What is not really explained well in this video is the fact that simple single celled life seems to have developed almost the moment liquid water was available 3.5 billion years ago. So it would appear the initial creation of basic life was relatively easy. It was the sudden jump to multi-cellular life after 3 billion more years that remains one of the greatest questions of biology.

@ChristianityRecap

Жыл бұрын

Your dates are way off. Have you come to Christ yet, or still think you came from a rock?

@Spicy_Italian_Sausage

Жыл бұрын

@@ChristianityRecap 💀💀🤣🤣

@Spicy_Italian_Sausage

Жыл бұрын

@@ChristianityRecap the fact that you believe anything other than humans being highly evolved primates is astonishing. We are animals... nothing more nothing less.

@samfrazee7022

Жыл бұрын

@@ChristianityRecap bro this is one of the worst attempts at evangelism I’ve ever seen

@ChristianityRecap

Жыл бұрын

@@samfrazee7022 thank you!

never knew an anime would connect me to this prehistoric things

@Zugrwow

3 жыл бұрын

dino bite I know right? I watch ONE video on the weird centipede thing and now my recommendations are full of marine biologist documentaries

@alli3670

3 жыл бұрын

@@Zugrwow LOL SAMEE

@hemblem131

3 жыл бұрын

@@Zugrwow ye the parasite thingy from Shingeki no kyojin

@orangenade3707

3 жыл бұрын

@@hemblem131 hallucigenia

@vimalcurio

2 жыл бұрын

AoT?

The reasons why people are here: - Biologists - Bill Wurtz - Attack on Titan

@drip260

3 жыл бұрын

none of them.

@kda5901

3 жыл бұрын

all of them lol hahaha

@somefuckingretard8289

3 жыл бұрын

I'm here from Bill Wurtz. Never watched Attack on Titan just like I never watched The Matrix because if I ever talk about something considered "deep" I want people to know things I say come from experience and the mind, not from a movie I was inspired by and decided I'd become a wanna-be

@mikepencestoes

3 жыл бұрын

I have an ocean obsession 🧍🏻

@zackakai5173

3 жыл бұрын

- Yes - Big yes - I don't know, I only watched the first season back when it came out and I was never interested enough to watch more xD

Unlike facebook which is utter crap, youtube may be the most useful site on the internet. Wanted to be a paleontologist as a kid, career path went elsewhere but maintained my fascination for the subject. youtube has vast amounts of material on the topic and allows the intested layman access to materials thay may have long been forgotten. Well done,,,,Oh and interesting summation. Amazing how well we have progressed in our understanding of the beginnigns of life.

@MrKmanthie

6 жыл бұрын

I completely agree with you - Facebook is really stupid. It's a real waste of time. just an excuse to stay inside and never interact with people, "IRL". You Tube, on the other hand - as long as you stay away from (most of_ the comments, one can find an amazing amount of programs, videos, movies, and all sorts of unpredictable things which people from around the world have uploaded- everything from silly cats-trying-to-walk-on-treadmills videos to videotaped college course lectures from such institutions as Stanford, MIT, (grudgingly I'll say it:) Yale (although, of course, Harvard is so much better than Yale, but that's a different argument for another time). Anyway, if you want to find educational videos about all sorts of subjects - weather/climate sciences, astrophysics, quantum physics, anthropology, etc., etc. and, of course, there are millions of songs that are uploaded either as just a still picture-video with the song playing or else the video for the song is uploaded or even, sometimes, some uploader will create their own video for a particular song and post it, and sometimes you find whole albums' worth of stuff, i.e., a whole album in one post. Also, there are also lots of movies - both public domain ones, like so many great things from the early 30s (and a lot of these early 30s movies are actually better than the stuff that came out of Hollywood after that awful "Hays Code" -that asshole who, being an uptight stick-up-the-ass jerk & trying to kiss the govt's ass so they wouldn't clamp down & legislate Victorian morals on films-which happened anyway, up until the 60s, when taboos were finally being chopped down & flushed down the goddamn toilet! But you can sometimes catch a newer (copyrighted) movie that has either escaped the copyright-policing software that takes those down by speeding up the sound or doing some sort of tricky thing with the picture quality - sometimes it's in the form of an elliptical light in the middle of the movie that can be distracting when the scene happens to be in a dark spot - say, at night or in a darkened room, etc. Or, you may get a chance to see a newer movie if you chance upon it just in time, before it gets taken down for copyright reasons. Anyway, yes, You Tube is a great thing - I only wish all the trolls that waste so much time with their back & forth verbal catfights and temper tantrums, etc. would go somewhere else - like Facebook and stay there! -otherwise, just stay up where the video is & ignore the comments and you'll enjoy the experience much more!

