Dawn of the Age of Mammals 

Unless they are rodents where they evolve to be more rodent like

They were actually more monotreme or possum like

The do like the crab the evolved to rodnet

Dang! Budget summarised comment of Budget Museum video. Nice work.

Aa

Sweet revenge.

@@malleableconcrete Not really revenge seeing as they didn't actually outcompete anything to get their second chance (no, the giant birds and land crocs and such were not outcompeted by a new in flux of large mammals; mammals actually got big in the Early Paleocene, BEFORE those became a thing)

@@bkjeong4302 Its revenge enough if you move into a dead guys house and take over everything he used to own. Also, whatever way Phorusrhacids went extinct, they're still dead and their niches are currently occupied by big mammals, and they were competing against Sparassodonts and later Procyonids before that in South America, and competing against a huge variety of familiar mammalian predators in North America during their brief sojurn there. Meanwhile in Australia giant monitor lizards and land crocodiles were almost certainly out-competed by mammals in the form of humans, but I've read that Thylacoleo was a much more common predator in the continent regardless. Also its not just predatory niches, Birds have often dipped into large herbivorous ones too but haven't had much success compared to Mammals with only a few species still being alive and the most successful ones living on islands with few or no notable mammals competitors (and again going extinct when humans show up).

@@malleableconcrete Re: birds in herbivorous niches, that’s more because mammals beat them to it (as I pointed out, large herbivorous mammals were already around in the Early Paleocene, before Gastornis and such came around). If birds actually did beat the mammals into herbivorous niches we may be seeing the reverse.

@@bkjeong4302 That sounds like getting out-competed to me!

same here i found the channel last week

I love you too.

OMG same!

Same

Took a brake from learning to learn? Love it

Same but honesty who's to say we can't, at least we can see the closest we can get

It's almost unfathomable these creatures existed. 🤯 I've always hoped there was a way to view _how it really was_ Because obviously it's about impossible to know completely. 😀

@@apexnext hopefully one day we will figure out to look back in time. Anything’s possible we just need to figure it out.

@@theemperor3557 a Time Machine wouldn’t be hard to accomplish we just don’t have the technology yet. I believe that folding space(wormholes) could in theory create a loop in time as space and the temporal planes are linked. If we could figure out how to fold space we can figure out a way to unfold it as well thus turning back the hands of time and create a Timehole and peer into the past. The only issue is would traveling back in time take just as long as say traveling into the future(which is just going about life the way we do now ex. Everyday hour by hour minute by minute) then we’d truly never be able to peer into the far past because we can’t live past 80 yrs.

@@kahlilbenjamin7298 true but I was thinking that since time moves forward as the universe expands wouldn’t the temporal plane start going backwards if the crunch theory is true and the universe starts shrinking back into its pre big bang state so time would also move backwards.

most people and documentaries talk about dinosaurs, their extinction then skip everything after and go straight to humans and their evolution and it gets boring seeing the same things, i would love to see more about the Archean, Proterozoic and Paleozoic life that existed even the Triassic doesn’t get much if any coverage compared to Jurassic, Cretaceous and the human parts of the Cenozoic

@@Mrgodzilla1990 honestly, BBC should do remakes of the "Walking With" series (Walking With Monsters, Walking With Dinosaurs, Walking With Beasts). It touches apon just about every period of life on Earth starting from the Cambrian explosion, it's just a shame that in the almost 20 years since its release, tons of information in those documentaries has gone out of date.

This is ironic I know more about Early Cenozoic than Late Cenozoic lol. Mainly with me only watching first three Walking with Beasts episodes, and reading books about Tertitary period. In fact, i only learned about American Megafauna like Mastodon, Columbian mammoth and teratorns as recent as 2022

Usually... but not always!

We all know that guy 😂🙄

Are yall serious??

Exactly. I guess TBM, Trey and Tierzoo just fall in the catagory of youtubers who I'll want to listen to no matter what topic they are talking about.

@@ChloePricesNumberOneSimp Fully agreed! haha

What happened to him? His newer content is kinda ehhhh bad

@@lukaslefevre8007 mainstream and profit happened.

I think this exact window of time the most fascinating Imagine accidentally going back in time, and just seeing basically all the animals you are used too But slightly different

Its something like the uncanny valley but with animals

It seems there's always a niche for a rhinoceras-like clade of mammals, and a hippo-like clade, and a cat-like clade, and so on. Every now and then the whole clade becomes extinct, and then another group radiates into that niche.

Why can't we have rhinos with knob horns today? They're so much better than the modern ones!

Smh... so what or when according to this(science) did we humans come about...? Gosh

Not really as far back as 63 million years ago , the swamps were dominated by titanoaboa and other reptilian snakes which reached even 15 m long , the other marshy places were dominated by a wide variety of crocodilians some even as large as 10 m , as for terrestrial reptiles , there existed land Crocs at that time and what mammalian megafauna are you talking about? Uniratherium ( forgot how to pronounce it lol) only came into existence in the miocene if I'm not wrong

@@proudfatherofadeadweightso5715 Pantodonts and mesonychians reached megafaunal sizes within a few million years of non-avian dinosaurs becoming extinct. We’re talking about the Early Paleocene here. Titanoboa was semiaquatic (due to its size and its reliance on large aquatic prey); terrestrial ecosystems were already dominated by mammals. The land crocs were NOT around just yet at this point: they came a bit later in the Early Eocene. People seem to ignore this constantly. Uintatherium came around in the Early Eocene as well.

