The Mammals that Lived Alongside the Dinosaurs

This video looks into the tiny mammals that lived in the shadow of the dinosaurs showing how diverse they were and explaining a little bit about how they evolved into their current groups.
If I have used artwork that belongs to you but have neglected to credit you please contact me so I can credit you.
If you would like to support me then you can do this via patreon: / mothlightmedia
Sources:
www.sciencedai...
www.researchga...
www.ncbi.nlm.n...
www.researchga...

[@ambassadorofpeboiv5366]

I love your channel, however I do have one criticism; your source for the flying icthyoconodons is um... controversial to say the least. The hypothesis and “papers” justifying the existence of ancient flying non-bat mammals were not made by a scientist and not peer reviewed, the author merely another David Peters in regards to behavior and production of crackpot ideas based on little evidence. Would suggest adding a disclaimer in the video description to let viewers know that the evidence for non-bat aerial mammals isn’t all that substantial as well as unlikely.

[@mothlightmedia1936]

that's a fair criticism, I did try to make it known it wasn't consensus but maybe I could have done a better job. I'll just pin your comment to let people know.

[@Koraxus]

As far as I can remember, before bats there were only gliding mammals. I don't remember their names but they were related to multituberculates. Those gliding mammals were much older than colugos, gliders and squirrels, so there's a slight possibility that if they had survived they may have eventually developed flight before bats.

[@ambassadorofpeboiv5366]

Mullerornis Please stop calling everyone you don’t like a neo nazi

[@povertychef46]

You're peer reviewing it right now.

[@ambassadorofpeboiv5366]

Mullerornis you could if you really wanted to but it won’t change the fact that I’m not a nazi

[@LordZero666]

I had never heard about mammals having night time adaptations as a group but it makes a lot of sense.

[@altonware1993]

Till today a great proportion of mammal species are nocturnal.

[@JanetStarChild]

Also explains why virtually all mammals have such a monochromatic color scheme (including humans); mainly just different tones of brown. Imagine diurnal mammals in the future evolving to be very colorful. We already see this in mandrills. Although, I think humans are once again forcing other mammals into the dark.

[@gustavosauro1882]

@@JanetStarChild including humans?

[@JanetStarChild]

@@gustavosauro1882 Yes. Humans are just shades of brown. We only make ourselves colorful through clothing, makeup and hair dye.

[@gustavosauro1882]

@@JanetStarChild oh God,I thought you were talking about vision,not skin/fur color

[@RobtheAviator]

I just want to point out how much skill it took for the artist to draw the thumbnail. The perspective from below the water required so much detail and precision. Great job!

[@Sea_Leech]

Normally people will just tell you "nah the dinosaurs took all the roles and niches, leaving mammals to all turn into rats and crap" but they were so much more diverse than i could ever imagine.

[@peculiarjack617]

And they said dinosaurs lived longer than mammals

[@Magenta.000]

100 million years ago Primates and Rodents have already split from eachother which is crazy

[@Natasha12productions]

I'm glad I came across this channel. Just a few of his videos have opened my eyes to more about prehistoric animals. The dinosaurs always have had the spotlight. So it's nice to learn about new things.

[@sonicroachdoggjrraven3263]

“Turn into rats and crap” lol

[@S3verusMyG]

@@peculiarjack617 yeah they did, longest living successful creatures

[@alluringming]

Funny how the documentaries that talked about dinosaurs in the era they live in never touch the mammels. This was and enjoyable learning experience

[@mude_13]

It's really not that odd when you consider that dinosaurs are, in scientific terms, fucking awesome.

[@matthewbrown8679]

Thanks for the video. One minor correction: most non primate mammals do see color; just not as well. Mammals lost 2 of the 4 primary colors their therapsid ancestors had. Old world primates gained the ability to see a third primary color. It's a bit more complicated with new world primates.

[@connorhaley3190]

What is the fourth primary colour

[@MrCaptainTea]

@@connorhaley3190 I want to know too

[@ekosubandie2094]

@@MrCaptainTea I believe it's Ultraviolet (UV) color

[@oerlikon20mm29]

@@MrCaptainTea pop an LSD and find out

[@lespyguy]

@@ekosubandie2094lucky bastards, guess we’ll have to genetically engineer ourself’s to see uv again

[@GreenFors]

Oh man this is good stuff. I will throw you a dollar on patreon just so that I can brag about being your 4th patreon when this channel gets big.

