The First Animal Ever on Earth

Подписаться 8 млн

Просмотров 412 тыс.

50% 1

Do you ever wonder what the first animal on earth looked like? What did they do? How did they live? Join Stefan Chin for a fun new episode of SciShow that takes you way, way back.
SciShow has a spinoff podcast! It's called SciShow Tangents. Check it out at www.scishowtangents.org
----------
Support SciShow by becoming a patron on Patreon: / scishow
----------
Huge thanks go to the following Patreon supporters for helping us keep SciShow free for everyone forever:
Bill & Katie Scholl, Adam Brainard, Greg, Alex Hackman, Andrew Finley Brenan, Sam Lutfi, D.A. Noe, الخليفي سلطان, Piya Shedden, KatieMarie Magnone, Scott Satovsky Jr, Charles Southerland, Patrick D. Ashmore, charles george, Kevin Bealer, Chris Peters
----------
Looking for SciShow elsewhere on the internet?
Facebook: / scishow
Twitter: / scishow
Tumblr: / scishow
Instagram: / thescishow
----------
Sources:
evolution.berkeley.edu/evolib...
www.nature.com/scitable/topic...
cnx.org/contents/24nI-KJ8@24....
www.ncbi.nlm.nih.gov/pubmed/2...
www.quantamagazine.org/comb-j...
www.nature.com/articles/s4155...
www.cell.com/trends/ecology-e...
courses.lumenlearning.com/wm-...
education.seattlepi.com/princ...
ocean.si.edu/ocean-life/inver...
www.ncbi.nlm.nih.gov/pubmed/1...
www.qm.qld.gov.au/Find+out+abo...
www.ucmp.berkeley.edu/cnidaria...
news.nationalgeographic.com/2...
www.sciencedirect.com/science...
advances.sciencemag.org/conten...
www.ncbi.nlm.nih.gov/pubmed/2...
academic.oup.com/bfg/article/...
www.ncbi.nlm.nih.gov/pubmed/2...
www.ncbi.nlm.nih.gov/pmc/arti...

Опубликовано:

5 мар 2019

Ссылка:

Скачать:

Готовим ссылку...

Добавить в:

Мой плейлист

Посмотреть позже

Комментарии : 900

@asmillingchihuahua9858 5 лет назад

Guy: Who lives in a pineapple under the sea? Other guy: Our ancestors?

@addi1434 4 года назад

NotFlatEarthing nO SoNge bOB

@eertikrux666 3 года назад

The old ones

@culwin 5 лет назад

Have to ask TierZoo. I think he has a .rom of the unreleased prototype.

@PartyDude_19 5 лет назад

Good one

@manictiger 4 года назад

Proof the devs have a sense of humor: First animal is called dickinsonia.

@user-yg6ki7ou2y 3 года назад

@@manictiger lmao

@bounce9568 2 года назад

@@manictiger foreshadowing

@austingonzalez1148 5 лет назад

Excellent video conclusion. It's not the result that matters, but the process and curiosity. Nice.

@gre3nishsinx0Rgold4 5 лет назад

I wonder how heated the fight between the scientists are.. is it just a hot debate, or is it two scientists drawing ruler like swords and battling it out..

@christelheadington1136 5 лет назад

MY PAPER can beat YOUR PAPER!!

@dynamicworlds1 5 лет назад

It's a hot debate, but with the future advancement of careers on the line if one side can prove they're right. It's not a fight with rulers (or else scientists would favor imperial more as yardsticks beat out meter sticks) but more like the "fight" in a chess match with a big prize/pot going to the winner.

@steelman1506 5 лет назад

@NorthObsidianG What a stupid question. I give your question the lowest grade possible in Science; an A minus

@soriac2357 5 лет назад

You know scientists, discussions over each others paper can get reeeealy heated. It goes right to the STUDY DOME! TWO ENTER! ONE LEAVES! :-)

@rescuerex7031 5 лет назад

Scientific Gladitorial combat would be pretty lit

@alexlandherr 5 лет назад

Somehow “Team Sponge” and “Team Comb Jelly” is way better than than the teams in Twilight...

@wmdkitty 5 лет назад

I was "Team Dump Him And Run Like Hell"

@PartyDude_19 5 лет назад

Yes

@neuswoesje590 2 года назад

@@wmdkitty if anything I was team Alice but that was before I found out Jasper was a proud confederacy soldier and Alice knew before they even met so... Team get therapy and a personality?

