Please do more videos about extinct marsupials! It might be because I'm Australian and therefore biased, but I feel like the extinct fauna of Australia just doesn't get enough love outside the few well-known ones like Thylacines. Your videos about them and the Thylacoloe were awesome, by the way. Which is why I'd love you to do more. Maybe you could do a video about the evolution of macropods or vombatiformes?

@dr.polaris6423

Жыл бұрын

Glad you enjoy those Aussie themed videos. I do certainly plan on covering more Australian animal groups, especially those from the Pleistocene.

@tristenallen6693

Жыл бұрын

Not just marsupial austrila during the cenozoic had a surprisingly large amount of funa from giant herbivorous turtles to weird echidna like animals as tall as a toddler

@hailgiratinathetruegod7564

Жыл бұрын

Don't lie. You ain't australian, since Australia does not exist in real life

@canis2020

Жыл бұрын

I'm not Australian and I agree. Because they are criminally underrepresented

@Svensk7119

Жыл бұрын

@@canis2020 Oooooooooh, gooooooood pun!

I know some people would love Epicyon as a guard dog.

@cgyoboi

Жыл бұрын

Gaurd dog? I'd like one as just a family dog

@manzac112

Жыл бұрын

@@cgyoboi Or something like that. Yeah.

@mhdfrb9971

Жыл бұрын

@@manzac112 the closest we can get today are the Kangal or Alabai shepherd

@uncannyvalley2350

Жыл бұрын

Look up Dogman Encounters Appears they're still around

@etinarcadiaego7424

Жыл бұрын

@@uncannyvalley2350 but there are many clear differences, such as upright gait and probable sapience. Though, I feel dogmen are living animals that evolved, not demonic, spiritual creatures.

The idea felids arrived from Eurasia and outcompeted borophagines ignores one major problem: felids invaded North American from Eurasia at the start of the MIDDLE Miocene (putting an end to the so-called Cat Gap), while borophagines actually become more diverse and evolve into large predators during the LATE Miocene. Borophagines became big predators in spite of pre-existing felid competition, not because of the absence of said competition. This is one of those “animal X was better at existing in a niche than animal Y and outcompeted animal Y” hypotheses that was based entirely on unfounded assumptions about which group of animals was “better evolved”, and is outright contradicted by the timeline of the fossil record.

@beastmaster0934

Жыл бұрын

And Dr. P even mentions that the borophagines lived alongside Amphimachairodus, a giant felid. And the large barboroufelids. You’d think living alongside those two feliforms would give the borophagines some kind of knowledge on how to deal with large feline-like predators It seems more likely to me that when the climate changed, and open woodlands transformed into open prairies, The borophagines simply weren’t adaptable enough to survive (other than Borophagus.)

@bkjeong4302

Жыл бұрын

@@beastmaster0934 basically.

@UniDocs_Mahapushpa_Cyavana

Жыл бұрын

Most of the literally big cats 🦁 in North America are descended from small cats 🐈, so it probably took a while to reach the sizes and internal changes to compete with the Borophagines. Well, the obligate hyper carnivorous ones. Who where basically offshoots of the generally more successful facultative omnivores Canids usually are due to niche partitioning. I presume the omnivorous ones actually faced competition from the modern lineages of Canids. Even wolves 🐺 are pretty generalist and can easily survive as adults on things like carrion and small animals, which large cats really cannot. The main issue was probably that Borophagines were one of those silly offshoots that happen due to niche partitioning that at least for a long time suck at it. There are a lot of them.

@bkjeong4302

Жыл бұрын

@@UniDocs_Mahapushpa_Cyavana Borophagines were tiny when cats showed up in North America, to the point that some of the first North American cats were much larger than the borophagines they encountered. It was only much later on that borophagines got big, and that was-again-AFTER North America had plenty of large cats.

@UniDocs_Mahapushpa_Cyavana

Жыл бұрын

@@bkjeong4302 Epicyon was the largest Borophagine and the largest canid 🐕, but it lived before (and after) the arrival of cats 🐈 9 million years ago. Wolves 🐺 don't directly compete with cats 🐈, as wolves are much more versatile, whereas cats are more (but not very in absolute terms) specialised.

Being the largest canid EVAR, it's surprising I haven't seen a lot more popular info about this genus over the years

I love how you seem to put your new content out right before I go to bed so I can listen to them like a bedtime story.

It is incredible how much more diverse was the world before North America and Eurasia were first united by that proverbial intermittent land bridge. Awesome video as usual. Always a pleasure to watch.

Always enjoy your videos Dr

I'm so glad you did this, my cousin watched a upload awhile back from PBS Eons about this and found it awesome.

Great as always. It occurs to me how sufficient drawings can be. Like reading a novel or story is actually more VR than any device could ever trigger.