[@Totalinternalreflection]

How does it feel now? :)

[@meghanachauhan9380]

Hehe everytime I take lsd: oh man this is the good stuff

[@SecularDarwinism]

This aged like wine

[@bruhspenning]

👉✋

[@Ben-pv8uq]

My man really bought low

[@garymitchell9848]

My new, favourite "evolution" channel! Great vid on an often overlooked subject in paleontology. Thanks.

[@perrynnlynch1883]

Good comment .

[@felix25ize]

But I still stay a fan of PBS Eons.

[@yrok244]

@@felix25izeI love PBS Eons man.

[@felix25ize]

@@yrok244 Yes, as much information than the others of the kind, but many more charming ...

[@katyungodly]

@jack no, u

[@jacksonp2397]

Its so sad that this video dodn't get as many views as your last two. You are an excellent source for all things prehistoric. I am so glad you are here on KZbin

[@mothlightmedia1936]

Thank you, it means a lot

[@lightningboltt5437]

@@mothlightmedia1936 have you heard of pbs eons

[@DonBlueberry]

I knew mammals walked alongside dinosaurs but I didnt realize for how long. Its almost insane to separate the two anymore. Such a neat video.

[@Tatusiek_1]

During the permian period, mammalian ancestors were quite dominant

[@ArmandoEnfectana-bp6jo]

​@@Tatusiek_1, And the Dominance stop in the late Triassic after the Dinos appears.

[@billking1418]

Thanks for making a video on prehistoric mammals

[@Sapwolf]

I was walking my dog at night and we saw a possum. Imagine seeing an animal that was around when the dinosaurs were around at the end of the Cretaceous Period. I wonder if my dog and I have a new found respect for our mammal brother, and their tenacity, and their strong family values to protect young during the dinosaur period. So much drama, dedication, and struggle. Thanks.

[@carlosvelasquez2625]

Best comment

[@vichy7661]

Possums reflect some of the most peaceful species on the planet, they don't get or transmit rabies, they don't bite if confronted, totally nocturnal, you can grab one in the wild without fear.

[@dimetrodon2250]

@@vichy7661 Excellent at acting though. I don't just mean the playing dead thing, they'll hiss and act dangerous if they perceive you as a threat, and their long messy fur makes it difficult to tell just how big they really are. They take full advantage of being able to bluff their way out of danger.

[@vichy7661]

@@dimetrodon2250 add to this a remarkable ability to adapt to different environments, thriving in metro areas, deep swamp woods, medians between interstate highways, and the cretaceous Era. Must have an incredibly varied food choice,,,they have to eat whatever is available, from millions of years ago to now. Guardians of the Galaxy is looking more serious than a comedy now.

[@mortkebab2849]

Yes, they were rummaging through dinosaurian trash cans.

[@burakbalkc685]

Found this channel about 2 weeks ago via reddit and literally watched every single video. Great content! Can anybody recommend any other channels that makes videos about evolution such as this one?

[@HenrythePaleoGuy]

Don't know if you're already subscribed or not, but I'm one.

[@krrowthemyuii]

A channel called E.D.G.E.

[@jolcolwack529]

PBS Eons

[@florix7889]

@Ícaro Ballarini trey isn't that good

[@zhubajie6940]

As we find more and more fossils, it is fascinating how "bushy" the Mesozoic mammal family tree was. As with more recent fauna, gone are the simple one specie lines (such as the 19th-century horse series or the 1960s Rudolph Zallinger's "The Road to Homo Sapiens" come to mind) and the ever-decreasing number of ghost lineages than we had say mid-20th century.

[@AndreastheRed]

Found your channel through Reddit (I think) a week ago. Loving your content, keep it up!

[@sliskekeeling]

So have I. We probably clicked on the same link

[@GreenFors]

Was it the link to the elephant video?

[@AndreastheRed]

@@GreenFors Yeah! It must have been from one of the nature metal subs.

[@jacksonp2397]

@@AndreastheRed r/evolution has links to all of his videos

[@maxheiliger6693]

Same here

[@DreamSneak]

I literally just subscribed and you immediately post a new video... that's excellent timing. Loving the videos so far, keep up the good work.

[@mothlightmedia1936]

Thanks for the sub

[@NocturnalPyro]

This channel is a gem hidden in the rough

[@jefflormans5441]

The amount of work that you've put into these videos boggles my mind. Amazing. A minor complaint I would make would be the way you acknowledge the creators of the various artwork shown. It's a bit confusing. The text changes in size depending on how much of the screen the artwork covers so that sometimes the artists name looks like an acknowledgement but other times it looks like it's part of the narration. I'd suggest changing the font size so it appears a consistent size, give it a unique color to differentiate it from the editorial text and give it a prefix like 'Artwork by'. Thanks.