@hilarylutz693 Год назад

@@neuswoesje590 hear ye hear ye

@mikemorr100 5 лет назад

I would imagine it'd look jellyfish like. I mean, the Man O War isn't actually an animal itself but a bundle of different organisms in a huge symbiotic relationship. So I'd imagine the first animal would be a bundle of different bacteria that joined together into a single organism, becoming an animal in the process.

@sdfkjgh 5 лет назад

I'd point out that there's already a model organism for this, but my _Volvox_ is still in the shop.

@ShadowFoxSF 5 лет назад

To a degree, maybe that's how a lot of organelles started out too. Mitochondria have their own DNA separate from the rest of a person or animals cells. Maybe it was at one time it's own thing.

@skyem5250 5 лет назад

Some scientists think this is how animals first came to be, but it was not different bacteria, but genetically identical colonies of choanoflagellates.

@DarkMage501 5 лет назад

ShadowFoxSF that’s not a maybe. Mitochondria and cells created a symbiotic relationship a long time ago

@ELbabotas1 4 года назад

Dictyostelid

@RatzBuddie 5 лет назад

1: Maybe sponges lost their neural structure because they're immobile or comb jellies gained one for movement? 2: Are the neuropeptides too simple for something more complex than comb jellies?

@simplethings3730 5 лет назад

I get along just fine using neuropeptides. Unfortunately, in my case, that doesn't answer your question.

@JohnJohansen2 5 лет назад

Now eating my distant relative, the apple.

@dmanzawsome 3 года назад

You filthy cannibal!

@johannageisel5390 3 года назад

Eukaroyte on eukaryote violence is a worldwide problem!

@bingolingo6555 3 года назад

Apples aren't alive tho

@johannageisel5390 3 года назад

@@bingolingo6555 Wat?

@thelordnaevis4946 2 года назад

@@bingolingo6555 they are, or else they wouldn’t be called life

@skiiman534 5 лет назад

The first animal was Mew

@fooguwu 5 лет назад

But trucks have only existed for 100 years. Myth busted

@bluefireblood666 5 лет назад

No, it's clearly Arceus

@TheDragonfriday 5 лет назад

no it’s the egg

@Im-Not-a-Dog 5 лет назад

No, it’s Patrick.

@tj4234 5 лет назад

Actually Dialga

@jayasuryangoral-maanyan3901 5 лет назад

I really don't see the issue with the nervous system forming twice in animals. The venus fly trap has sodium-potassium channels that allow it to react (I'm pretty sure), and we use those channels in our nervous system. On the other hand bivalves have evolved from animals that had a much more intricate nervous system and barely have any now. I would want to think that sponges and cnitifores shared a common ancestor that had something like the start of a nervous system without synapses (so no acetylcholine etc) and that sponges lost the nervous system. The only issue is that the loose working together of different cells make it so nice to think that early on it was the way that sponges worked that started the animals off.

@christelheadington1136 5 лет назад

Nice to know someone elses mind wandered down the same path as mine.

@dynamicworlds1 5 лет назад

Yeah, the nervous system can start by an organism dumping signaling chemicals in between the layers of cells, and then just evolve faster methods of transmitting those signals with relay cells which would eventually become neurons with synapses. That seems a _lot_ more likely than developing a nervous system and then completely changing the chemicals used in what, by then, would already be becoming a intricate system. It seems about as likely to evolve multiple times as eyes. I can only think to approach this from thinking of how would a bacterial colony start to specialize into having different cell types, and basic things like chemical signaling and shapes close to jellies are already really common there. For example news.berkeley.edu/2012/10/24/did-bacteria-spark-evolution-of-multicellular-life/ already looks like the ancestor of a jelly, and wouldn't take many changes to really become one (not even a nervous system of any complexity) I don't see why mobility is a point against jellies when mobility seems to be older than multicellular life.

@nataliagonzalez1698 5 лет назад

Id like to think that there’s only so many ways of doing something effectively.

@asaenvolk 5 лет назад

@@dynamicworlds1 I was thinking the same thing too, I mean we know many single celled organism as well as plants have "intercellular talk" of a chemical nature, its not hard to imagine that much like the eye, this is something that could evolve multiple times (same with muscle).

@Kassidar 5 лет назад

What's right > Who's right. If people understood this then arguments wouldn't so often degenerate into fights.

@adm0iii 5 лет назад

Oh, yeah?!?!

@SoronQuenta 3 года назад

@Kassidar Wise words to live by.