@MrKmanthie

6 жыл бұрын

Yeah, FUCK facebook. Bunch of idiots.

@shirleymason7697

6 жыл бұрын

I tried FB briefly and quickly knew it was a huge waste of my valuable time. Time is something of which they won’t be making more. I took a look at some of the connections to my FB, and, YEESH ! many people had posted every bit of trivia as though - if they couldn’t record each meal, each trip, each day, each breath, it hadn’t existed, and they might not exist. Perhaps they do not exist, if FB takes up so much of their concentration.

@stackflow343

6 жыл бұрын

KZread is a mess actually.

@stevemoyer2273

6 жыл бұрын

Try TED talks. Even better

Aot chap 137 be like:

Shingeki no kyojin

@erenjaeger1738

3 жыл бұрын

shhh

this is the kind of videos i subscribed for

@Mrbfgray

6 жыл бұрын

Indeed. And one of the most fascinating topics ever.

@robwells5753

4 жыл бұрын

i didnt sub but im happy you did , )

Attack on Titan refrencess

Absolutely well done and definitely keep it up!!! 👍👍👍👍👍

Literally, AOT bring everyone to learn biology

@SimbolicProductions

2 жыл бұрын

AOC*

@agnostic_man6943

2 жыл бұрын

Attack on Titan?

@vimalcurio

2 жыл бұрын

For me it was a Jeff Bezos video lol but I've also watched that episode on AOT but didn't go that deep there

Nobody expects the Cambrian Explosion!

@keepdancingmaria

6 жыл бұрын

Now, THAT was unexpected!!!!!

@williamchamberlain2263

5 жыл бұрын

Would've made Monty Python a lot harder to shoot.

@cjb4924

5 жыл бұрын

I just made this comment elsewhere in these comments, but now see you beat me to it. First kudos to you.

@larryquirap5154

5 жыл бұрын

There is an intervention

@robertbrodie5183

5 жыл бұрын

It chief weapon is shells and mobility. Our two chief weapons are shells,mobility and a ruthless devotion to evolution. Its three, three chief

The Economist: What caused the Cambrian explosion? Me: Wait, what? The economist is looking at paleontology? What?

they talk about eyes, oxygen but no sexual organ explosions ?

Ok, we have no idea how the Cambrian explosion occurred.

@chimpanzeethat3802

4 жыл бұрын

Evolution.

@yahwayapps7947

4 жыл бұрын

May be all animals created at the same time instead of evolutionary process?

@chimpanzeethat3802

4 жыл бұрын

No of course not. There are pre-Cambrian fossil ancestors for organisms in the Cambrian. Not many of them admittedly because soft bodied organisms are hard to find in the fossil record. Evolution is already proven to exist.

@grinckerthesoul1510

4 жыл бұрын

@@chimpanzeethat3802 Yes, simply a mixture of random genetic modifications

@SonofJacob120

4 жыл бұрын

@@chimpanzeethat3802 explain to me the evolution of the human eye.

This is so great. I love videos like this.

Very informative thank you :)

Consider that the Cambrian Explosion was pretty much about the arthropods which happened because of their new found ability to produce chitin. For the mollusks it was the Ordovician (and their ability to produce a calcium carbonate shell). For the Chordates it was the Silurian (and their ability to produce a calcium phosphate skeleton). It was all about the ability lay down skeletal material and HGT (horizontal gene transfer) was almost certainly the mechanism that spread the capability among related taxa.

@mikerogers4640

4 жыл бұрын

Agreed. Former soft animals simply died and got eaten or vice versa. The one change of adding hard matter such as shells or skeletons created fossils. Just one small change and all is explained. No great time involved.