[@albatross1688]

I believe the mammals, who were generally much smaller, likely survived for the same reason some of the avian dinosaurs did: they didn't require as much in the way of food. I think what really killed off the non-avian dinosaurs and other big creatures was the dying of many plants. Some plants survived, but not nearly enough for big herbivores, whose survival was also necessary for big carnivores to have enough to eat. Being smaller would have been a huge advantage at that point in time.

[@AmanRishitwenty15]

Hope KZbin algorithm works real quick. Nice channel.

[@aquadragondavanin6745]

i did not expect that about opossums! what a curveball!

[@Soilfood365]

'All the gliding mammals today are herbivorous' - Anomaluridae are at least occasionally inclined to snack on insects, and I've been told that at least one population (Mkushi, C. Zambia) are regular raiders of birds' nests (anecdotally, but fits their environment which is more dry woodland than rich fruiting forest)

[@Ndub330]

Your channel is awesome, you deserve much more subscribers ! Keep up the good work, loving it

[@dru4670]

Now i see why we have an ego, for the longest time we were underdogs just bloody rats!, we were prey for the longest time.

[@slamyourheadin9449]

Did you even watch the video?

[@Zabi-S]

This video was very informative. There’s very little material in the media about Mesozoic mammals. Thanks for this video. Your channel is amazing. Perhaps a thylacoleo video sometime down the line?

[@MrSaemichlaus]

The artwork and animations are outstanding! Archaeologists are messengers of the past.

[@alexvirago9072]

I absolutely love your videos, I found you through reddit a month or something ago, and I'm so glad I did!

[@RedChaosScrungle]

Correction: Repenomamus was found with a juvenile psittacosaurus in it's stomach, not a therapod.

[@LeolaGlamour]

There’s always that one

[@slamyourheadin9449]

@@LeolaGlamour what’s wrong with correcting the information?

[@aggressivelyamicable5987]

@@slamyourheadin9449 Years of participation trophies has conditioned people to believe that any criticism is an afront to their existence.

[@Kubson1988]

I’m glad I found this channel, very interesting topics!

[@zgunz18]

So my DNA has had been a nocturnal for 160million year and diurnal for 66million year? No wonder I always feel sleepy at day time and energetic at night time.

[@Belikel]

Billions of years for evolution and you still couldn't come up with a better joke?

[@MrCaptainTea]

@@Belikel it wasn’t a joke it was an observation. An interesting one too.

[@MybeautifulandamazingPrincess]

Wrong. Humans were created by God less than 10 thousand years ago. Which is the age of Earth itself

[@danicaersland3686]

These videos are so calming and nice, I use them to fall asleep.

[@Clearlight201]

Moth Light thank you so much, just like the mesozoic mammals this awesome and fascinating video filled a niche that needed to be filled. Loved it !

[@yonilevi4721]

Wow thank you for the cool videos, i just saw the patreon link ! I would love if you can make a video about how scientists gather and interpret the fossils and how many fossils we have, how speculative are fossils for each era, what methods are used and stuff! Thank you once again for the videos they are digestable for a non scientist person like me :)

[@lewishiggins393]

This channel has literally changed my worldview

[@aves4081]

Very informative and interesting to watch. I also love the selection of pictures as they are beautiful!

[@Sapwolf]

Dinosaurs are cool. But I find that learning more of mammals and their ancient struggle to become....me is closer to my heart.

[@saffronevans3665]

i am glad i found this channel, i like it very much. You have clear enunciation and a very good script!

[@welcometothemonkeyapezone7797]

Mindblowing one of those depictions of small rat-like creatures could've been our (humanity's) direct ancestor. As in your great-great-great and so on grandparent.

[@gearandalthefirst7027]

I mean, keep going farther back and eventually you're a bacteria

[@Eli-ns2oz]

@@gearandalthefirst7027 not really, no. Our ancestors (the first eukaryota) split from the LUCA before bacteria evolved.

[@freandwhickquest]

@@Eli-ns2oz we probably evolved from an archaea which swallowed an alpha-proteobactetia. Host cell (archaea) transformed into euchariota and bacteria transformed into mitochondria.