@thecoomler9921 3 года назад

Best advice ever tbh

@WanderTheNomad 3 года назад

The human need to be superior than others gets in the way of that.

@z-beeblebrox 5 лет назад

9:50 "CAN YOU DO THAT?!" NO I CAN'T I'M SORRY I'LL TRY HARDER D,:

@RoScFan 5 лет назад

I can with a flashlight. If the question is can i do it with my body... sure. I'll just swallow the flashlight.

@robinchesterfield42 5 лет назад

Maybe Dazzler, but that's about it...

@Sneemaster 3 года назад

Strain too hard and you'll give yourself a hernia.

@Taikamuna 5 лет назад

Still looks more attractive than me

@Entety303 3 года назад

Same

@siyacer 3 года назад

Lol

@clementineschalchen330 3 года назад

Yeah about the same there

@Orion_280 3 года назад

Go back to monke

@aa-to6ws 3 года назад

Yes

@dikaiapanoglou1924 5 лет назад

10:00 "we don't know!" for some reason I laghed, xaxaxa

@jerry3790 5 лет назад

“Strongly disagree” is the equivalent of a political debate in science.

@0XBlondie96X0 2 года назад

Videos like this make me wish time travel was a thing. Imagine if we could go back in time to when said first animal existed. Really just imagine getting to see all the bizarre and wonderful creatures that died out long before humans came onto the scene.

@John-mp4qc 3 месяца назад

and the birth of Jesus

@Emily-tv1iz 2 месяца назад

Or seeing the creatures we are well aware of but only in fossil form. We can only take so many guesses what they looked and acted like when we just have some rocks for reference. Like, spiders can be preserved, spider *webs* on the other hand, not so much.

@FuneFox Месяц назад

@@Emily-tv1izImagine going back and the dinosaurs end up being purple

@unknown-fk4hk 5 лет назад

So spongebob or the jellyfish he catches

@VanRukh 5 лет назад

How ironic. Sponge bob is the complex one

@ferrymayne5900 4 года назад

What'd you expect spongebob is the og

@ljdelaney2286 4 года назад

No , not at all. They said comb jellies, they aren’t true jellyfish. But you almost paid attention! Good job

@dynamo5326 4 года назад

@@ljdelaney2286 he literally said spongebob but u rather talk about jellyfish i see 🧐

@Astrofiave 3 года назад

Best comment here

@stove5035 5 лет назад

Mitochondria evolved from something we'd consider life to something we would not. It doesn't seem that far fetched that sponges would lose their nervous system.

@socrabate 3 года назад

The example is interesting, it just shows that jellies could evolve into sponges(because everything can happen) following that the other way around has been obvious all along. But how much this is possible gets exponentially low each time you take a look at a sponge. It would have required a tremendous multitude of features to relegate in order for a jelly to become a sponge. Sponges starve for any crap evolutionary advantageous feature anyone would throw at them, let alone letting go of some hard core packages that could also be diverted in countless ways and remain profitable enough to still be around, rather than disappear completely. Sponges look like the first dump, blind, senseless, unqualified arrangements that nature could offer...

@alexmaria9969 2 года назад

@@socrabate To be honest, they do have their merit. They're quite hard to kill (I'm just giving them kudos for surviving all mass extinctions that we had going on so far.) Maybe they diverged from the common ascensor to comb jellies to fill in a different ecological niche since resources may have been abundant at the time.

@architeuthis3476 5 лет назад

Animals are one thing, but multicellular life in general is big head trip: When did different kinds of cells start to live together in such a way that they formed a symbiotic relationship so profound that they were able to reproduce in the form of a zygote?

@walkerweyland7685 5 лет назад

Scientists have evidence of multicellularity evolving multiple times. A good example is Volvox, which started as a colony before it became a truly multicellular organism. So even though it is weird it apparently is not that hard to do. If I remember correctly its happened over 40 times in Eukaryotes alone.

@dynamicworlds1 5 лет назад

@@walkerweyland7685 yeah, the key to understanding it is to wrap your head around how colonies of identical cells function. From there, it just takes evolving some behavioural/specialization triggers and the species starts crossing the blurry line to multicellular.

@MetalKing1417 5 лет назад

@@walkerweyland7685 which may lead to an interesting conclusion- that the last common ancestor to all animals, may not have actually been what could be considered an animal at all.

@விஷ்ணு_கார்த்திக் 5 лет назад

Its simple really, the first Eukaryotes were Socialist Communists.