@wombatmobile

Жыл бұрын

What do you mean by "soft animals"? How many cells were they composed of? Were they eukaryotes? What caused the evolution of soft animals? How did life go from single cells to multiple celled organisms?

@midas01tw

Жыл бұрын

@@wombatmobile the ancestors of the cambrian fossils, no skeleton or shell, no fossils, but they were somewhat more like animals than simple multicelular life

@wombatmobile

Жыл бұрын

@@midas01tw Were they eukaryotes? How did life go from single cells to multiple celled organisms?

@fishwoman7825

Жыл бұрын

@@wombatmobile Best off asking a biologist those questions mate. I doubt random youtube commenters will be able to answer your questions with accuracy and explanation, you will just end up doubting the answers and forming your own incorrect ones

It's the cambrian explosion! "Wow, that's animals and stuff"

@lucasmartin9511

5 жыл бұрын

You forgot the TM at the end of the word stuff

@danifields6805

3 жыл бұрын

Can we go on land now? "NO" Why? "THE SUN IS A DEADLY LAZER" Oh ok. "Not anymore. There's a blanket"

WOW that was a very well done video! 👍

Great vid

thank you been pondering this mystery all day and all night and i a m tired of all the conspiracy theories about it . this was succinct and based on science.

@mohammedhasanen6291

2 жыл бұрын

what science ?? the whole video is just showing theories with no single scientific evidence.... watch it again .. every scientist is just giving his own opinion !!

@joshmarsh2532

Жыл бұрын

@@mohammedhasanen6291 Looks like someone didn't learn the difference between theory and hypothesis in school. Gravity is a theory, don't see you claiming it's not real

@mohammedhasanen6291

Жыл бұрын

@@joshmarsh2532 … Wow, Please teach me your wisdom and tell me the difference. I think if you were living 500 years ago, you would be easily convinced that the moon was being swallowed by a dragon during eclipses, because the wise man in the village said so 😂. Hypothesis or a theory 🤔, if it’s a hypothesis, then you cannot call it science because no one sure if it’s true or not .. if it’s a theory then it needs to be consistent with the data AND LOGICAL. A dragon swallowing the moon during eclipse is consistent with the data ( the mood suddenly disappears) but not LOGICAL. Having this variety of creatures in such a short period of time with this scale because the oxygen level become higher is simply not logical to me.

most of the basic body forms (plus some we have since lost) appeared out of nowhere for no known reason in a little bit more than the time taken for us to diversify from our chimp ancestor - amazing! All those; complex organs, feedback loops in physiology, nervous systems etc - utterly and literally fantastic.

@busylivingnotdying

2 жыл бұрын

Well, if I understand it correctly, what emerged "suddenly", was life that FOSSILIZED well enough to be classified. We know too little about the creatures before the Cambrian to contrast it (with certainty) with what came after. Some say the Cambrian explosion started well BEFORE the Cambrian .. extending it to maybe 50 million years (if I remember correctly)

thanks for the vid :-)

Great thanks For this ConTENT

I have noticed many trilobites are found in the folded posture. It seems it was a defensive posture to protect its softer under body. I have ten trilobites. Six of them are in the defensive folded posture.

Now we know the Ediacarans lived alongside the Cambrians, and Anomalocaridids survived until during the Devonian

@christianv-h3278

5 жыл бұрын

I hope we soon manage to fill the Silurian gap in the anomalocaridid record...

Excellent, thanks,

Fabulous Edification

Competition really drives innovation.

@EGarrett01

8 жыл бұрын

+joshuaoha Send this video to Bernie Sanders please.

@bakalitetrick968

8 жыл бұрын

+joshuaoha competition between species, you knuckleheads.

@EGarrett01

8 жыл бұрын

m. buss ...and within species, and in economics.

@bakalitetrick968

8 жыл бұрын

+The Blind Nigga Samurai ... its just that, really, this video is about a different type of competition and a different type of evolution.

@spensermitchell4106

8 жыл бұрын

+Wissenschaftlich Bewiesen try being a little less pompous and people will respect your intelligence. Especially if you respect their beliefs.

