The Ancient ‘Mammals’ that Reigned Before the Dinosaurs 

@Venky Wank Both tell us where we came from.

@KAANI Bingo ...Can't wait until someone is looking at our remains, and trying to figure out what we were ...And the numerous things they'll probably get wrong

Trust

I can't believe it either

@GOD of FUCK exactly

Ikr

@jorge pearl that’s why I hate smart people

No, they'll just call you 'toes'

In 400 million years the intelligent cockroaches will put your skeleton together in the wrong way and say you were a quadrapid virus that overpopulated the world, ate everything, and shat out plastic bottles.

This is a hilarious comment chain.

I want to like but it’s the perfect number so, 👍

Sounds about right

It makes me wonder how many planets must be out there that might just be teeming with life like ancient earth. There's gotta be a thousand of them for every planet with intelligent life.

@@raygunn95 True, and if there are planets with conditions for like like Earth, as is hypothesized. Then the aliens will look somewhat like Earth creatures, and there might even be alien Human species. Cause the conditions for life need to be similar For example, they found the marks in Europa, and they look like cyanobacteria of a very primitive Earth where life was begining to spring in the Ocean

@@MybeautifulandamazingPrincess I think my the universe has a general biochemistry for all living beings

The absence of existence is not unlucky, either. You are programmed by Nature to feel lucky to be alive, and to have survival instict, etc. But that's just that, an instinct.

It's good to feel grateful our present existence has nothing to do with luck really.

SO much easier on the nerves

@@carlhenry6223 same eons is kinds fake just facts but they dont say what the title says

@@carlhenry6223 I've never watched the other channel and actually prefer this one. I discovered this channel. .000000000098980012223 seconds ago. I started typing this comment before I discovered the channel.

Right, but I nevertheless stay fan of P.B.S. Eons.

It sure could have a lot of potential. Hope it will release videos debunking dinosaurs as a hoax one day. Happy summer from Iceland!We´re smart people who don´t believe bullshit.

But cant find our ancestors remains! It's all fascinating honestly...

@@deadwingdomain Accept we did and keep finding more lol.

@@Scanntraxx001 Except*

They do get it wrong very often though, especially when they see a new species

Tagris AJ both could be right in this case

1 million is easily fathomed as 1 thousand thousand.

Jamesha, don’t pretend you didn’t understand.

And then you look at how long we been here and how close we currently are to fucking everything up for us selfs, and that's when you wonder if we truly are "intelligent" and if intelligens truly is that great for suvival.

@@MassimoAngotzi ha ha in reality i fathomed that he actually did fathom the immensity. ok i'm done!

It's not the truth. The Dinosaurs only been around a few thousand years.

The usual portrayal is of rat type creatures running around the feet of dinosaurs. I had no idea how big some of these got.

@@anonb4632 the rat mammals were the cryptids of that time

It's not really weird, dinosaurs had always fascinated us, because they were the first big creatures to be found (being more ancient, and often not in North America, permian synapsides were not found in such details than dinosaurs). And later, dinosaurs had Jurassic Park, not synapsids :p

@@anonb4632 I think the biggest of them were the size of a badger and eats baby dinosaurs (among other things ^^).

@@krankarvolund7771 You can't underestimate peoples fixation on big things either I found it surprising to realize how diverse both mammals/premammals and even the more terrestrial croc relatives were in the Jurassic and Cretaceous all the way up until the end Cretaceous where almost all mammals and every crocodylomorph relatives were wiped out alongside the nonavian dinosaurs. There were also far more diverse reptiles insects arachnids crustaceans bivalves plants really every major evolutionary group seems to have had far more diversity than I had ever realized based on typical depictions. Like I was quite surprised to learn that angiosperms were so dominant during the late cretaceous. Even relatives of temperate deciduous flora had largely arisen adapted to high latitudes. When you realize just how much there was in the Mesozoic it really changes your perception of the Chicxulub impact and its effect on life. Mammals after the archosaurs were actually surprisingly one of the hardest hit animal groups as a whole, placental mammals happened to fare far better than most mammal groups for some reason but that was a particularly important exception. Even the crocodilians that survived were very small species. There are entire ecological niches which haven't returned since the end of the Cretaceous, entire clades of insects numerous groups of plants and algae that vanished. The event wasn't something that just offed the dinosaurs and not mammals letting them dominate as it is often portrayed it was a literal ecological collapse with specialists getting wiped out entirely aside from those adapted to aquatic detrital environments. But images basically always show the big stuff and maybe our smaller ancestors.

