pack of 5 or 6 Mososuars or Pleiosaurs of 40 tons each would be an Absolute massacre against the pod of Orcas
@@patrickfoster_media5451 mosasaurus weighted 12-15 tons and we have no evidence of pack hunting on mosasaurus or plesiosaurus, and since they were related to komodo dragons I highly doubt it
I’d like to see how a short faced bear would do and how other mammals would adapt and evolve if the populations and environments were evenly mixed to start. There would be surprises.
I'm sure all bears would be very successful
"Cat hisses"
T - Rex "Hold my beer"
"Proceeds to roar the skull out of it's skin"
That chimp in the thumbnail is like "how did I get myself into this mess"
If there were any cold climates then polar bears, elk, moose, wolverines, wolves, foxes, and other cold climate animals could I think. As much as I'd like to see a honey badger stand up to a T-rex, I don't know of that kind of aggression would be a good or bad thing overall.
I don't think you realise how big a T-Rex is compared to a Honey Badger...
@@LISSoundtrack I am pretty sure it was a joke
Hell no. Mammals and many animals now almost got a reset button while dinasours had a longer evolution
crocodiles would be like:
“yo grandpa! how are ya?”
“oh hello my dear, i’m doing well, and you look so much like your father now”
People are seriously underestimating Dinosaurs just because they're "less evolved" but they fail to realise dinosaurs ruled the Earth for way longer than humans have existed. These things ruled for so long that our current time is closer to the stegosaurs than the t-rex is. Also you know damn well that competition was fierce back then and their ecosystems were super diverse due to how old they were.
Not to mention who knows how many species of dinosaurs that we haven’t discovered yet / never will discover that probably fit into a lot of these mammalian niches
Dude, drawing a parallel between our and T-Rex's temporal distance from the stegosaur is one of the coolest things I've read all week.
Humans r smart dinosaurs are dumb we’d be eating trex soup
Yeah, not saying humans survival would be impossible but I'm stating the era of dinosaurs would not be as easy as people make out for plenty of modern creatures.@@slothniel8881
U mean we are close to trex than stegosaurus is
I'm glad someone else pointed out deer would probably be much faster and more sensitive to sound than any dinosaur that might hunt them. They would likely outcompete other browsing herbivores in the same size range and maybe even drive them to extinction. Invasive deer is a real problem on islands.
Wild equines might be in a similar boat. I'm not sure if larger modern herbivores like moose or water Buffalo would survive. They would be at a huge disadvantage against anything bigger than them, and would have to adapt to a more flighty lifestyle to make it.
This is a super fun thought experiment, I'm gonna be thinking about this for a while!
I think you're absolutely right about deer, but I think it comes back to something else too. They're mammals, thus have extreme stamina compared to reptiles/birds. A deer wouldn't just outrun a dinosaur, it would be able to run significantly faster for significantly longer.
If we're talking exclusively mammals then Wolves, Kiang, goas, chiru, yaks, snow leopards, Tibetan sand fox, ibex, certain species of gazelle, the Himalayan brown bear and certain species of water buffalo. You'd also have smaller mammals could well such as certain mice, rabbits, sheep and mountain goats because all of these mammals I've mentioned currently live at high altitudes so are both ideally suited for both subsistence which would not bring them into competition with dinosaurs, and capable of breathing at reduced oxygen levels.
Good point. Regardless of average global temperature and oxygen levels there would have been mountain ranges, too cold for dinosaurs.
Orcas and sperm whales would also survive, maybe even hippos.
This is really cool. I'd watch a deep dive version of this if you ever make one.
This would make a good book series, Some tweaks here and there and soon you got the next big fandom
What about larger semi-arboreal cats, like the jaguar and leopard? Jaguars hunt and eat caimans.
definitely would do better than lions or tigers, especially the leopard, but they would be large enough to be in competition for prey with dromeosaurs and young tyrannosaurs (assuming late cretaceous North America or Asia) and I think that would cause them a lot of trouble
@@Sedimented.Studios Yeah they would get bullied a lot, like cheetahs in africa get bullied by almost every carnivore.
@@Sedimented.Studiosfirst, why should we send animals back in time to see what would happen? Curiosity with callousness? I don't think it is an ethical idea at all. Simulate it in computers but don't ever make it happen.