Explosion occur because someone turn into Titan.

great content 😎

Do they have more videos about history? Mindblowing ö

I just cannot get enough of this evolution stuff, it’s amazing, wonderful and magical ...

@chopppacalamari

Жыл бұрын

Yes it is magic alright.

Aot fans anyone?

Had been watching the Beirut explosion, so when I clicked on this, the expectation that this video might mention a physical chain reaction explosion involving explosive products, thinking acme tnt that the road runner used, were pretty high. I have learnt something new and covered history for the day.

I love the animation!

Cambrian period is so cool life-form

I wonder if the water back then was freshwater, brackish or saltwater. It could be that different concentrations of minerals and chemicals affected the creatures and it didn't matter since they have adopted to their environment. The shape of a creature is affected by how they move and how their mate and their opponents react (social interactions). A predator will eat their prey regardless of shells and spikes. The shells, spikes and other limbs affect how the creature expresses their aggression towards a rival and many other methods of communication towards their mate. The size and the other augmented body parts are due to their way of obtaining food and how they move about. Most of the creatures featured in the video resemble many microscopic creatures and vernal pond creatures of today.

@essex3777

Жыл бұрын

I always wondered if a human went back to that time, would he be able to survive? Would the atmosphere be breathable? Is the land hostiles? Where can he find food?

@archravenineteenseventeen

Жыл бұрын

​@@essex3777 nope. We have smaller lungs and can't handle vast amount of oxygen

good vid. few docs on cambrian explosion and even less on the ediacren.

Excellent

Wow, that's animals and stuff.

@bobyfransr

7 жыл бұрын

bill wurtz

@itskevinjustkevin

5 жыл бұрын

But we're still in the ocean hey can we go on land?

@Jessica-xh7lt

5 жыл бұрын

Thank you for explaining I was so lost

@kunnoqi6054

5 жыл бұрын

why? *THE SUN IS A DEADLY LAZER*

@corruptedholiness8995

5 жыл бұрын

@@kunnoqi6054 not anymore theres a blanket

I've always viewed the cambrian explosion as an event wherein you have a vast habitat of plant life with no predation. Once levels of oxygen became enough to support sustained movement, the arms race began. But keep in mind, that virtually EVERY predatory mutation during this time was likely successful (or at least a large portion were compared to later where predatory niches are filled and competition fierce)

@TrinityCore60

Жыл бұрын

Wait, that only happened in the Precambrian? I didn’t realized that took so long.

@_vallee_5190

Жыл бұрын

Oxygen levels were higher prior to the Cambrian explosion so this doesn't make any sense. In face snowball earth was caused by Cyanobacteria removing carbon from the atmosphere, which occurred long before the Cambrian.

I'm glad they talk about the Avalon Period in the Ediacaran Period.

Very interesting! There is some questions in earth history without the answer. But remarkably, the Economist is trying to find the answer. But of course, I have no question about. WELL DONE!

@hossameldeeb8686

8 жыл бұрын

do you think the Cambrian explosion pose challenge to evoultion ?

@rejmons1

8 жыл бұрын

Maybe... Of course I'm not sure. Nobody could be sure about. And I'm the kind of "detective" as Mulder from "The X Files". I love to try to find the answer on the questions on which, truly speaking, have no answer. I know, I'm the freak... What can I say? So, this time challenge to evolution! As I suppose. Because it were nothing, and suddenly - BANG! A lot of form of life. Very distressing,,,

@hossameldeeb8686

8 жыл бұрын

+Tomasz Wójcik why distressing

@rejmons1

8 жыл бұрын

+Hossam Eldeeb Why? Because the modern science like every religion have got the "fundamental" and "immutable" truths: And one of "most fundamental" is the evolution. Life was born in long chemistry process. And then it have been evolved from primitive bacteria to complex organisms. This process was slow and continuous. And, there is the lack of continuity. And science can not find the answer. One of most fundamental pillar of faith of science is shaking itself... PS: I'm the Christian (Roman Catholic) in Medieval style: The Religion is the fundamental for me. I do not believe in God, but I believe to God! And the modern science is against the religion. So, I do not care about this trouble of science!

@hossameldeeb8686

8 жыл бұрын

+Tomasz Wójcik science not aganist all religion but you believe in god now ?