...or will be exist

Ikr , it's all so mindblowing -and imagine all the fossils buried all over the place still waiting to be uncovered

And maybe there are other worlds out there with life

Thank you, I appreciate it

@@mothlightmedia1936 look at his profile picture, and you will understand more

Starting to think the protomammals and that asteroid were in cahoots

Except that the diapsids still dominate the skies in the form of birds, man-made aircraft notwithstanding.

@@dondragmer2412 The bats man it's all conspiracy and you know what is worse? ALL THE SYNAPSIDS ARE IN ON IT EXCEPT US!

@@jamesperson199 synapsids were higher level beings

Who knows reptiles might get there revenge in 100 million years

That's very short in geological time

Well for life on earth 110 million years ago is not that short buutt is not that far behind either 😅 There's being life for around 2 billion years mostly in the form of primordial soup and bacterias. It wasn't until 600 million years that everything fast forwarded.

@@luisvalentin361 he said geological not biological

@@snoom3350 Well buddy in a geological time scale, life is also taken in consideration. If not, you should know why the current Eon is called the Phanerozoic Eon

@@luisvalentin361 but what were the odds of it happening?

Most do. It takes specific conditions to preserve a fossil

Yeh i was thinking about this the other day we'd never know about the dinosaurs

Most extinct animals will never be discovered. Fossilisation requires extremely specific conditions. Most animals never fossilized and are lost to time entirely.

We still do. 95% of human history is unknown.

@@marcuswalters8093 We have strong knowledge about the most important parts of human history. It's human pre-history that is mostly unknown to us.

micah bell true dat micah

Everything is connected.

Alabama intensifies

Your a Rat cowpoke!

I hate you

Imagine all the weird shit that didn't fossilize (not actual shit)

Ya nature is a rascal

Fishyc150 That thought has haunted me my whole life.

Such is the nature of the universe and all life that came to be in its spaces..

@@Conkel Yep. Sucks.

Blackpilled

Where’s the irony in that statement?

Well, did they, really?

Chris Cuellar That we used to believe that mammals arose after the fall of the dinosaurs, but were long before them.

@@xerxesofpersia9630 well, not really. stem-mammals predate the dinosaurs, but not mammals themselfs. true mammals didn't apear until the late triassic.

@@secularargument It's a bit ironic because we characterise the post-Dinosaur era as "the reign of mammals", but before dinosaurs mammal ancestors were even more successful.

It wasn't intended as an example of their radiation but just a visual representation of archosaurs, however, I see how it could be misleading, so fair point.

shut up

@@rumikazbar8228 who?

agreed but i didn't take it as an example for basal archosaurs as it looked too modern.

Rumi Kazbar people pointing out a mistake in an educational video isn’t anything bad or wrong if anything it is something positive that improves the content

History was boring because it was all about what the humans did and not what the weird mammal lizard things did

To me has happened boring books, sadly... Very limited stuff... Greek educational system.....

This isn't history. This is paleobiology. With history we consider our history as species or genus, just considering our ancestors. It is basically anthropology. Which is boring af

@@vincenzocapasso9990 ikr??? History (or even biology books could have more stuff concerning the subject) books in school could have both but educational systems are trash, bc they have the idea that some things are more *important* than others :/

Whoever*

Thank you

They are cool

@@irenewolfe4013 My exact thoughts!

Irene Wolfe did you have a stroke

Looks like the creature in borderland

@@paulojose7060 skags?

That’s because there is no pounding music.

people are simple minded

@@Tatusiek_1 you are living proof

@@judgeprime3730 Based on what?

@@judgeprime3730you feel attacked?

PINK SEAS!! Edit: it literlly became so hot so oxygen couldent exist in the water so bacteria that lives in water with No oxygen made the water pink! Also the bacteria was super toxic!

J. B. I just said pink seas xD

It’s not looking good now

And what will come after us? Intelligent birds?

I give our species 500 more years before we 🔥 out and that's being pretty generous.

chipmunk

Have some respect for your great great great great great and many more greats grandad

No it was magic and Dinos did not exist just giants fool until the flood anyway oh yea and Demons and Angels I forgot about them.