@@Sedimented.Studiosyou did a fine video but even on most of the point you showed are not particularly accurate and are of less magnitude than showcased like oxygen levels, whilst yes mammals don't have as much of an efficient breathing system, many mammals have also worked around that issue without much setbacks
Also whales realistically particularly Miocene raptorial sperm whales adapted towards more warm water would I dare say obliterate the Cretaceous marine web chain probably to the point of near collapse, I genuinely do no believe any mosasaur and pliosaur would be able to hold a candle towards their pod hunting, adaptability and intelligence, same goes but not as to that level with plesiosaurs as seals would mostly also outcompete them but they would be able to partitioning, the animals however seals and dolphins would give an insane amount of pressure would be ammonites and something alike we have in fossil record with many nautilus species going extinct due to early seals predation
@@user-ti6ix5tn2oare u stu pid?
very fun to think about these things, thanks for sharing!
I write sci fi and have planets with time travel and various branches of evolution being transported so I wonder about these things, atmosphere composition, competitiveness.
The thing about the animals on this list is that would also be cool to discuss is how they would also evolve over time if they don't die out, and since their specialization comes from modern day they would in theory be even more successful as they adapt to their environment that they've never been in before.
Very interesting video mate 👏🏼
I think baboons would do fine:
Relatively heat adapted.
live in large organized groups.
You better believe a big male or several could delete a dromaesaur.
And they are reasonably omnivorous.
I could very well see certain more adaptable mammals doing well in the Mesozoic. Canines, mustelids, and rodents for example. I could even see arboreal species of primates doing okay.
Good video.. I really enjoyed watching this
great video!
It would be quite interesting having a highly evolved variety of mammals living in the Mesozoic era. Dinosaurs would certainly remain the dominant species of biomes closer to the equator, but modern mammals could wrestle that dominance away in regions closer to the poles. Interestingly, that's exactly the case in the Carnivores PC game series, with alien species that highly resemble dinosaurs & mammals living on an Earth-like planet several light-years from us.
ok robin from fortnite
I like that the idea that dinosaurs were "less evolved" is being challenged. They were never really outcompeted by mammals. There was an extinction event, and that seems to be what ended the non-avian dinosaurs. I think it opens people to the idea like pre-history is not necessary "uncivilized" and history is not necessarily linear in the ways that we imagine it to be. The loss of something like the Library of Alexandria drastically changes everything to a point where ancient people were probably more knowledgable in certain facets (metallurgy comes to mind especially in regards to Damascus steel which we cannot replicate) than we are today.
If anything, we're slowly learning that dinosaurs at their prime were actually more evolved than current mammals are. We've had 65 million years since the extinction to go from the little gerbils we were to all sorts of the vaguely powerful stuff we are today, with vaguely powerful abilities.
Dinosaurs have had over 200 million years of straight evolution. Take T Rex for example. The more we learn about it, the more we realize just how UNDER-dramatized we've made its abilities in stuff like movies. It really was the ultimate predator. Baboon level intelligence, binocular vision for miles, night vision for miles, *endurance running,* bloodhound smell, highest terrestrial bite force, highest body weight of any terrestrial predator, extremely strong bones and hornlets on the skull for ramming, deep sonorous calls that we could barely hear due to frequency but other rexes could hear for miles, speaking of which they had very good hearing, a hip design that was weirdly well adapted to agile close quarters combat and could turn on a dime, flexible yet strong neck vertebrae for quick turns and bites, and I'm pretty sure there's more to this list.
And this is just one animal, most of the other dinosaurs are almost up to that par. Who knows what cracked up abilities the late cretaceous raptors were packing that we just don't know about because we can't determine some behaviors with fossils alone. And that's not even including the fact that all known information about nature says that all herbivores in an ecosystem need to be some level more dangerous than their nearest predator. Sauropods are the most OP animal this planet has ever seen due to sheer size, triceratops is possibly the deadliest animal to ever live if modern elephants are anything to go by, and ankys are the most armored animal to ever live.
200+ million years of straight evolution produced some serious monsters.
The loss of the library of Alexandria is greatly exaggerated. Anything important in the library would have had copies in sister libraries. What really caused the loss in knowledge was the loss of emphasis in the arts and sciences with the decline of the Roman Empire.
@@CorwinTheOneAndOnly the mammalians did manage to produce one species capable of truly thriving in the Mesozoic -- their trump card: Homo Sapiens
Where did you hear we can't replicate Damascus steel? We not only can easily produce steel of similar quality, but our metallurgy skills are massively more developed in every manner to where we can also easily produce higher quality steel than Damascus steel not only in much greater quantities, but in massively larger sizes and volumes (Just think about the thickness of armor plates for warships for example). The only thing that made Damascus steel notable for it's time was it being relatively capable with an extremely noticeable pattern. Ultimately the issues of reproducing that today isn't the capability of knowing, but rather the fact that discovering the exact method through experimental archeology requires more money and personnel than society deems worth it, and none of the extremely limited amount of people attempting to replicate it has yet discovered it.