"Life literally exploded" _Andrew Parker_ I don't think proffessor Parker knows what the word "literally" means.

@ducksmugglers

5 жыл бұрын

Or exploded

@matbroomfield

5 жыл бұрын

@@ducksmugglers lol

@thomassaldana2465

5 жыл бұрын

kzread.info/dash/bejne/ho520Jpmhbi3law.html

@CharlesvanDijk-ir6bl

5 жыл бұрын

The "explosion" took 25 million years.

@vashon100

5 жыл бұрын

Professor

Stop spoiling Attack on titan with these videos

You should provide sources in the description like links to papers and reviews

It's one of the most extraordinary events in the earth's history where the sea animals of major phyla appeared all of a sudden, the recent fossil find in China, the Qingjiang biota is yet another vivid illustration of this event that occurred 518 million years ago globally.

Yeagerbomb

Aot

Good presentation. I felt the animated life forms were fanciful but not being an expert I can only compare some of the forms and the fossil record in texts and collections. Very stimulating.

you know, if I turn the sound right the way to the top it almost sounds like there are people talking.

They have no idea what CAUSED the Cambrian explosion.

@generalleenknassknotretire9180

5 жыл бұрын

Humans don't know a lot of things. What's your point?

@ZGGuesswho

5 жыл бұрын

but they know much, and it is proven through various causal mechanisms that are trackable through re-provable feedback mechanisms that happen through constants, like chemical action. It's an insane amount of state history for extractable data, because it's stratified, or because it is retained in genetics. That's huge amounts of backing data. I don't even know why I'm saying it to you "Robert" because you're not gonna care and it's probably better that you don't. We're fucked.

@ducksmugglers

5 жыл бұрын

Was semtex a thing back then?

YAY! A documentary that wasnt uploaded by a 1993 camcorder bootleg!!

MORE VOLUME!!!

Ashley Bryant GOL 106 V1. I learned that there is much debate as to what exactly caused the Cambrian explosion with hypothesis ranging from an explosion of oxygen levels just prior to the Cambrian to a potential mass extinction prior to the Cambrian making it appear that new sorts of creatures rapidly evolved when, in fact, they had been around beforehand and just now had new ecological niches that they could fill.

Thank you Cambrian explosion, I am enjoying existing as a human being ! :-) It would be nice if you could repeat that, and create thousands of new species to keep Earth Alive.

I'm almost 30 & I chuckled when the narrator said anus .... * sigh *

@brianhackert8513

6 жыл бұрын

the church people blushed and felt ashamed

@juggalo184

6 жыл бұрын

Grow up. We don't need naughty language to entertain us.

@shirleymason7697

6 жыл бұрын

Anus is an appropriate anatomical term, just like saying face, foot, knee, - go to school.

@shirleymason7697

6 жыл бұрын

Exactly what would you almost-thirty have had him say? That aperture at one end for elimination? Almost-thirty sounds almost-ten.

@LadyJ_88

6 жыл бұрын

Shirley Mason I make no excuses for what my idiotic baby brain finds funny. Lighten up Shirley

13--25 million years is sort of a 'slow motion' explosion. We often forget evolution is agonizingly long!

sound is quite low

Where is the Link between cambrian explosiojn or any life, and the hard problem of conciousness?

@Peter_Scheen

5 жыл бұрын

Why? You refer to Abiogenesis, something that happened billions of years before that period and something as consciousness that happened millions of years later. In either case they have some compelling evidence.

@RifetOkic

5 жыл бұрын

Isn’t that the materialistic/chemical explanation ? I mean basically, how , why and when does an hydrogen atom start to have an inner experience ? I mean bacteria have maybe a billionth of a billionth of the conciousness we have, nothing as rich as we do, maybe the faintest sense of light or pressure. I mean also: this complex brain activity, or any sensory experience, why is there an subjective aspect? Why is it not all happening in the dark without us having an experience ? I mean, the matter itself is unconcious, how can it ever give rise to something as immaterial as an experience ? I’m searching for some answers. But this video is definitely interesting and all gathered knowledge is welcome.