@RezValla 5 лет назад

It was a monday

@Vienna3080 5 лет назад

Imagine if we could map out all of the quadtrillion+ creatures/beings that has ever existed onto a tree to see every change up to the molecular level giving detailed explanations of each things life

@limiv5272 5 лет назад

Nah, that just made my head hurt

@alexmaria9969 2 года назад

Whenever that time comes, I'm in-

@gravijta936 5 лет назад

Regardless of what the first animal looked like, it most certainly tasted like chicken!

@Im-Not-a-Dog 5 лет назад

Naw, when the machines coded Chicken into the Matrix they didn’t know what it tasted like so they gave it the most ambiguous flavor possible.

@Master_Therion 5 лет назад

Ahh, but which came first, the animal that tasted like chicken or the egg?

@Aphrothena1221 5 лет назад

Even before we knew what chicken was

@BA5GH3TT1 5 лет назад

No, chicken tastes like it

@adlsfreund 5 лет назад

It probably tasted more like semen.

@TheFlashPod 5 лет назад

I also shimmer magnificently in blues and greens! #teamcombjelly 👌

@nickkazarian3334 5 лет назад

Awesome video, thanks Sci-Show! 👍

@faaaaah 5 лет назад

Thanks for reminding me I can't shimmer magnificently in blues and greens

@josephkoester3217 5 лет назад

you'll never find the first animal, Muscle hank killed it.

@albericponcedeleon2696 5 лет назад

And Hustle Hank stole the corpse

@shamerzaihan8638 4 года назад

Alejandro Franchini god

@jendragon42 5 лет назад

"Some still stand by the sponges." Hilarious quotes out of context

@gooderlabsllc8710 5 лет назад

FANTASTIC VIDEO! I have been watching Sci Show videos for quite a while, and this was one of the best, and most concisely presented videos you guys have ever made!

@gardenhead92 5 лет назад

God created sponges in His image

@tisFrancesfault 5 лет назад

You mean Comb jellies, you heretic.

@TJ-pg6up 5 лет назад

... in SpongeBob's name, amen

@saumyashah7978 5 лет назад

Stephen Bly nope. God created vacuum in his image.

@emancoy 5 лет назад

Spongebob is GOD

@adityamohan1773 5 лет назад

Spongegod

@aendir1927 5 лет назад

Waiting for muscle hank's funny comment

@Im-Not-a-Dog 5 лет назад

He’s busy chasing down Hustle Hank to get his protein powder back. Little bastard stole it again.

@ramshacklealex7772 5 лет назад

Next to your profile pic, your comment seems sarcastic. As in Lisa thinks Muscle Hank is _deeply_ unfunny.

@meandmetoo8436 5 лет назад

He's late

@stephenmiller9009 5 лет назад

@@Im-Not-a-Dog it's steroids

@pierrecurie 5 лет назад

I haven't seen either in weeks

@CyRose0o 5 лет назад

"Great 10¹² grandthing"

@brixitbiscuits8632 3 года назад

"Why does it need such a complex genome? We don't know!" Cracked me up, I don't know why

@CatfishShotgun 5 лет назад

This was really fascinating. Great episode, guys

@Shikuretto746 5 лет назад

11minutes 22second later, whats the first animal again?

@rollinwithunclepete824 5 лет назад

I was in the Team Jelly fan store the other day... Jeez that place was a mess, goo everywhere!

@LEDewey_MD 5 лет назад

Another amazingly well done video! What stands out to me on most of the SciShow videos that I've seen is that the material is not "dumbed down" - accurate and current scientific terms and names are used (even though they are probably over the heads of most lay persons), such as phylum names like Cnidaria, Ctenophora, and all of the subtleties of how these species are different, and how one establishes those differences. Great work!

@xc1971pp 5 лет назад

Great content. And I have to congratulate the host for all his effort for improving the quality of his presentations. It is paying him back. Good job on this one.

@walkerweyland7685 5 лет назад

I think the similarity between the free living Choanoflagellates and Choanocyte cells in sponges is not something to be over looked. It would seem odd if these cells evolved the same unique structure as sponges if Ctenophores came first. There are also issues of bottle-necking during the Jurassic in the Ctenophore lineage that can mess up estimates made by molecular clock studies. All of this isn't to say that the hypothesis stating that Ctenophores came first is impossible, but that hypothesis will have to account for both of these facts before I think it will gain widespread validity.

