The Traits That Spawned the Age of Mammals

Lots of the traits we think of as defining us as mammals show up pretty early, during the time of the dinosaurs. And, in some cases, they show up a lot earlier and in things that weren’t mammals at all.

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[CuriousArchive]

Crazy that almost every mammal from whales, to elephants, to humans came from the same few rat-sized species

[rl]

Dinosaurs: (dies)

Mammals: “Feeling cute, might become the dominant species on earth later”

[ColumbiaB]

Kallie may set a record here for the amount of complex, difficult information condensed into eight minutes in a forum for popular consumption — while maintaining a reasonable degree of clarity.

[Evan-rjxy]

". . . because the dividing line between true mammals and the not-quite-mammals is actually kinda -blurry- _Fuzzy_ "

Fixed

[Googledeservestodie]

All early mammals look like if you ask a drunk college student to draw a rat from memory

[libraryofpangea]

Request:
Please cover more Paleomycology (ancient fungi ), it's highly underrepresented & neglected while mycology is going through a renaissance at the moment.

Thank you!

[Carcharodon]

Asteroid: **exists**
Mammals: *I see this as an absolute win*

[Random_Nobody_Official]

watching this felt like one minute,
rather than the real eight minutes.

[Philoreason]

you're saying the bone inside my ear were actually jaw bones a long time ago!?? wow

[aaronareese]

Non-avian Dinosaurs: *die off*
Mammals: “It’s free real estate!”

[ValVonRhine]

I still expect "...and Steve!" at the end. 😔

[Jake-pnwr]

I find so much peace and solace in this channel. Such a nice break from the headlines crowding today's news.

[byrdman]

Could you guys do a video on the evolution of color vision? And also explore why mammal's color vision in particular is so underdeveloped for the most part compared to other amniotes.

[bloodandempire]

This is my favorite show of all time 🥰

[sydposting]

Last time I was this early, cyanobacteria had just learned how to photosynthesize.

[prasanth]

The fact that we can able to uncover the history of earth and pre historic animals with the help of a bunch of rocks and fossils is mind blowing.

[minecraftstation]

Everyone hating first amphibian for being the reason of our existence while ignoring this....rip

[jakobraahauge]

And hosted by everybody's favourite fossil librarian 😄 thanks! Hope all of you at PBS Eons will have a splendid summer! Loads of love from Denmark ❤️🤗

[EebstertheGreat]

Random question about crown groups: if the tuatara goes extinct, will crown lepidosaurs become synonymous with squamates? After all, all extant lepidosaurs will then be lizards and snakes. That is, since crown (and stem) groups are defined by living representatives, do their definitions naturally change over time, as species go extinct? Or once defined, is a crown group fixed?

[iansilva]

This is by far my favorite channel of all time, I have been looking for something like this for a while, a channel that could provide me relatively complex scientific information and facts in a clear, concise and well spoken way and this is EXACTLY everything I was hoping for to find. Thank you for your amazing work and efforts to bring us these awesomely interesting paleontology facts PBS Eons!!