@Peter_Scheen

5 жыл бұрын

@@RifetOkic The total is more than the sum of its components. The brain is a collection of neurons that is so complex that it now creates the consciousness. Look at chimps, they too are aware of their existence. They too feel compassion for other chimps. So, even though it is mind boggling it is the result of biochemistry. For instance, you do know that people with brain damage can loose parts of their cognition. They often can not speak or understand what you say, they can loose their empathy for others etc. It is a wonderful thing that we are at this stage of evolution, I wonder what the far future will bring.

Tough to study. Lack of fossilization due to hard bodies make this really tough lots of holes scientists haven’t figured out yet

@mtlicq

4 жыл бұрын

LOL

Excellent presentation. But what about the Eucariotic cell? And Mitochondria? Wasn't THAT the trigger?

@brandons.

2 жыл бұрын

No, it can't be that. The Eucariotic cell and the Mitochondria helped create MULTI-CELLULAR LIFEFORMS. The Cambrian Explosion was about the development of hard-bodied creatures and animals that could move on their own. Vision was created and you could fully be aware of your surroundings. Multi-cellur lifeforms appeared before the Cambrian Explosion. They were Ediacaran creatures. What you are describing was the trigger for multi-cellular lifeforms, NOT the Cambrian Explosion.

At around 8 minutes this post talks about relationships between marine predators and their prey, and states that it has been possible to examine the stomach contents of a sea dwelling life form from 64 million years ago. Please could you explain how this data (the nature of the stomach contents) was obtained and is it available to public viewing

I think a considerable factor in the cause of the explosion of life at the time of the Cambrian Era, is that the earth's temperature at the time is the warmest it has been since that time. Warmer than the Eocene Optimum. There is always more growth and variety in warmer times.

Answer: The Kree

When do Tunicates (early chordates) show up?

Sounds like it could be something of a "snowball" effect. Once the basic foundations are in place for competitive evolution it accelerates from there. Maybe an extinction event at the end of the Ediacaran gave enough opportunity for certain forms of animal to emerge and seed the Cambrian explosion, or one or more evolutionary innovations allowed an animal to gain a sudden upper-hand and displace the other Ediacaran biota very quickly.

Greetings all. The Cambrian explosion occurred in the eukaryotic cell based organisms, and they completely outclassed their competition (making animals, plants, fungi) leading to an evolutionary explosion. This superiority is especially visible in multi-cellular forms. This is really a story about eukaryotes “flexing their muscles” after a couple of billion years of perfecting their reproductive and maintenance control mechanisms. The most important aspect of the eukaryotes is a cell nucleus that functions like a computing system with hardware (DNA memory system, memory system operations like reading/writing/error correction, etc.) and software (the genome). The eukaryotes had built a cellular computer sufficiently powerful to reliably construct and maintain the complexity of a multi-cellular form. Thanks for listening.

@CalvinDilbert

7 жыл бұрын

Thank you! Glad to be an eukaryote.

@JohnStephenWeck

7 жыл бұрын

;)

@gunnaropsahl5209

7 жыл бұрын

Interesting! I would still like to question the claim that "(...)eukaryotes had built a cellular computer system(...)". Does anyone actually know how the information-rich molecules and the cell's information-processing system in the DNA/RNA arose?

@JohnStephenWeck

7 жыл бұрын

greetings gunnar, I don't know anything about the origins of cellular computers. But I do know that wherever software systems exist in a control system, it provides the intelligence of that system. The bigger the software, the more intelligent the system. In this case, the nucleus "computer" is manufacturing a multi-cellular organism (with high level structures like organs, tissues, etc), not merely a pool of cells, like the Stromatolites (which takes little information beyond just cells to construct and maintain). In order to construct the more complex organisms, there had to be an evolution of software-size (indirectly the DNA memory system size) so that it would be big enough to solve this problem. This includes any error correction required to maintain the larger memory.

@MasterChief-sl9ro

7 жыл бұрын

That is nice. But time is not a physical force. You need something to spur it. And you don't have Billions of years. You got maybe 20 million. As the conditions on earth for the first 3.5 billion was recovering from the formation of the moon and thick atmosphere to be stropped away. Then just at the proper conditions exist. It all just comes alive at around 600 million years ago. Mot to mention. Once you have water in all three states. You have Oxidation. Corrosion. Chlorine and Radiation. All of which would stop any cellular life from forming new features. As you get crippling mutations. That degrade the genetic information. And yes. I know my biology. As we got better microscopes today....