@dynamicworlds1 5 лет назад

Counterpoint: news.berkeley.edu/2012/10/24/did-bacteria-spark-evolution-of-multicellular-life/ those kind of bacteria structures are _really_ close to being jellies already. Just a little more cohesion, complex shape, and some specialization and you're there.

@walkerweyland7685 5 лет назад

@@dynamicworlds1 I think you may misunderstood what I was trying to say, this is in favor of sponges evolving first which is the more widely excepted view. What I originally was trying to get at is if Ctenophores really did evolve first, then the existence of these colonies would have to be explained another way which seems unlikely (Though weirder things have happened) Either way good article!

@tranquil_dude Год назад

What if choanoflagellates are just sponges that reverted to single-celled existence, rather than being sister group to all animals? Also, the cillia in ctenophores and placozoans might be homologous structures to the flagellae in choanoflagellates as well.

@y11971alex 5 лет назад

The newest phylogenetics paper supports sponges as sister to all other animals (Pisani et al. 2017).

@celinak5062 5 лет назад

@deletemymind565 5 лет назад

What is meant with "sister to all other animals"?

@y11971alex 5 лет назад

Wallmaster it means all other animals are descendants of whatever animal that did not become sponges.

@studioMYTH 3 года назад

Probably my favorite episode of SciShow! Great job dude.

@jj-qr4ro 5 лет назад

What an interesting debate! It was explained brilliantly and Stefan is such a good host, so eloquent

@mastershake8018 5 лет назад

10 to the twelfth grandthing, hahahaha... I don't know why that's so funny to me.

@leonardozaklikowski2773 5 лет назад

Hi SciShow! I remember reading a paper back in November of 2017 (pretty sure) that performed a genomic another analysis of porifera and ctenophora and with two different methods had both analyses result in porifera being the older of the two phyla. I'm sorry I don't have the paper itself (though i could probably find it somewhere), but do you know if this paper has had a lot of conflict or scrutiny and/or if you found it in your research? Personally I'm a team #poriferafirst guy, but I do love this debate :)

@mr.lonewolf8199 5 лет назад

Great video very educational. Thank you for this video

@zackerybartlett8050 11 месяцев назад

Something about the way this guy explains things makes it very easy to follow along and understand what he's saying. I love it.

@godsnotdead6973 5 лет назад

team comb jelly!

@glenngriffon8032 5 лет назад

The first animal was a midichlorian

@fallencolossi 5 лет назад

hahahahaha 😂😂🤣🤣

@comradeivan3903 5 лет назад

can they be influenced to create life?

@Im-Not-a-Dog 5 лет назад

The midichlorain is the power house of the Force.

@architeuthis3476 5 лет назад

Midichlorians are just "Operating Thetans" masquerading as mitochondria.

@Im-Not-a-Dog 5 лет назад

Archi Teuthis I think you’ve been reading the wrong sci-fi...

@fibbooo1123 3 года назад

Awesome video!

@ADT_-gx8vx 5 лет назад

Great topic!

@kirkhaskell9179 2 года назад

I think that there is a very fussy line between “animal” and “eusocial bacteria” I think the fist animals were a-lot like ant colonies, they weren't one organism but rather a bunch working together.

@rottweiler107able 5 лет назад

Can you please do a video on metal foam and/ or Amorphous metal

@KingSquidicus 5 лет назад

ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-az6oYcd-SfU.html

@apselvatti 5 лет назад

Really lovely, u guys rock!!

@sagenight3 5 лет назад

I love these quick cuts of Stephen yelling, CAN YOU DO THAT, WE DONT KNOWN

@ShahTalks 5 лет назад

Team Comb Jelly as it isn't unlikely that nerves were lost by Sponges

@pusspussmckitten 5 лет назад

Something, somewhere went terribly wrong

@VictorRodriguez-yx8mf 5 лет назад

Isn't that evolution in a nutshell?

@Hoshimaru57 5 лет назад

Comb Jellies are awesome looking. They have neon blue lines and cilia that pulse red to green like LEDs. They don’t look real in pictures, and they look even less real in real life!

@TragoudistrosMPH 5 лет назад

Top notch episode! I learned a great deal. Our neurons use some peptides to communicate, too. Maybe that was the first form of communication?

@daxxonjabiru428 5 лет назад

So back then we all wore square pants?

@christelheadington1136 5 лет назад

Nobody wore pants,until an apple told them they were naked.

@TerrariaGolem 5 лет назад

@@christelheadington1136 once the good fantasy novel was all the rage and gained a cult following

@champs20011 5 лет назад

Definitely & lived in pineapples with our pet snails.