The myths about Damascus Steel is akin to Roman concrete. We do actually have the capability of producing higher quality versions than both in the modern day, just those materials during their time had enough of a reputation as to carry on to the modern day.
@@bewawolf19 Exactly. What a uninformed joke of a comment
Subbed 🎉 love me some ancient animals😊
The thing about mammals and oxygen tho is waaay back in the Triassic, primitive mammals were mostly nocturnal and many burrowed under the surface, all in order to avoid dinosaur predation. I did a report for extra credit in college comparing the respiratory and circulatory systems of birds and mammals and found out something interesting.
Birds, and by extension dinosaurs, have the unidirectional breathing mentioned, and essentially evolved makes use of as much oxygen that was present in the air. Mammalian ancestors, living mostly underground, had to deal with relatively lower levels of oxygen, and they evolved to get by with the absolute minimum oxygen they needed. It is why all mammalian blood cells lack a nucleus so as to carry as much oxygen as possible. Birds blood cells still have nuclei. So I would say lower oxygen levels wouldn’t have as dire as an effect as it was stated here.
Just imagine a honey badger scaring off a therapod, and also I feel that orcas would do well in just about any time period
Other toothed whales would likely prey on the marine reptiles
@EternalEmperorofZakuul yeah, sperm whales also most likely would have to adapt to tearing prey apart together, like 2 whales come together and tear a piece of flesh apart by pulling away so they get chunks of meat they can swallow, lone bulls probably would start to travel with females for more protection and food aswell and the orcas would do something similar except they'd be able to hunt animals and tear them apart on the spot. Orcas can maneuver to DROWN a blue whale so a pod would be able to manhandle any reptiles
Yay some builds are just oppressive
Giant mammals like elephants, rhinos, hippos, buffalo and giraffe would be common menu items, surely. Although the elephant could 1v1 some large carnivores, megatherapods would regularly take them down as prey. I wonder if mammoths and other giant proboscideans would be able to survive the Mesozoic
Elephants would definitely thrive cause there is no way any predator is taking on a herd of african bush elephants
Elephants would do amazing in late Cretaceous outside of America. Only predators they would have to face are Abelisaurs that would struggle with herds.
Elephants would probably contend quite well with the giant herbivore dinosaurs. One they are quite large, two they are very smart and strongly social. Only downside is long pregnancy and childhood, but that is cancelled out by the fact that the rest of the herd protectects vunerable members when they can't protect themselves.
Ground sloths would do amazing in the Cretaceous megatherians would pretty much be extremely dangerous to attack even for a t rex
So giant chalicotheres and paracetatheres not only counting proboscideans
Honestly most mammals would do quite well against saurians despite this idea that dinosaurs outmatched mammals in almost any area
Even on predatory niche taking out the mega theropods that would be on their own league I can say that on small to mid niches between felines and canids and bears they could do quite well against dromaeosaurs, small abelisaurs and maybe outcompeting them in some places
@@Oinker-Sploinkermany theropods were probably pack hunters
Dope video! 2,000 subs is criminal though haha!
The dinosaur chick straying too far into the jungle when it sees 40 chimpanzees descending upon it
Chimps would actually do really well cause of their strength and omnivorous diet I could actually see if chimps were living with dinosaurs their diet would be planets primitive mammals small dinosaurs and baby dinosaurs
yeah could see a troop of chimps hunting nests of eggs, specially those of smaller dinosaurs or nests that are unattended
good idea for preventing chimp attacks
dropship the entire chimp population to the cretaceous through a time machine.
@@amazingaquaticsandexotics3030 then wake up in a cage built by chimps to farm humans for labour and meat.
A Single Pliosaur is gonna get Merced by a pod of 30 Orcas. And destroyed by a pod of 100 Pilot Whales. Pliosaurs would be just another target to these mammals.
All dolphins don't stand a chance against a pliosaur, and I'm not even talking about mosasaurs. A group of orcas has a hard time killing even a sea lion.