The answer to that question is : THE EDIACARIAN EXPLOSION did trigger the cambrian explosion.

Fascinating! Well done video.

This Much Quality Of a Video 7 Years Old Is Not Normal

shhh my weebs this is history class

First they said, Cambrian explosion was a mystery, then said, what happened Exactly!

@Cyberpuppy63

2 жыл бұрын

It's a mystery due to a lack of "hard", easy to find evidence. a) due to most fossils not having hard parts; and b) convective and geo-morphic removal of rock and land masses due to subduction.

@scottdetter

2 жыл бұрын

@@Cyberpuppy63 there should be 1000’s more transitional fossils than there are actual fossils. I’m all for “theories” & “hypothesis” and even the word that science can’t live without namely “Chance” but the real insidious word that is always thrown around with abandon in the scientific world (and the political world for that matter) is the word “Fact”. We can’t have our cake & eat it too.

"Then, in the late Devouring period, fish became obnoxious"

Uclid Sylvestre Spring 2020 GOL 106 V1: It is interesting that many approximate dates are mentioned but then statements are made about the lack of evidence to support the given theory. This just seems to confuse more than elaborate on the history of Earth and life.

@ozowen5961

4 жыл бұрын

Or they could pretend to a certainty they don't have. The degree of certainty is perhaps the element you are missing here?

Thumbnail of my mother-in-law.

Aot....

There is no known mechanism that could lead to the Cambrian explosion. Successful lifeforms would have no need to change so drastically. In fact their dna would prevent these changes to body forms and the manifestation of new organs and appendages.

The squid-like creatures were so cute!

ITS A CAMBRIAN EXPLOSION!!!!!!!!!!!!🎵🎵

@mtlicq

4 жыл бұрын

Rock on !

🎼it's the Cambrian explosion🎼

@JeremiahKlarman

3 жыл бұрын

Wow, that’s animals and stuff.

I say that the embryonic larvae of many of the Ediacaran animals were planktotrophic and many similar to medusae. It could be that the fossils of the Ediacaran were adults and during the Cambrian they kept the larvae form through adulthood and lost the sessile adult stage(heterochrony).During growth of the retained larval stages many mechanical strains and stresses would deform cells, tissues, and body cavities as well effect gene activity. This would imply that plasticity and epigenetics were major variational drivers of the Cambrian diversification. Also the physical and evolutionary constraints that penalize developmental-morphological change in later periods were only being first established and consolidated at that time, later becoming evolutionarily and historically locked-in and pleiotropic.That led to the development and elaboration of developmental gene regulatory networks and/or character identity networks. This was achieved through genetic assimilation of plastic developmental reaction norms. Evolutionary ontogenesis can occur through tumor neofunctionalization, initially being benign or a functionless structural spandrel, then subsequently being exaptated. Selection was only a filter of better design and function. The mutation rates between and within species would have fluctuated much greater then than today. Levels of genetic divergence were low then, even between what we would define as different phyla. As such all phyla would share more than 90% of their DNA sequences and genes with each other. Here the possibility of Hybridization between members of two phyla were very real with little Dobzhansky-muller incompatibilities to prevent it. The most important DNA sequence mutations would have been cis-regulatory, non-coding, retrotransposons, transposons, regulatory RNA's etc. Also behavioral plasticity, niche construction or constructional selection, and eco-evolutionary feedback dynamics were major processes as well. During adaptive radiations selective and ecological constraints are nearly zero, as populations occupy and even create new environments and niches, making hopeful monsters far more common. The behavioral activities of populations can relax, strengthen, weaken, and create selective pressures. So this, and all the video says, such as increased oxygen levels, macro-predation, complex eyes and so on is your answer!!!!!!!!!!!!!!!!!!!!!!!!

These creatures/things creep me out

I believe that predation is the cause of accelerated evolution. Precambrian life would have included predatory life, albeit unconcious predation. For example, the absortion of other organisms. The absorbed species would evolve ways to defend against this, leading to hard bodies being formed. This would lead the predatory organisms to evolve ways to break those defences. Jaws for example. The whole of evolution has been an arms race.