@NINtendo72 5 лет назад

iirc Parsimony is fewest new assumptions, not necessarily simplest.

@lauring1499 5 лет назад

Should the simplest theory not by nature include the fewest assumptions?

@Insan1tyW0lf 5 лет назад

@@lauring1499 A complex model can be well supported by evidence and thus require few assumptions, and a simple model can be weakly supported or entirely based on assumptions. I agree it's a relevant distinction to make.

@adm0iii 5 лет назад

Is that an assumption?

@BertGrink 5 лет назад

Correct me if I'm wrong, but isn't Parsimony the same as Occam's Razor?

@KoawNature 5 лет назад

As an evo. biologist, I double-loved this video! Well done SciShow.

@avicohen2k 5 лет назад

Cool episode. More deep topics like this please.

@nightwishlover8913 5 лет назад

Thank you for actually mentioning Alfred Wallace...usually ignored in favour of Darwin.

@unleashingpotential-psycho9433 5 лет назад

The first animals look crazy 👍🏾

@pathologicaldoubt 5 лет назад

This video essay was impressively thorough.

@VEE727 5 лет назад

That's a really good analogy for fossil record.

@Im-Not-a-Dog 5 лет назад

Why are the C’s in the binomial names for Jellyfish always silent? I’m honestly curious.

@makeshift_battlefield_music 5 лет назад

Their name comes from the Greek word κτείς meaning 'comb'. The C replaces the K in English, but we dont have a syllable similar to KT so it is silent.

@makeshift_battlefield_music 5 лет назад

In other words, it's just easier to say it if the C is silent haha

@Im-Not-a-Dog 5 лет назад

makeshiftbattlefield Thank you.

@dynamicworlds1 5 лет назад

@@makeshift_battlefield_music interesting

@adm0iii 5 лет назад

Thanks. I was honestly urious as well.

@timsullivan4566 5 лет назад

Imagine that first animal to be fossilized - when it was dying, settling into sediment on the ocean floor, WHAT IF it could have known it was effectively taking Life's VERY FIRST SELFIE ?! What would be it's FINAL regret? - that it hadn't had time a SPONGE bath? Or that it had forgotten to COMB jelly it's hair? Sadly, we may never know...

@quasimeowdo 5 лет назад

Back to back dad jokes

@timsullivan4566 5 лет назад

@@quasimeowdo VERY observant - which is not all that surprising from one whose user name, quasimeowdo, is but a thinly-disguised anagram for: Q. - "Do u meow?" A. - "Si."

@timsullivan4566 5 лет назад

But I digress - shall we get back to back-to-back dad jokes?

@rickharold69 5 лет назад

Beautiful!!

@williamhardway6436 5 лет назад

I know we're all supposed to be learning and that's very important, but sometimes you guys are fricken hilarious.

@merrymachiavelli2041 5 лет назад

Isn't another reason to associate evolution with complexity that organisms work with what they have? Look at Tetrapods - all the many and varied things organisms do with their limbs still elaborate on the same basic four-limbed body plan, even animals that haven't used their limbs in millennia, like snakes and cetaceans, develop them in-utero. Because evolution works by adapting pre-existing structures, the result is likely to be more complex than if an intelligence worked from scratch with a functional goal in mind (a bit like how a retrofitted house is still likely to have inefficient or superfluous quirks as compared to a new-build).

@ZombieBarioth 5 лет назад

Fair point, but then that's technically still a "more complex" creature becoming less complex. That is, if you consider those to be less complex in the first place. That's the entire issue here, perception. I mean, is swimming less complex than walking? Is the way a snake's body expands and contracts to move less complex than ours? Even the reason we consider walking "more complex" stems from correlating it with our own evolution, particularly walking upright and intelligence, not because its inherently better. Yet some of the most intelligent non-human species swim and fly.

@apocalyptes3805 5 лет назад

@@ZombieBariothflying is cool, but you're never gonna be able to consciously manipulate your surroundings/eco system to suit your needs the way a homo-sapien can, even while having a genome ten times as complex.