@@Polosatiy_VaranBro from all point you make under comments this is the most stupid so far
No orcas don’t have problems with seals like with everybody hunts do fail that’s normal seals are not stupid
@@whitegold2960 Orcs hunt small seals, but not sea lions
It is funny that this video recommendation came up when I was watching "The Lost World: Jurassic Park" and "Jurassic Park III" last night, lol!
Chimpanzees would kick ass in the Mesozoic, barring the Oxygen thingy
Also, don’t the marine reptiles slow down in 🥶? The whales 🐋 warm-blooded. Live in cold water possible advantage.
Nope, marine reptiles were warm blooded and gave live birth. Plesiosaurs in particular lived in colder climates.
@@radioactivereptile7286 Not all marine reptiles necessarily gave live birth. Nothosaurus, for example, likely came ashore to lay eggs like a sea turtle.
@@DovahFettnothosaurs lived in the triassic not late cretaceous
Whales and dolphins will single handedly drive the entire Mososaur and Plesiosaur family to extinction
baleen whales rely too much on how the currents work, being dumped in a completely different ocean food chain would certainly f up them. Dolphins i dont see how they would negatively impact either the mosasaur or plesiosaur population, maybe orcas would but they never faced any predator their size in modern times, let alone even bigger than them, plus many mosaurs have differing niches, a few that arent filled by any modern dolphin or whale
As intelligent as some cetaceans are, mosasaurs and plesiosaurs would clap them
@@PlusSizedDolphin tell me how they can take of a pod of intelligent orcas, pilot whales or humpback's?
@@Oinker-Sploinker you are aware that many plesiosaurs and mosasaurs are much bigger than pilot whales and orcas, right? that alone makes them capable of predation and self defence.
plus plesiosaurs are evidenced to be extremely social and even engage in altruistic behavior, this extends to pliosaur aswell.
@@Oinker-Sploinker They wouldn't take out an entire pod at once obviously, but especially in the mosasaurs case it would have been large enough to easily take down any one of those whales. While Orcas are indeed very intelligent, if you have watched the new prehistoric planet show it shows us that mosasaurs were actually crazy fast and used ambush tactics similar to sharks (like attacking from the bottom of the animal). A mosasaur would have easily been able to shoot up from the bottom, kill an Orca, and swim away with its meal faster than other Orcas could retaliate. Also, like the guy said in the video, those prehistoric marine reptiles were also more aerobically efficient, so there's no way that a pod of Orcas would be able to wear down one of these giant reptiles in time to save their comrades. As for humpbacks and pilot whales, humpbacks are just too big and slow to be able to deal with a large mosasaur or pliosaur, and pilot whales would be like a swimming bag of chips for these guys.
Your voice is perfect for these I say! Mashallah. beautiful art and plenty to learn!
had no idea about the advanced respiratory system of the dinossaurs, but i also think the higher metabolism of mamals should me mentioned too on what advantages it would give them.
If time travel is impossible for the study, of pre-historic animals then explain prehistoric park 👌😤🤓🔥☠️
Orcas would dominate the seas, even a the greatest marine reptiles would fall to their might
Wrong. Orcas as predators are very weak, their physiology is rather mediocre. This is why there were no large marine mammals in the Mesozoic.
@@Polosatiy_Varanthere were no marine mammals in the Mesozoic because there were no niches open for mammals to be filled
That’s not an argument against orcas
@@whitegold2960 There were niches, they were just all occupied and mammals COULD NOT compete with reptiles. Look at modern semi-aquatic niches in the tropics. Do you see any serious croc's competitors there? There are river dolphins, but these are only prey for crocs, such as saltwater croc, black caiman or marsh croc. Do you see river orcas? Nope, because they can't.
Ichthyosaurs would destroy orcas lmao
@Polosatiy_Varan if reptiles are so great why did mammals out compete them for so many niches? Why didn't any marine reptiles evolve post dinosaur era despite the niches being "there" as you stated? Also river dolphins and Orcas is apples and oranges
This is such a good video concept I must comment about it lol
Very interesting topic. Thanks for the video.
I think if there's enough zebra sized animals big cat's would do pretty well and would probably cause localized extinctions cause there is no way a juvenile t-rex is beating a tiger or a surprise attack from a jag and definitely not a pride of lions
A junior will stand a chance
They generally wouldn't mess with them just like how they generally don't kill crocs unless starvation was in play. Juvenile tree also hunted, with theories they filled a medium predator niche partly why there's so many Rex fossils vs medium sized dinosaur ones. Also the stance of a t Rex would give them a higher awareness making them harder to sneak up on
What size we talking?