@@bkjeong4302 idk what megafauna size is to you but early paleocene saw no mammalian megafauna , yes there existed rare large pantodonts but even the largest ones like barylambda was a mere 2.5 metres in length , very very small hell even tiny compared to the large ass hyaenodontids that'll be roaming in the early eocene , and there were plenty of reptilian overlords in the early paleocene , even a small crocodilian like borealosuchus could've murdered the largest pantodonts of that time

@@proudfatherofadeadweightso5715 2.5m is actually comparable to plenty of large mammals that come later, so by your logic those can’t be large animals either. Look at the definition of megafauna. Also, hyaenodonts were NOT large during the Early Eocene (they were the size of small cats or such then), which was dominated by mesonychians (which also got big all the way back in the Early Paleocene)

Both of you: I have enjoyed reading your debate. What do you two think of: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-QrWUilBdDEo.html

It's because, after mass extinctions, nature will just throw shit at the wall and see what sticks. Terrestrial crocodilians just didn't work out for more than a couple million years in both cases.

I find it hilarious how we talk about the past like we’re so certain what happened with nothing but clues and educated guesses to fill in the gaps

​@@DuskLegendpretty sure we have more than "clues" and we make more than "educated guesses".

@@BeedrillYanyan no, I’m pretty sure that’s what they amount to

I think he never touched apon the monotremes because they never really made an impact on Cenozoic life. Just like today, they were always just sorta in the corner.

I'm disappointed that there was no mention of pelycosaurs

That's correct. There was no mention of egg laying mammals at all in this video. There are two surviving Monotremes in today's world - the platypus and the echidna.

He also largely skipped through the marsupials and went straight to the placentals. Oh I forgot they're just "those things from Australia" not even worth mentioning. 😒

@@1legend517 I mean, unless you’re Australian, they’re kinda not around. There is one marsupial seen on this entire continent and it’s the thing you have to shoo from the dumpster. Hell, the only reason marsupials are the majority mammal population in Australia is because placental mammals weren’t present to drive them to extinction.

I personally would love to fight off an entelodont or a Paraceratherium.

In one of my homebrew TTRPG settings, my rule is that I can't use clades with extant members, they all have to be extinct (aside from humans and therefore primates). So no cats, dogs or bears, but there are nimravids, amphicyonids, hyaenodonts, mesonychids etc, for example. It's a fun challenge, designing new species/ecosystems solely from extinct ones.

i love making characters and was always inspired by prehistoric/extinct animals, nature has such fascinating designs

​@@armata_strigoi_0 Are there tamed deinonychus? I will suggest some clades to you Wild: Anomalocarids Gorgonopsids Megaraptorans Opahbinaids Domesticated/tamed: Heterodontosaurs Early pangolins Skrunkly lil multituberculates Early Tyrannosaurs Anurognathids Lystrosaurs Small dromaeosaurs.

@@the_blue_jay_raptor Thanks for taking an interest haha There aren't many specific genera like _Deinonychus_ (with some exceptions, notably humans) - to give some context, most of the existent clades have been around for quite some time and have diverged in different ways. This is because, via magical means I won't get into (but it's mostly to justify being able to pick and choose my favourite clades lol), organisms are replicated as and when they're needed and then left to their own devices. It's basically a "seed world" but with ongoing, recurring "seeding" events. That aside, funnily enough you've actually managed to hit a number of clades I've already included. Non-mammalian synapsids still have a big presence, undecided on gorgonopsids but therocephalians and cynodonts have both been replicated; dicynodonts are still widespread, many are indeed descended from _Lystrosaurus_ . Multituberculates are definitely around, I just don't know to what extent because TBH, I still haven't sorted out which of those early mammalian clades are present and in what quantities. Heterodontosaurs actually became the dominant dinosaurian clade haha (where dinosaurs are dominant), everything from burrowing herbivores to giant saber-toothed carnivores. Anurognathids are among the most numerous pterosaurs, including giant hypercarnivores (basically, mothman). As for dromaeosaurs, microraptorines are the success story and a branch or two have reverted to foot-slogging in certain places. As for the rest, they're either not included or not numerous for whatever reason. When it comes to invertebrates, all I can say for certain is that trilobites and ammonites are still living the dream lol. This is already long enough so I'll leave it here, but if you're still interested and have any more questions, feel free to ask.

Mechanic is a very difficult job. You are not stupid, this is just not your main area of knowledge

Be like water and adapt to everything.

Smaller is better

H@yd3n! How ya doin'?

Monday !

I do know that monotremes have lower body temperatures and smaller brains than marsupials

According to Wikipedia, “Multituberculates are usually placed as crown mammals outside either of the two main groups of living mammals-Theria, including placentals and marsupials, and Monotremata-but closer to Theria than to monotremes. Nonetheless, at least one study found a potential status as sister taxa to monotremes/Australosphenida.”

Actually, its not the largest anymore. Palaeoloxodon namadicus is the biggest now

Yeah, pretty weird the badger sized mammal wasn’t mentioned

Good comment! I was thinking the same as I watched the video.

My favorite Mesozoic mammalian is the Repenomamus, basically the Tasmanian devil that hunt dinosaurs. It can grow over 1 meter and lived in Cretaceous China, possibly living with Psitaccosaurus, Sinosauropteryx, Caudipteryx and even Yutyrannus?

Knuckles is also a monotreme