Facts Love the videos though, short and sharp with plenty of visual representations makes it soo much easier to take the info in

@dr.polaris6423

Жыл бұрын

Thanks, that was always my aim with these videos.

I would love a video on triassic stem mammals! Also love to see a video about my favorite extinct canid species!

Always love watching your videos, so much neat stuff to be learned 💛 But I did notice a couple times you'd mentioned a species was plantigrade, but the image shown was digitigrade. Slightly confused on that

@dr.polaris6423

Жыл бұрын

Thanks! Sometimes I really struggle to find any decent images of the animals in these videos, so I have to settle for some that are not 100% accurate.

@bkjeong4302

Жыл бұрын

Borophagines were digitigrade, but often significantly more robustly built than extant canids.

We don't see enough of you Dr. Polaris.

Thank you very much! They are fascinating animals and I learned a lot.

We need a proborhyena one

@dr.polaris6423

Жыл бұрын

Great idea!

@KaijuFan1954

Жыл бұрын

I agree

@douglasthescottishtwin3989

Жыл бұрын

@@dr.polaris6423 Are you going to make a video on sparassodonts?

@dr.polaris6423

Жыл бұрын

@@douglasthescottishtwin3989 Yes absolutely.

@douglasthescottishtwin3989

Жыл бұрын

@@dr.polaris6423 Also, FYI, please block @Indy Reno for spamming taxonomic misinformation, it's getting pretty annoying with him.

Love it when you upload, doctor. Reckon we could get an episode on synthetoceras at some point? I feel like hardly anyone talks about them.

Insightful and informative, as always.

Awesome, thanks. Can’t wait for the therapsids

I had a poodle x terrier who used to climb the trees to eat the almonds in our back yard.

I love your videos and the depth of information. But damn the award goes to you for scientific name pronunciation.

Great content, as usual. Thanks Doc!

great video as always! keep up the awesome work :)

Always something new covered worth watching

Cynarctoides and Carpocyon - the grape crushing dogs 🐶🐕😁

I love these video series. Is there a video covering when about the time periods were, like Miocene, Pliocene periods and such.

An excellent presentation on a fascinating branch of the dog family tree! Thank you, Dr!

Can you maybe do a video on ummmmmm elephantidea maybe? If you haven’t done that already please? Just an idea

Very informative, thank you.

Amazing animals! Thank you for making this video.👍

Hi Dr Polaris, in relation to your Alter Earth Project, what’s the largest land predator during the Holocene? And what does New Zealand’s fauna look like? Also, how are pterosaurs doing by the time of the Holocene?

@beastmaster0934

Жыл бұрын

It would be ironic if New Zealand was dominated by mammals on Alter earth. The reverse of how it was on our Earth.

@victorabaderamos6019

Жыл бұрын

@@beastmaster0934 Funnily enough, there is an island dominated by mammals in his project, but it’s Madagascar (there they can grow up to 700 kg!)

I'm always eagerly waiting for your video's. I love your contents . Lot's of information's Love from Bharat (India) 🙏❤️🌹🇮🇳 # Can you please make a Wildlife ( Paleo Zoology of Fiji )

Will your series on the speculative evolution for dinosaurs if they had never become extinct at the end of the Mesozoic Era make a return in the near future? To be frank, I quite miss that series of videos as they were, and still are, very interesting to listen to.

*"Survival of the fittest, SpongeBob. Survival of the fittest, hehe."* - Mr Krabs

Could you do an evolutionary tree video on pinnipeds? I've looked through your channel and I can't really find anything... but u have done dog and bear videos so the seal family seems to be left out 0-0

Really interesting, and beautiful art.

Hi i love your videos! Can you recomend me some books about animals in cenozoic?

Also thank you for doing the conversions from Kilograms to Pounds. I really have a hard time with that at most times

I'm glad you keep making videos, and continuing to post on DeviantArt, but this long absence of Alter Earth videos is getting to me. Please feed us more Spec Evo.

I hope you do a video about Dinocrocuta gigantea.

Hey man I found your channel about a week ago and I never have learned about any of this in my 29 years of living. I appreciate your effort and consistent videos since I started . If you have a Patreon I will donate , or if there is another way I can send you some money let me know. I have Chime and cashapp but not sure if those work in your country(I am in NY) . Thanks bro 😎

5:54 - This one may be a fierce hunter, but something about it makes me want to ask, "Who's a good prehistoric boy?" 7:28 - I've have a soft spot for this big fellow ever since I first learned about him/her!

I love dogs and this video was really cool

Hey polaris, have you considered making a video on varanids and their unique evolution?

@beneficent2557

Жыл бұрын

He may have already.

the Otarocyon looks so adorable! I wish it was more popular!

Urocyon is very interesting. So many interesting New World canid lineages like the "Dire Wolf."