@@BadVoodo0idk man the tees got excellent sight fs, but I don’t think it’s detecting a tiger who doesn’t want to be detected
A juvenile t.rex weights 1 ton on average at the start of their juvenile phase. They also had very agile bodies and sharp teeth at that stage, even a pride of lions would be stupid to engage one.
I feel like large predatory mammals could fare well in the Mesozoic. They’re big enough to be efficient enough to fight off other meat eating dinosaurs and outcompete their niches to fill them. They’re also not so big it becomes a problem.
Could Lions compete against Dakoraptors? These hunted hadrosaurs and ceratopsians many times their size
Heck even little velociraptors hunted protoceratops many times it's size.
Modern Eagles hunts foxes, coyotes, wolves and deers many times their size.
Where are you getting this idea of modern predatory mammals being able to outcompete other apex predators? Every single supposed example of this happening in the fossil record is questionable or outright discredited.
@@MegaMrWrong
Lions could in theory compete against dakotaraptors since lions live in packs and dakotaraptors most likely didn’t. There is no evidence of social behavior in raptors and scientists believe they were solitary or hunted in pairs. And dakotaraptors did not hunt full grown ceratopsians and hadrosaurs, but babies. And there were plenty of other smaller animals in Hell Creek that would be more suitable prey for dakotas.
While a single dakotaraptor would shred a lion to pieces, a pack of lions would be too much for them to handle. Best evidence for that I can think of is terror birds being outcompeted by smilodon (who were also social and way less efficient than lions in their hunting methods). However that does not mean lions would be able to survive in Hell Creek, as there is Trex as well. Trex could bully lions off their prey and they wouldn’t be able to do shit against it. Also different age groups of Trex would fill different ecological niches, so even if we presume full grown trexes wouldn’t see lions as competition, young ones definitely would .
Tigers on the other hand, who are solitary, aren’t going to do well against dakotaraptors. Leopards may not be able to hunt dakotaraptors or outcompete them, but their ability to climb trees can give them a massive upper hand, as they can kill small prey and stash it somewhere where larger predators cannot get.
Also while yes, velociraptors are known to hunt down protoceratops who are larger, keep in mind that protoceratops is a herbivore and is adapted differently in comparison to a carnivore. While a leopard can kill prey several times its size, it wouldn’t be able to kill a much larger predator like a lion or a tiger unless it got insanely lucky.
Comparison to eagles is also unfair, as eagles hunt prey by dropping at it from above and snapping it’s neck. They have the advantage of flight and if we were to take flight away from them, they wouldn’t be able to stand up against deer, wolves and foxes who they are capable of killing otherwise.
Basically dinosaurs are cool and highly efficient, however that doesn’t mean that every single dinosaur will have an upper hand over a mammal.
@@enfieldlammergeierthe problem i see is that many medium size dinos are the equivalent of a hyppo for them, every time they will try to take one one of them is going to die or be heavely damaged.
@@enfieldlammergeiermost of this comment is based on misconception
lions are one of the few exceptions of big cats that hunt in packs, even then males are usually solitary and we don't know if dromaeosaurs did either, to say its unlikely is unfounded as there are actually multiple birds and reltiles that do, and multiple pieces of potential evidence that not only dromaeosaurs but many other theropods did.
Where did you get the notion that Dakotaraptors couldn't climb trees? They most surely could and that is one of the primary functions of the foot claw. The leopard has no advantage.
Terror birds were never outcompeted by smilodons or carnivorans, if anything it is the contrary. Predatory mammals and terror birds rarely ever met, but some species like Titanis migrated north to compete with wolves and cats, and they arguably were largest and most dominant carnivores of that time
The rest of the terror birds went extinct due to climate change before predatory mammals migrated to south. There was no "outcompetition" terror birds fared fine when competing with both wolves and cats.
Predatory mammals would not oucompete theropods in the mesozoic. They would either coexist or die out. In comparison, they are poorly adapted to the mesozoic climate. Because they evolved and lived under these confitions, Theropods were perfectly adapted to the prehistoric ecosystems and putting something that isn't is going to fail in comparison.
Eagles and birds of prey can and have killed their prey via ground combat without the use of flight. So to say they cannot perform such feats without it is wrong. Nit only that but Komodo dragons, reptiles with no flight ability at all, not much claws, and ectothermic have killed megafauna much larger than themselves without the use of poison.