@joperamod5760 5 лет назад

@@Dragrath1 Not on the same level

@Dragrath1 5 лет назад

@@joperamod5760 Define what level? Usually the distinction is made by manufacturing tools from non tool materials which New Caledonian Crows do meet. In this sense they have multiple adaptations to their beak to allow them to utilize tools better without having hands. In fact from research on birds and extinct nonavian dinosaurs the beak of birds likely evolved originally for tool manipulation only to be adapted to fill the role of teeth later in some lineages(those that happened to survive the extinction likely due to their diet). Remember that Theropod forelimbs were not able to move very articulately Intelligence as a whole through the animal kingdom appears to have evolved in an ad hoc piecewise manner with animals effectively being no smarter than they need to survive in part because intelligence is an expensive adaptation. We can't forget that regression is quite common as well though out evolution even though embryos often develop those traits before losing them. Humans are a good example having lost our tails and having highly reduced guts.

@timsullivan4566 5 лет назад

Oh jeez, SciShow now I'll NEVER be able to erase this image from my mind: tracing all the branches on the Tree of Life back up to the tippity-top, to that goofy, grinning, very first animal - Sponge Bob! (...help!)

@adm0iii 5 лет назад

Well, at least it wasn't Patrick.

@timsullivan4566 5 лет назад

@@adm0iii - Funny you'd say that, 'cause I DID have a brief picture of Patrick topping the (X-mas) Tree of Life!

@Serjgap 5 лет назад

the last few episodes were aspecially detailed and good

@marcopohl4875 5 лет назад

I hear Batman uses the principle of parsimony too, but he calls it "Arkhams razer"

@RedLeader327 5 лет назад

Delet

@roy4173 5 лет назад

If we're talking about our very first ancestor, I think it's more likely it would have been simple than complex. The categorization and nomenclature make some of the finer details troublesome and possibly arbitrary. Because at what point can we still classify an organism as an "animal" and not something that more closely resembles a bacteria? If you go back far enough, eventually, the first living things that is the progenitor of all living things is a single-celled organism, not an ape that evolved into a single cell, then back to an ape. I think the whole argument is just shifting the goalposts to fit whatever argument one side is making over another. If one side proposes the first animal looked like a sponge, the other could retort that there is insufficient evidence that that was indeed the very first "animal" (we didn't go back far enough). The other side, in turn, could say the first "animal" was more fish-like, which would be met with a rebuttal that we're no longer dealing with "animal" and something that is more of a proto-animal, so it's no longer the first "animal" in the strictest sense (we went too far). This makes the point of the whole debate seem meaningless and arbitrary. We all know life began with single cells, at what point those clumps of cells became "animal" seems like a semantics disaster.

@binky2819 5 лет назад

That can be applied to not just the first animal, but to literally the first anything that evolved. What we consider to be the first animal is decided entirely by us and not some objective, irrefutable piece of evidence. Evolution is constantly happening and there is no single point where one species becomes another. The more evidence we find, the more this problem will become about semantics rather than evidence. It's like trying to decide on the exact day in a person's life in which they stop being young and are officially considered old. It's pretty much impossible, and there will never be a universal agreement on when that is, but we have to make some sort of boundary somewhere. Even if the fossil record was perfectly complete, there would still be debates. But like Stefan said in the video, the point is not for one side to win, but instead to learn as much as we can about our evolutionary past.

@adm0iii 5 лет назад

First ancestor can be completely different from first life. If early life could share DNA between each other without any definition of "species" (as some life still does today), then LUCA (Last Universal Common Ancestor) might be very far developed from the first life. Or not; we don't know yet.

@tisFrancesfault 5 лет назад

I think you kinda missed the point. And we already have set the boundaries for what's an animal or not. An organism may evolve to be less complex if it finds it more advantageous to do so. Take the jellies and sponges as an example. The jellies could have been first. Then got lazy or stuck to a rock those good at surviving that way, Over time, evolve into a sponge because hey it works and none else are doing it. And being a sponge doesn't need to be nearly as fancy, wasting energy on stuff it doesn't need. So it gets rid.

@ExtremeExample 5 лет назад

The title of the video may be a bit misleading. The point of this 'debate' isn't to argue about what the first animal was; it's to find out where the comb jellies belong on the evolutionary tree in respect to sponges, cnidarians and other animals.

@PyrusFlameborn 5 лет назад

@@ExtremeExample also the debate of the first animal itself might also function to force us to take a critical look at the tree of life.

@-4subscriberswithahammerad521 5 лет назад

It looked like a chicken or an egg

@thstroyur 5 лет назад

More like a chicken omelette

@danboyle116 5 лет назад

Thanks. I couldn't sleep.