[@soldiergigas14]

I love the music in this video. It would fit so well in a documentary on the evolution of life. :)

[@hando4880]

Dinsaur : Predating the mammals for millions of years Random space rock : Hit earth Mammal : S T O N K S

[@creeperboy5486]

Because of this channel, I would have never known there were used to be 5 MAMMALIAFORMES! This is SOO COOL!😱 and interesting🤓💓

[@rubenb8653]

Great choice for background music my man. Really vibes with me!

[@harrietharlow9929]

I really love your videos. Thank you for posting. They are informative and very nicely done,

[@mothlightmedia1936]

Your welcome

[@mortified776]

I just subscribed yesterday, but we have to get you more subs. 7.3k for content of this quality is an injustice that cannot be permitted to stand!

[@SohanaHaider]

I wonder why the algorithm doesn't push this channel more :( it deserves more attention.

[@discobldbath88]

It’s the music in the background for me! So cute

[@ginstars]

what music do you use in the backgrounds for these videos? i really enjoy it! would def use for studying

[@jadinaneptune6585]

Really liked your video! I wanted to comment just saying how much I love nature and animal doccumentaries, but after reading all the comments I realized I legit know nothing in comparison lol

[@court_appointed]

Thank you KZbin recommended for making me aware of this channel! Thoroughly hooked!!! Currently an postgraduate doing masters in zoology in NZ and this video is basically a recap of all the stuff I learnt last year!

[@DragonFae16]

It'd be interesting to know the way those extinct lineages of mammaliaforms reproduced. One of them had to be the transition between egg laying and retaining the embryo internally. That means there likely was a ovoviviparous lineage.

[@connorhaley3190]

I’m pretty sure he made a video about that not too long ago.

[@glenngilbert7389]

Fantastic content and presentation of research.

[@hotsuace24]

The music playing in the background..... It's tranquil sensation is well placed. Did you mixed it your self or are using someone elses music? Also... I have subscribed.

[@christopherfitch7705]

Great subject matter super cool artwork so many different species in so many diverse habitats and extra points for excellent background music

[@Kopie0830]

Wonderful Channel. So professionally made.

[@501meganinja]

Just found this channel, it’s really good!

[@verward]

Man, I just want to say, thanks for the videos. I've really enjoyed them.

[@jacksonp2397]

I would like to support you on patreon but I'm 15 and unemployed, but one day! Keep up the good work!

[@Somi88100]

I just saw your videos adn chanel for the first time..and they are good...keep up the good work...I will watch all of them :)

[@bisakhbarman7344]

Well, at 3:19, it really should have been pronounced "volaticotherium", not "volacitotherium"...The video is overall really a rare jewel...since our mesozoic mammalian ancestors and their fossil kin really deserve some light shed on them.

[@toniodivichi5749]

Happy to find your channel. You've earned yourself a subscriber.

[@KAZVorpal]

It's worth note that the proto-mammal ancestors of mammals were often MUCH larger than dogs, some as large as medium-sized dinosaurs. Before the extinction event that started the Triassic, those stem mammals were THE dominant life form. And they had many of the traits of mammals. So many, that we're not exactly certain what proportion of traits existed back then. They've been thermoregulating since at least dimetrodon...which has another mammalian trait described in its very name: Two-sized teeth. Tooth specialization is a mammalian trait. The synapsids who ruled before the dinosaurs may have been so mammal-like that if we saw one, we'd think it WAS a mammal. We don't know whether therocephalians like glanosuchus had hair, but given the signs that they were endotherms they probably did, and if so then they'd just about fit into a modern zoo as a mammal, without visual distinction.

[@elijahbaird6678]

You are the reason I'm going to pass biology

[@romanbarna1316]

Karim carrying this channel on his back since 2019.

[@FlufyfilmzStudi0z777]

I really like and appreciate this content. Keep up the good work man. You're doing the Lord's work, and I honestly enjoy your content. It soothes me to watch your vids.

[@purplesam2609]

These videos are super helpful for my worldbuilding project

[@Lemagliedileo]

Could you do a video about bat evolution? I'm obsessed with your channel.

[@mothlightmedia1936]

Yes I think that would make a great video

[@Lemagliedileo]

@@mothlightmedia1936 I've since seen videos of yours where you mention a pterosaur that functioned in a very similar way and an unrelated bat-like mammal that existed before, but nevertheless it's still interesting!

[@mason6883]

I didn't realize that Possums have been around for that long in this form!

[@shinaniganz4453]

I think a video about how primates gain more colored vision would be great

[@brattyprincesses2286]

I really enjoyed watching this video

[@354sd]

Its not everyday you learn something new like this

[@pac1fic055]

A vídeo on the adaptations that allowed birds and mammals to survive the KT event would be fantastic.