@@jameshannagan7830 I really hope you’re joking, it’s hard to tell these days

@@jameshannagan7830 wtf are you on drugs?

sam ram noted.

in addition to this, planets, stars, and galaxies have been around for much longer and still continue to exist. the hell even is our universe? how come the earth evolved like this and etc.

true mammals didn't arrive on the scene until about the late triassic, stem mammals ruled before the dinosaurs

not really, since it takes time to find fossils. and also more and more people start cremating

@@baph1 I like this idea but seeing as there are 7Billion+ humans there would be lots of fossils anywhere in the world that is densely populated

@@baph1 bruh what 💀 it would be so easy to find human bones of that was the case

they'll find the face and butt implants and think it was a new hominid evolving

@@chateaupig826 fr

Barely,viruses are animals,but that's it,there is no more connection.

that dude was probably just a troll who liked arguin

@@Gasmaskmax It’s possible, but I’ve most certainly come across people who believe in it so strongly that they’ll do the same thing.

i dont understand when people pick and choose critical thinking. like first off why is the person using movies as a frame of reference. as if Jurassic park is an attempt to be a documentary. worst of all a lot of people dont realize its really not that difficult to make an educated guess based off findings. you can find out that an animal that went extinct many eras ago would have had feathers observing parts of its bones that would have had spots that feathers would sprout out from, and compare that with animals that exist today that have feathers that have the same function. im sure you can apply that to an organism's vocal chords. take into account the species, the genus, the size, the space in its throat, etc. whatever theyd use to determine what sound it would probably make.

Mammals weren't big enough although they might have eaten their eggs.

Such huge proto-mammals like gorgonopsids were long gone by the extinction of dinosaurs. Dinosaurs ruled for like 160 million years, survived extinction events like the Triassic one. The mammals didnt get any chance to evolve into something greater until after the meteorite.

Yeah, and phylogenetically its been established that turtles and plesiosaurs share an ancestor, and their clade(Pantestudines) shares ancestors with archosaurs, forming Archelosauria

@@demonking86420 Yeah, that's one possibility. Pantestudines is just turtles + all taxa closer to them than to lepidosaurs and archosaurs. I also saw lately an analysis that found choristoderes to be in the turtle stem-group. And then there is this whole issue whether parareptiles are inside Diapsida... There seems to be a growing consensus that turtles are diapsids and relatively close to archosaurs, but apart from that there is still so much going on in diapsid phylogenetics, I wouldn't be surprised if some of this stuff changes again.

@@pascalab5613 heck even in synapsids theres a lot of shit going on, with the clade Theria(marsupials and placentals) being more closely related to the extinct Multituberculates and other extinct Mesozoic mammal clades than they are to Monotremes and then there's the entire order of chiropterans(bats), with the microbat-megabat thing still up in the air

Thank you, that was bugging me too

@@demonking86420 That's a hypothesis not a fact

u thought that dinos were first animals? animals have existed since the ediacaran, where did u get that dinos were the first animals?

@@Tatusiek_1 Well I never put in much research into the topic and I found it very interesting because its something I never learned, I guess I just skipped the timeline or something?

So, rather than admit your errors and ignorance of the subject, and acknowledge my corrections, you ignore me and repost your comment, but amended. You cowardly rat.

@@Dr.IanPlect wtf are u talking about goofy ass

Wow that's awesome, what college do you go to?

@@mothlightmedia1936 Goethe-Universität in Frankfurt, Germany

wait.. are you talking about the next jurassic park movie?

ya it was an entertaining story... I want to hear more stories.

Love that series!

I think it is because it is just what you are not used to. Animals you grew up around probably seem normal and boring to you but stuff from other parts of the world are probably interesting and novel to you. The same is true for someone who grew up around animals you would consider foreign.

We know what we think we know

@RITVIK MENON There are amphibians that lay eggs on dry land, but in wet environments, just as many amniotes do. The amniotic egg probably evolved as a consequense of larger eggs, which therefore needed both support and a way to supply the embryo with oxygen. Once evolved, they couldn't go back.

Yes

Yes, unless someone finds an emapsid skull

Cotylorhynchus is the first, couldn't find the other one. I suggest you to search synapsids' page on wikipedia.

@@petervarga1207 Ah HA! Thanks! Frumpy lookin' thing, but kinda cute for it's size.

