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I'm a non-scientist who's very interested in understanding how life came to be in all its diversity. For a couple of years now I've been particularly fascinated by the Ediacaran and the subsequent Cambrian explosion. I've done some rudimentary reading and watched quite a lot of RUclips videos, many too simplistic and others too advanced. This lecture does the best I've yet come upon at providing a decent amount of clarity as to how the Edicaran provided a stage for the Cambrian. Thank you.

Very nice.

I can't fathom what forces of natural selection made prototaxites grow so tall.

Please make more, these are Great! 👍

Awesome! Now let's find some investors!

Very nicely done!! Go geologists!

Creationists can't comprehend that related animals have a suite of shared morphological characterists that link them together into nested hiearchies. They think animals are hobbled together from a set of fixed things like lego heads, bodies and limbs. This is why they ask 'where is the half wing?' or 'where is the croc-a-duck?'

Rest assured that not all Creationists are zealots who take the Bible literally. I personally love Evolution as the mechanism of Creation; it's much more in line with God's _modus_ _operandi_ than the literalist narratives of fanatics are.

Creationists be like "NUH UH!"

Amazing series!!! I wish you still posted these kinds of lectures, but thank you so much still for the ones you did post!

Thank you so much for this fascinating and enlightening series!

Please use 'alga' when the singular is appropriate, not the plural 'algae', same for bacterium and bacteria. You owe it to your students to use the proper forms. Really, there is nothing good about promoting ignorance about proper singular and plural formations about words used in scientific jargon. You may not like the dependence on ancient languages - I'm not too keen on it - but it does provide information and makes it sound more like you know what you are talking about.

I work on the line in a factory doing boring stuff all day, and Im running out of content to watch while i work. This was a gem to find because it’s my interest outside of work. Thanks professor.

Building to one of those global anoxic events right now.

this is an excellent presentation, thanks for the lecture!

I know it's 4 years later, but I hope you've cleaned your house lol Great show

Thank you that really helped. Please note that in whatever version of Moodle that I'm using the quiz admin is one page up, on the quiz landing page. This is the page with the number of attempts and the quiz closing date.

It’s dentition , not dentistry isn’t it?

I would posit that the reason for greater and increasing biological diversity after the Permian/Triassic extinction is the evolution of widespread capacity of imprinting behavior. I.e., animal species which can learn simple behaviors from parents, including selectively eating differing foods.

This is a super good lecture. I wanted to learn more about the Silurianan and all there was were clickbaity videos only a few minutes long. Ussally lectures have poor audio quality or are super basic or super complex. This was super helpful.

This is a great lecture for beginners or advanced.

Very good video Interesting, informative, and entertaining. Thanks for posting it.

I wish i could go back and start studying geology @45 .. lol.

Interesting .. i was thinking there should be someone from India on this ... and there is ... hehehe .. nice

Nice series

Looks like sponges became corals✌️❤️🇬🇧

heard of some recent experiments in biology which attempted to induce multicellular life by subjecting some yeast specimens to selective breeding plus induced pressures. Massive breakthrough occured when yeast was subjected to low-oxygen environments, forcing them to form rudimentary circulation, more robust structures, and i think also castes.

I know why there was a diversity plateau at the end Permian, it's because of the uncrossable interior, it limited critters' ability to move to a new environment there by favouring specialization over diversity...the reason we are so diverse now is because critters can migrate to more favourable locals for birthing / feeding. ..IMO

.... so, is the offer of a fossil still valid? 😊💕🍒

Well. I guess it makes me feel better that humans aren't alone in altering our world. Seems that's just a byproduct of life itself. 🤷🏻

excellent presentation!! and no commonplace stammering or meandering....fascinating!!

Ending of video with Lies! Global warming is actually an Ice Age Coming.

Is there anything you can place up that would help explain how animals actually developed the ability to move? Like how did they go from sessile to being able to be mobile?