Could you do a thing on fossil species? Lazarus taxa and things that have just been here for long times? And like the Aussie requesting more marsupials, thus Amerie would love one on Giraffeoidea, particularly all them dead pronghorns. And one on all deer species, por favor.

Epicyon would have been the ultimate guard dog if you could gain control of it

Is your spec evo project done?

nice

8:09 this animal was also the size of a lioness as well and Built like one too

Would love to see a video on the genus’s of the cave bear or just the bears of the past

@DemitriustheWolf

Жыл бұрын

I wonder what those coyote to lion sized Borophagine dogs are mostly like wolf sized !

@Dr.IanPlect

Жыл бұрын

genera, not genus's

Epicyon Ma boy!!!

I had read an article affirming that "science has proven: cats are better than dogs" due to this borophaginae extinction, those tabloids don't even consider the survival of other canids in north america or even how canids invaded Eurasia too. Felids had way more time evolving into the ambush type of predator, accumulating adaptations for way longer than the dogs. When competition began they were at a natural disadvantage. Cursorial predation is the way most of the canids have a better success rate.

@UniDocs_Mahapushpa_Cyavana

Жыл бұрын

Cursorial only really works well in Canis 🐕 due to their sky high emotional intelligence, meaning they can tell when a prey 🦌 weak due to things like starvation or pregnancy and focus down the weak members at the beginning of running. Otherwise, a random pick would lead to a lot more failure and more importantly variance in successful kill rate/unit time.

It seems caniforms are prone to evolving omnivorous diets. Even the dhole, a canid with extremely developed carnassials, still readily consumes fruits and vegetables.

Do Thylacosmilus Or Andrewsarchus

When did carnivores first evolve retracting claws?

Nice so they're basically prehistoric pitbulls 😂❤❤

"I have a bone to pick with you."

I have always wondered why Borophagus did not survive into the Pleistocene epoch? After all, no hyenas of a similar niche as Borophagus ever entered North America, therefore Borophagus could have been the sole occupier of the spotted hyena-like niche in North America.

I am curious if borophaginae dogs more often roar like maned wolf or howl like true wolves.

@etinarcadiaego7424

Жыл бұрын

If they did roar, it would basically be "An American Werewolf in London" in real life.

This is because of the Tephrocyon is 80 ibs actually probably !

Hi Dr Polaris

Mark Twain nailed it right. When he said it about size of a dog or the ancestors of the dog's.

Epicyon is one of my favorite prehistoric canids I heard that they were responsible to wipe out the last bear dogs amphicyon also yes that is correct the cats did out competed epicyon.

Canids … yessssss!!!!!

Oh no! Your outro "Cheerio" was cut off! Much sadness. Imagine if by some magical scientific miracle the largest of these species was resurrected? Should they be reintroduced to suitable areas of North America to fill the vacant ecological niche? Would they make nice pets? No left over bones after a traditional Texan or Argentine BBQ!

What is the relationship between Dholes and African Painted Dogs? How close are they really?

@Dr.IanPlect

Жыл бұрын

Pretty close; both within the tribe (only a bit more inclusive than genus) Canini. Within which are 2 main ancestral clades and they share the same clade within that.

🤠👍🏿

Ruff!

Bone Crusher Dog no match for Iron Mike!!!!💪😀🥊🥊

I wonder who was bigger, the biggest bone crushing dogs or the dire wolves?

@777Electric

10 ай бұрын

Dire wolves were slightly bigger than most northern wolves, but Epicyon haydeni was bigger than a jaguar. Epicyon is therefore much bigger than any dire wolf.

@S.F157

5 ай бұрын

@@777Electricthe size of a lion

💓💓💓💓💓💓💓💓💗

👍

Yeeesssss

Big puppy. Dadaist remarks aside, I am a big fan of alternative history thought experiments, little what-ifs that creep in, and I wonder... had an animal similar to epicyon persisted into modern times and presuming a pack hunting mentality... would they have been too large and unwieldly for domestication or would the native peoples of the Americas ended up with a pseudo-dog that put even the large mastiffs of Eurasia to shame? Aside from butterfly effect arguments I don't think it would make a huge difference but it is a fascinating concept to me. A proper domesticated caniform might even reach larger sizes. I am just saying. 'Wolf' cavalry.

@etinarcadiaego7424

Жыл бұрын

They're basically real life wargs.

real life wargs

MAYBE PRONOUNCE WORDS CORRECTLY

The big cats may have contributed to the extinction of the bone crushing canidae species. But now the tables have turn on them in the later Holocene thanks to humans helping the domesticated canines. Ironic.

@S.F157

5 ай бұрын

If that was true how did they compete with Barbourofelis & Amphimachairodus? Both existing within the same time period in North America. Also doesn’t match with the fossil records so definitely inaccurate.

Wont