@cabudagavin3896

2 жыл бұрын

probably because there are many different viable responses to predation, as well as many different responses to those defence mechanisms, maybe the increased oxygen specified in the video increased the top size of mass accumulation thus increasing predation and allowing for more trophic levels in between apex and producer,

@cabudagavin3896

2 жыл бұрын

i.e. morphology became the new meta.

Explanation: nature was high for 2 billion years

Its the Cambrian explosion!

maybe cambrian explolson is directly connected with development of neurons, which give rise of eyes, brain, nervous system.

I thought the economists are only interested in economics.🤔

@adamplentl5588

3 жыл бұрын

I guess life is a big part of economics.

@cheeseycheezy

3 жыл бұрын

I mean, without the start of life there is no economists- ;-;

@LionKing-ew9rm

3 жыл бұрын

@@adamplentl5588 I think economy, is an extension of biology (into the humanities)

Wow that's animals & stuff

@cheeseycheezy

3 жыл бұрын

But we still in the ocean, hey can we go on land? No Why? THE SUN IS A DEADLY LAZER

how did they reproduce tho i kinda need to find out for my school project

Heat is also a factor, after long, gigantic ice ages, the warming of the oceans made masses of life possible...

What about bioturbation caused by early worms? It could explain both the sudden disappearance of the Ediacaran fauna (because their niches based on microbial mats disappeared) and an increased abundance of nutrients, oxygenation of the soils and new niches needed for the Cambrian explosion. Besides, it fits the fossil data...

@Peter_Scheen

7 жыл бұрын

Yes most probably there are more than one factors causing this, but for the sake of a relatively short video these are left out.

@johntillman6068

7 жыл бұрын

The Ediacaran fauna largely fed on microbial mats. Their extinction is connected with the disappearance of these seafloor mats.

I think the cause is something called *EREN JAEGAR*

I did. I don't want to divulge too much, but it involves eating A LOT of sauerkraut ...

Really wish half of the prehistoric life survived or brought back to life right now like the trilobite and the annomite

Mind boggling and awesome do not begin to give this topic justice.

@TaoMing

6 жыл бұрын

Seeking the truth as it relates to conscious life? Search *_Truth Contest_* and read the top entry called "The Present".

@tgreg9542

5 жыл бұрын

Matthew Chua well back in theses times I’m pretty sure sure animals were laying eggs and the male would fertilize them......not humping was done YET

Could the explosion have been caused by fluctuations in the Earth's magnetic field causing excess radiation from the Sun reaching the surface and causing many mutations in the lifeforms resulting in such developments? If this is a possibility there would have been multiple changes, many successful and able to flourish, whilst other's were too bizarre and impossible to cope with the existing conditions, therefore fading into oblivion.

@Bravetrain13

2 жыл бұрын

I'm sorry but do you know the mathematical odds of that being the answer? We throw out all these possibilities that have extremely absurd mathematical odds and hardly make any sense in light of what we now know about DNA. I'll never understand why we are forcing ourselves to ignore hypotheses with better odds in order to jam hypotheses with absurd odds into the current framework because they fit the dominant ideology.

@heythere9554

Жыл бұрын

We could try to recreate similar situation in a lab to confirm or reject this theory

@SomeCollege

Жыл бұрын

No, mutations could not have caused the development of any complex life forms we observe in the Cambrian explosion or life we observe today, including you. It’s mathematically impossible.

@Magst3r1

Жыл бұрын

@@SomeCollege Why not?

@chopppacalamari

Жыл бұрын

@@Bravetrain13 the more likely scenario mathematically is that all the fossils in the Cambrian explosion were already living since day one and the explosion is due to the first ever flood occurring and burying them.

Co2 levels were 7000 ppm or 20 times what they are today. High co2 levels always cause a proliferation of life, and no ocean acidification.

Right near the end,The Narrater mentions that it could be the recovery from a mass extinction. There was one back about then, Everything not covered by 15 feet of water died, so it was thought to be a Gamma Ray burst ,there is even a search for the leftover sun,,