Could you do a video about what dinosaurs and animals lived in trees? For example microraptor and such
Idk why I love animal videos so much
I think not jus small cats but medium sizes too like cougar, leopard and snow leopards. Their ability to climb is fantastic and they are very adaptable. I think they could kill juvenil dinosaurs and cause a hige impact.
Juvenile cats of any species would have fallen prey to dinosaurs, pterosaurs and lepidosaurs much more quickly.
(Kaimere Moment)
I'm totally zonked right now and this was absolutely incredible
It would be intriguing to see elephants in this era. They are have no predators today but would be prime targets back in the day. At the same time they would have been by far and away the smartest animals around. To watch their behaviour modifications would be fascinating
Hm, why the focus on mammals? What about introducing modern birds to the Mesozoic? Such as eagles, parrots, storks, corvids, etc. Those could do great in the Mesozoic.
Because you’d be introducing more dinosaurs to a world ruled by dinosaurs
@@koltenwonnacott3276 Uh, yeah and... ? Your point? I had thought the point was introducing modern animals to the mesozoic and exploring how they would survive, how successful they'd be, and how they'd change their new ecosystems. So why should it matter if the modern animals also happen to be dinosaurs?
@@jessejarmon2100 The focus on mammals was specified at the start of the video. The historical misunderstanding of dinosaurs was that they were an evolutionary dead end waiting to go extinct and be surpassed by the "far superior" mammals. As our perspectives have changed, we are now looking at how this idea holds up. It's not just imprinting modern animals into the past, but looking at it from this interesting historical misconception.
Also, birds evolved during the mezozoic... so you'd just be putting modern birds next to other, very similar animals. It's not particularily interesting I don't think. Maybe crows or parrots could be neat!
because this is a video about introducing mammals to the Mesozoic
Cuz that’s what he wanted to talk about
There were many mammals during the late cretaceous filling similar niches to todays mammals, with the largest being badger sized.
Only burrowing mammals could survive. All other mammals were prone to the giant theropoda predators.
Megafauna mammals would have issues dealing with giant predators, their dinosaur competitors had more efficient respiratory systems and a far more competitive gestation period.
Mid sized mammals would have issues dealing with the large and medium sized dinosaurs.
Small burrowing mammals would have to compete with other small burrowing mammals.
Bats, id imagine, would do very well. Thanks to echolocation they could fill a niche i dont beleive existed during the late cretaceous.
I mean it’s not like they’ll have to fight big predators, a pack of lions wouldn’t fight big and adult dinosaur, they will hunt small ones, they will hunt the prey of big ones and with their superior intelligence and fighting strategies and numbers all big predators are pretty much doomed.
@@mattaku9430 I disagree with you. First: we know very little about dinosaur intelligence, but Trex is the most studied extinct animal and we now know they were far smarter than lions: with intelligence equal to baboons and chimpanzees [google this]. This means Trex was more intelligent than lions with superior hunting strategies than lions, trex may have also hunted in packs. Secondly: dinosaurs, like all modern archosaurs, likely cared for their young.
We have very little evidence of ancient habitats but late cretaceous north America is the most well known habitat in the age of dinosaurs, lets pretend we put a large pack of lions in this habitat. How would they do, pretending that the diseases dont kill the lions?
Positive: I do think there were animals lions could hunt:
1. Pachycephalosaurus: similar in niche and size to water buffalo, though the dinosaur was a bit more massive thus a bit more dangerous.
2. Leptoceratops: Similar in niche to wild hogs, a burrower like wild hogs. This animal can be quite larger than hogs and are armed with a powerful beak so it would be very dangerous for lions, just like wild hogs.
3. Thescelosaurus: lived in creeks and rivers where lions dont normally hunt but they could take these down if they could somehow get one.
4. Anzu: lived in forested area lions dont usually hunt but they were like ostriches just much heavier and stronger with large claws. A dangerous hunt for lions.
5. Ornithomimid: lived in similar dry areas as lions. Like ostriches but MUCH heavier and stronger with still awesome speed. I can imagine a lion ambushing, with the tall theropoda seeing the lion coming and leaping to kick the far smaller lion into a broken jaw. A 1500lbs ornithomimid wont run from a lion, they will only run from cretaceous predators.
That's about it, the mammals were too small in late cretaceous for lions to bother, and while the crocodiles were far less dangerous in this habitat than the nile crocodile lions deal with today, lions arent great at hunting these aquatic reptiles and the osteodorm is also bad for lion canines.
While this looks great, here is why lions would go extinct.