Yeah there's this bad habit of Vaccum sealing skin around the skeleton, when in reality very few animals, esp mammals have that sort of set up. Often times muscle and fat can totally change the look of a creature. Like baboons look horrifying based on their skeletons.

We should notice that pelycosaurs are a paraphyletic group, it is, it encompasses a common ancestor and some of its descendants, but not some sub-groups (in this case, therapsids). Dimetrodon is closer to Therapsida than it is to the more basal Ophiacodon, but both animals are pelycosaurs. This is why the term isn't as used nowadays

Yup, and someones (experts and non-experts) still using the term mammal-like reptiles, when this creatures never were technically speaking reptiles.

@@matiasdelgado7011 I juw saw a documentary that didn't include them jus said we were lizards then turned into shrus

@@xx-mx9mj the ture reptiles are eureptilia, technically anapsids aren´t consider reptiles too, they´re parareptilia or something else. Synapsids were stem mammals. Not reptiles anymore.

Yeah really people need to start recognizing that there is a large intermediate range. While the basal stem Archosaurs were likely fairly "cold blooded" the group started developing features associated with more active animals and thermoregulation well before the split that defines the "true" archosaurs" (i.e. everything that shared the last common ancestor of crocodiles and birds) even the later crocodylomorphs ancestor that managed to survive the end Triassic extinction had strong adaptations for a more active metabolism as well as a very small size able to fit in the palm of our hands from head to tail with a quite limber build. They later diversified with the lineage that adapted into aquatic ambush predator's sort of adapting back towards a more reptilian anatomy likely to conserve energy for their ambush predator lifestyle. Studies testing the rate of growth even show variation in metabolic rate with age in a number of dinosaur groups for instance young sauropod dinosaurs seem to have had a much more active metabolism than adults and this sort of metabolic variability persists in modern birds with some species able to slow down their metabolism to conserve energy in a state of torpor or partial torpor. For instance in winter chickadees slow their blood flow to their feet minimizing the amount of heat lost. There are even fish like Tuna swordfish and Lamnidae sharks and a few sea turtles which still have these kinds of intermediate metabolisms to this day not to mention there are a number of mammals with lower metabolic rates as a whole with monotremes sloths and mole rats coming to mind

@@Dragrath1 interesting

I heard that there were different types of dinosaurs, both cold blooded and warm blooded

I was wondering the same thing. I think the monotremes don't have fleshy ears, so maybe they evolved after they spread from other mammals? But because fleshy parts evolve so rarely, we probably just don't know.

Actually what I said probably is false, watched another video which taught me that echidnas probably evolved from platypus-like ancestors. This means that all surviving monotremes have an aquatic past, and aquatic animals usually don't have large external ears, so we can't conclude anything from that.

And I meant to write that fleshy parts FOSSILIZE rarly lol

@The-Argonian-Guy Well homeothermy and fur is present in both marsupials and monotremes, marsupials also have mammal glandes and even a sort of placenta ^^ The big problem is that hemeothermy and fur is not a thing you'll found in the bones ^^

Covergent

@@ayden6566 That's the one!

In the case of fossils, it’s all in the bones. Reptilian bones are different from Mammalian bones. That is why we can determine that Ichthyosaurus and Dolphins are not members of the same class even if they converged in very similar body plans.

@@ayden6566 CONvergent of SYNapsids

A lot of times we don't know for animals that old, because fossils are incomplete and we have no DNA to compare to anything, but we try to group animals based on that group all having a common ancestor with a certain derived trait. If many animals have the same trait, it's more likely that they all inherited it than that they all evolved it independently. There are some traits that are truly unique and only found in one group. Only mammaliaformes have ever evolved fur, and only dinosaurs have ever evolved feathers, but those traits don't tend to preserve well, so we have to rely on stuff like the shape of the teeth and skull.

Hey, today's wildlife would be crazy to ancient dinosaurs. If they were a bit smarter.

Mammals today would die back then and mammals back then would die today. They're cooler within their respective times 😎

@Daniel E. he refers to your biological specimen

Glad you recognize this, most religious people refuse to admit the Evolution Stuffs

@@chronoshindou9848 i think that s the case in USA. In Europe there are almost no creationists among religious people

@@karolkuter5194 well people in US are pretty arrogant about their religions