A great presentation with so much useful information. When you mentioned that there was a significant release of phosphate into the marine environment after one of the early glaciations, it reminded me that (I believe) all eucariotes metabolize ATP (Adenine Tri-Phosphate) to ADP (Adenine Di-Phosphate). Life as it existed probably couldn't get complex and large if there wasn't adequate Phosphate to metabolize.

FYI You make education fun

Thank you it was very good 💯

Thank you so much for sharing this series. I feel lucky to have found this gem among all the youtube/AI dross, just wish I'd happened across it sooner. This is going to be a great way to spend some upcoming winter afternoons.

If oxygenation started after the banded iron layers were formed, how did that iron in the banded iron layers oxidize ? ... also how representative are the deposits containing the Ediacaran fossils for the whole area of the surface of the earth ?

I'm going to guess that the increase in diversity is related to flowering plants. Lots of niches, lots of symbiotic relationships.

While I'm late in commenting, I really enjoyed this video series during COVID lock down.

Commenting for Al Gore's rhythm.

Commenting for Al Gore's rhythm.

I really appreciated your lectures during COVID lock down.

Thanks a lote Amazing

Awesome. Thanks a lot

WORM WARS! Current thinking among scholars is trending towards understanding that there was an Ediacaran Explosion prior to the Cambrian Explosion, but we know the oceanic chemistry necessary to develop calcium-carbonate body parts didn't exist until near the end of the Ediacaran. The more conservative among paleontologists seem to think that there was very little diversity prior to the late Ediacaran, because without shells, teeth, etc, almost no evidence of diversity is left in the geologic record, ergo it didn't exist. NONSENSE, there is evidence of worm tracks in the sea floor of shallow, coastal waters going back almost to the last Slushball/Snowball Earth, and by the end of the Ediacaran, a worm was building layer after layer of thick, cup-like armor rising up out of the coastal biotic mat, which had a large circular hole drilled into it from another worm trying to eat it (Google THAT picture). Things were getting BUSY in that mat, obviously. All PRE-CAMBRIAN. There was clearly intense predatory behaviour going on among worms in the mat long before calcium carbonate allowed a geologic record of it. Eventually genetics might allow us to piece it all together, but until then, CMON, WORM WARS were a thing throughout the Ediacaran, the predation eventually resulting in Molluscs (fat worms with shells), Crustaceans (shelled worms with funky limbs), Vertebrates (fast worms with inner skeletons), etc etc etc. Their earliest, worm ancestors had to have been subject to predation, and when animal life got highly competitive IN the mat, that's when worm variants started getting the hell out of there to live, and only then could they leave fossils. Some levels of the mat clearly lived by dissolving and absorbing the remains of anything that died IN the mat. No record, except ancestors who were just too evolved, too fast. Almost all modern animals are basically worms with a bunch of stuff added on, it's kind of obvious that there had to be incredible diversity and predation among worms throughout the Ediacaran, not just at the very end, for the incredible diversity of late Ediacaran and Cambrian Explosion to be reasonably explained. The diversity of the Cambrian makes a lot more sense if there was "amazing" diversity among the Ediacaran worms who evolved into these Cambrian animals, they just couldn't leave a record of their existence until calcium-carbonate body parts became possible due to oceanic chemistry changes in the late Ediacaran. By then, they were pretty diverse and complex, to the point where they were eating the mat, and earlier above-mat animals, out of existence. Imho😉

In the Mississippi drainage system there's 2 natural barriers, one is on the Mississippi at Minneapolis, water falls, and the other is at Louisville, Kentucky on the Ohio River, called the Falls of the Ohio, it is hard bottom Devonian corral beds which caused cargo to be portaged around until lock technology became used. The corral beds is now protected and can be easily seen.

12:41 Ah, so that’s why Tonian Park wasn’t as successful as the Jurassic one… if only they’d borrowed the strategy of using animals from time periods they weren’t named after 😔

It’s not common to find someone talking about complex life before the Cambrian explosion, but it’s downright rare to find someone talking about pre-ediacaran multicellular life! I wish I could find the class you were talking about at 7:48