Mammals lived a monstrous 90 million years along non avian dinosaurs, yet not 1 mammal evolved to be 100lbs, much less 300lbs like a lion, not until the asteroid ended the non avians reign. Why?
We see it with invasive species today wrecking havoc in ecosystems. When a predator is larger, the smaller animals must be able to find refuge by either flying away, or hiding [in a ditch or on top a tree] and if they cant they go extinct.
All dinosaurs have a unilateral respiratory system meaning their breathing is far more efficient than mammal breathing. Theropoda even have airsacs. So a mammal can not out-stamina a theropoda predator, so while running away can work temporarily, like canines today, the theropoda will chase you until exhaustion and kill you. They hunted like wolfs.
Trex was in this habitat. Trex had phenomenal eye sight, far superiod to any feline, it was a night hunter, Trex also had superior olfactory to any mammal ever, comparable to vultures.
Lions would not be able to sleep in the open like today. Trex would find them and eat. If lions ran, Trex would keep a steady chase until they tire, and it is food. Lions, unlike the other dinosaurs i mentioned, have inferior mammal lungs so they would tire quickly.
How could lions find refuge? Lions are not great at digging ditches, they usually have them for young but theyre too big for their own ditches.
Lions could not run away because of trex superiod stamina, trex cant touch them at first but after a long chase the lions would tire.
Lions could climb trees, like jaguars do in Africa today to hide from lions and hyenas.
Lions are not great at climbing trees but theoretically they can to avoid the tyrant lizard king.
In this habitat was there another predator that climbed trees to avoid trex?
Yes: Dakota raptor.
Dakota raptor had hollow bones, thus it was better at climbing trees than lions, but these were heavily muscular animals, and at almost twice the mass as lions, id imagine dakota raptor hunting the far smaller lions as well.
The pride would dwindle into extinction.
Honestly, i dont even imagine a trex giving much chase to lions, they are tiny morsels, but i can see a juvenile trex, straying from its parents, and at 2000lbs it really had no fear from predation aside from other trex. Juvenile trex had large long legs with a lean muscular body, they were extremely fast before growing large enough to take down the giants.
A 2000lbs trex would be fast, with phenomenal stamina and the annoyance to play with its food [lions] until killing them.
@@robinsonray6766 google this? Point to the paper where it says that.
The last time I checked it was an mistake in caculations made by paleontologist Stephen Brusatte, who I heard has since acknowledged that he had misinterpreted the data. Brusatte was referring to the encephalization quotient, a measure of relative brain size, which is similar in chimpanzees and Tyrannosaurus. However, the equation is calculated differently in mammals and reptiles, so it's more accurate to say that a Tyrannosaurus was as much smarter than an average reptile as a chimpanzee is smarter than an average mammal-but because mammals are, on average, much smarter than reptiles, this means that Tyrannosaurus was not as smart as a chimpanzee (but it was still one of the smartest non-avian dinosaurs).
About the evolution of mammals: they didn’t need to, they were perfectly adapted to their ecosystem and started greatly diversifying when niches were free.
Now, Lion would simply hear Trex approaching and wake up, next, a whole pack of lions would take a stand against Trex, if he decides to attack they would take turns, while Trex is focused on 1 lion another one would attack it, Trex would be forced to chase lion who attacked him, while another one would injure him further, quickly Trex would receive enough injuries to simply bleed out to death.
@@mattaku9430 Again: we know very little about non avian dinosaur intelligence. The only dinosaurs left, the birds, pack far more neurons tightly than mammals, this is why Herons, who have one of the smallest brain to body ratio of any bird, have been observed ''fishing'' with bread crumbs [same thing orcas do].
Also, again: mammals lived along side dinosaurs for a monstrous 90 million years. There were many habitats, many extinctions and many opportunities for mammals to evolve and fill larger niches yet they never did. The age of dinosaur was filled with extinctions. In fact, the Triassic-jurrasic extinction was DEADLIER than the kt extinction with a larger loss of biodivercity.
I have mentioned just a few of the biomechanical issues mammals would face with dinosaurs.
I also think it would be more interesting to compare quaternary mammals to dinosaurs. The quaternary extinction just happened, thus we are in a post apocalyptic era with low biodivercity, low speciality in niches. The animals and habitats you see today are primitive, this is why land mammals today are so small and most are generalist. This is a weak era of mammals. The quaternary extinction was just a few thousand years unfortunately. Sucks that we just missed what may have been the prime of terrestrial mammal fauna.
@@mattaku9430 1500lbs herbivorous water buffaloes have killed lions.