[@ExtremeMadnessX]

...and reptiles and amphibians and fish...

[@pac1fic055]

Extreme Madness - naah. Those critters don’t matter.

[@pac1fic055]

Extreme Madness - mammals and birds would have been very vulnerable to the aftermath of the event. Hence the specific question.

[@isaacbruner65]

Probably the main thing is being generalist omnivores. Generalists do best during mass extinctions, specialists get fucked when their environment changes. Specialist bird and mammal lineages were wiped out as well.

[@CherryBotV2]

burrowing, flight, omnivorous diet, and not needing to eat or move around much.

[@r.shankarashrishsujay2822]

Repenomamus are same as the size of Badgers and ate small dinos, wow no wonder wolverines and Badgers are so ferocious and doesn't care about larger predators than them at all , fearlessness is in their dna 😂

[@HalloranIllustrations]

Nice to know that there was a wider diversity of mammals then just fluff balls or shrew like.

[@Kroggnagch]

God i wish i could go back in time in some bubble that would keep me from interacting directly with anything and vice-versa, and see the dinosaurs and how they truly looked and sounded, and maybe even see ones we have no idea existed because we have no fossils of them... man that would be so epic.

[@georgesalles582]

great channel! it remebers me the pbs eon channel haha.. i hope your channel grow a lot

[@wrightgregson9761]

your music is lovely but wonderfully hypnotic.

[@KAZVorpal]

"Partial warm bloodedness" is known as mesothermy. A simple way to think of this is the ability to raise their body, temperature, but not needing to remain at a fixed thermal point like endotherms.

[@jeffbenton6183]

6:20 At this moment all I could think about was: "He's a semi-aquatic, egg-laying mammal of *Action!*

[@loading5162]

This channel is my KZbin gem

[@firearmsstudent]

1:22 "Unable to compete" LMAO

[@DavieMahon]

Just found this channel, great content

[@dmanzawsome]

Its kinda cool how the group of animals the take the less dominant roles gain interesting survival skills that let them beat out the more succefull guys over time

[@berendtw3595]

What song is used in the background? I like it

[@mothlightmedia1936]

I can't remember the name of it but it's by a youtuber called badsnacks and can be found in her no copyright album

[@manuelcoronamedina]

kzbin.info/www/bejne/l2KTk2iZpL5_fM0

[@arthurfields9575]

No wonder Opossums are so strange looking and evil like, they lived alongside the dinosaurs. Very informative video.

[@MultiTomtom23]

I thought just Ben g Thomas would make such nice videos... But your videos are excellent too... I enjoy them very very much... Keep up the good work!!

[@therivergod849]

this channel is cool..very fascinating, thx!!!!

[@klasky123]

What is the music playing in the background? Very nice!

[@notquitenil]

Out of curiosity, would anyone know the music used in this video? I've been interested ever since I found the channel some weeks ago, but haven't been able to locate it.

[@9MileBros]

Great video brother.

[@graciliraptor3990]

This video is truly amazing, thank you so much!!!

[@jeffbrehove2614]

What I'm more interested in was the transition from reptiles to mammal. How did they change from scales and eggs to fur and mammary glands

[@isaacbruner65]

I read that mammary glands probably evolved from sweat glands, and were originally used by cynodonts to keep their eggs moist, and hair probably evolved from whiskers, which originally evolved as sensory organs analogous to arthropod antennae. It's impossible to say for certain, though, since these features typically don't survive in fossils.

[@Cobbido]

There were probably lots of "mammals" that fed on dinosaurs, man I wish I could gaze into the past

[@arnaldorentes5371]

A massive thank you!

[@ForthRight]

Good job on the video! I found you on Reddit

[@metal87power]

How's that beautiful, enchanting soundtrack called??

[@MrColuber]

When you mentioned Repenomammus, you forgot to mention the evidence showing that the tooth marks of a Deltatheridium were found on a Maniraptor's skull.

[@adrianokury]

A suggestion to increase the usefulness and comprehension of the text is to write down the scientific names mentioned. This way people can also do their extra searches.

[@amehak1922]

Amazing is an understatement.

[@ambergris5705]

7:25 : so Ice Age 3 is actually true!

[@aguy7848]

To think, beneath the feet of the dinosaurs, the sleeping giant of evolution was hopping around as little more than an annoyance or a snack.

[@botezsimp5808]

Maybe insects like the cockroach is similar to mammals during the dinosaurs? As we are just a stepping stone for them lol 😆