Im not sure what makes you think a pack of 300lbs lions could kill a 12 ton trex. Biting would tickle the trex.
Lions have taken down smaller elephants but even large lion packs avoid bull elephants who are far smaller than trex and herbivorous.
Trex may have been in packs and they would trample any lion that got close.
2000lbs juvenile trex are far larger, stronger than lions and they are also faster, they too would hunt lions for snacks.
Large predators ALWAYS hunt smaller predators especially when theyre magnitudes larger. A 13 ton super predator vs a 300lbs cat is a no brainer LOL
High quality content 🙌👍
This would be a very fun/challenging concept for a video game
Imagine if a pack of Velociraptors (scaled to true size) were chasing a wild cat, the cat would probably just climb up a tree...which Velos can't do. Or Modern Crocodiles could out compete semi-aquatic dinosaurs.
As long as small vertebrates exist, cats would also be able to exist in a huge array of time periods and ecosystems.
Wouldn't modern croc just be small crocs for the time?
Orcas Are extremely intelligent and adaptable, They could probably use group tactics to survive against Dangerous cretaceous ocean predators. larger, Slower whales maybe not.
I’m sure sperm whales would do fine
I like that you had to brake down traveling a random control group through time was not possible haha.
Make one about modern bird groups in Mesozoic
Humans would dominate the Mesozoic
I wouldn’t be so certain of that. Your mental image is probably of a human plopped into the cretaceous with guns, ammo, survival tools, and military gear. We would be introducing humans in the past just the same as any other animal, with only their bodies being sent back. That means no clothes, no tools, no weapons. The question then becomes what kind of humans? Are we sending back suburbanites who couldn’t open a can without an electric can opener? Or are we talking about people trained in wilderness survival? Depending on these, and many other factors, humans may not ever have the chance to dominate.
We do have a history of competing with megafauna successfully, though, but that is in a specific modern context. There is also the consideration that many of the plants we eat, that we have intentionally modified and cultivated, simply wouldn’t exist. We wouldn’t know for certain what is safe and palatable and what isn’t. Then consider that the animals that have contributed to our rise, that we have domesticated and bread to suit humans, would not exist. We wouldn’t have horses, cattle, sheep. There goes our transportation, easy food and milk, and an easy source of wool for clothing. There are just so many variables that we shouldn’t assume that humans would be successful.
Hahahaha no: oxígen 19% and CO2 20%
My man in the Purple, you are absolutely everywhere.
@@parakeorex humans with tech: hell yeah
Lol yes we would, we would dominate in pretty much every era. We would ofc face challenges but would adapt and eventually bend the prehistoric world to our will like we do today. @@parakeorex
Honestly, I think dinosaurs (including birds) are some of the most alien-like creatures we're familiar with. Imagine a giant two-legged monster that is faster than you and can easily kill you. Which also can probably fly or at least glide. Pterosaurs would be even more alien.
And then you got the crocodilians/crocodilimorphs: Fat log which sits in water waiting to swallow whatever comes by.
Woah.
Now this is the content i want to see
it is hard to compare, since the dinosaurs are all dead except Birds, but Dinosaurs lived for 100 million years so they did something right!
The oxygen levels would definitely cause problems for the modern mammals.
The oxygen levels were quite high, meaning that the mammals would perform even better than now.
@@damsarebiotic6263oxygen poisoning is a thing. There would start to be serious consequences after a while of breathing in oxygen levels they're not accustomed to breathing.
@@damsarebiotic6263 too much oxygen isn't good for you
@@chadgorosaurus4898 It isn’t, it’ll shorten your lifespan definitely, but it won’t kill since oxygen toxicity only really occurs when people breathe in pure oxygen.
Depends on the period, in the late cretaceous they weren’t very different from what they are now
You don't think a troop of baboons, numbering anything up to 250, could hold their own? They could probably give a T-Rex the runaround.
No. A troop of baboons can take out a leopard, but even a lion would be too much for them
Nah, it'll be the embodiment of that one meme where the car keeps going over speed bumps (the baboons) while going to McDonalds (an injured Triceratops.)
@@brunomattos1130 "even a lion" okay lol
250 traffic cones vs 1 bull dozer?
Probably 75 large, intelligent, agile male baboons protecting their young against, yeah, a lumbering, slow, bulldozer that normally only eats carrion.
"Time travel, is not possible" The fact that you had to make that clear makes me loose faith for humanity
You should do a video about dinosaurs respiratory system