@seanhean6086 5 лет назад

I learnt more stuff from this channel than what I learn from my 3 years of biology class

@xck 5 лет назад

It looks like a fossil. Because it is

@antonyslack1 5 лет назад

Is something like a cone jelly fish in it's juvinial stage with a simple nervous system then in an adult stage it attaches in the rock and would filter feed on nutrients in the seas. Just a thought but it doesn't seem at that point in time, and as you said it seems from the fossil record sponges and jellies were on a continuum. What if it seems that way because it was that way? Just a thought

@GaianEntertainment 5 лет назад

Added this to a playlist, it's the closest I can get to double-"like"ing it.

@jakemarchbank 3 года назад

The fossil record is like your organic chemistry homework after your dog has been at it lol

@makeracistsafraidagain 5 лет назад

Greetings. I just got Jon Larsen’s book “In Search of Stardust”. My new hobby is searching for and photographing micrometeorites. As well as anthropogenic spherules. I put strong magnets in my downspouts. I think that this subject would make a great show.

@johnsjohnson 5 лет назад

why do vans always land upright?

@christelheadington1136 5 лет назад

No.

@enigma2536 5 лет назад

@@christelheadington1136 yes

@thomaspc0 5 лет назад

Thanks for the nap.

@MichaelMiller-rg6or 5 лет назад

I love the way the video ended

@OurFoundingLiars 5 лет назад

Well technically reptilians visited earth before life formed. Does that count? Keep asking questions

@johnm.6975 5 лет назад

Lmao

@adm0iii 5 лет назад

Why ask questions?

@just-a-silly-goofy-guy 5 лет назад

The first animal was Sans undertale

@storage8797 5 лет назад

Correct you are

@TonksMoriarty 5 лет назад

Yes, the first animal was without that game... Before the Kickstarter, we were all sans Undertale.

@olbluelips 5 лет назад

kremit the frog In the video he said “bony skeletons are relatively new” smh

@enigma2536 5 лет назад

**Megalovania starts playing slowly**

@Ngamotu83 5 лет назад

Am I the only one who laughed when Stefan popped up at 5:18?

@BobbyIronsights 5 лет назад

I love the scishow theme song.

@NickManJams 5 лет назад

Forget Team Edward and Team Jacob, Team Sponge vs Team Cnidaria is far more fascinating. Change my mind... ...Though, admittedly, making a Twilight joke in 2019 feels about as outdated as the early Cambrian and probably falls as flat as a layer of stromatolites.

@InvestingHustler 5 лет назад

The first animal was a molecule 🤔

@SuviTuuliAllan 5 лет назад

*magicule

@Alex80326 5 лет назад

An animal is made up of multiple molecules, or it would be considered a molecule

@Engenifffo 5 лет назад

What’s the turning point between chemistry and life?

@Engenifffo 5 лет назад

Terncote is a virus a form of life?

@Engenifffo 5 лет назад

Terncote i would say they are a form of life but not living. Maybe a good definition for living is being able to react to your surroundings and being able to self replicate without self deconstruction. It’s not that we can’t grasp these concepts with words but out terms are simply too broad and undefined.

@godpatlax_gm1703 3 года назад

That's so good

@vasilikid 3 года назад

my developmental biology professor suggested this video, really proud !

@nesseihtgnay9419 5 лет назад

the first animal was me, because i created everything

@stlkngyomom 5 лет назад

Insert yo mama joke here: Much like I inserted .... .... ...... in her! Over and over and ....

@nesseihtgnay9419 5 лет назад

@@stlkngyomom why you talking to your mom like that? XD

@unclekanethetiberiummain1994 5 лет назад

Unusual display but whatever.

@KnightSlasher 5 лет назад

"Humans are the true animals" _yeah we were the first_

@kuba_ota5154 5 лет назад

Nope.

@ralphnabozny8494 3 года назад

The algae sediment in my pool is orange when you stir it up with a broom, its a prism thing . same with flagella/cillia on ctenophores. so they eat algeae

@EverythingScience 5 лет назад

You guys are so close to a billion total views!!! 😱

@stopscammingman 5 лет назад

What came first, single celled organisms or creationist logic?

@enigma2536 5 лет назад

@skyem5250 5 лет назад

@@johnm.6975 Evolutionary theory doesn't contradict itself, and we have seen evolution happen in real time. You need to get a new flu vaccine every year because the flu virus evolves. Evolutionary theory explains some things that creationism doesn't, like men having nipples. There are no contradictions in evolution, just some parts in the history of life that we don't know.

@christianfajardo7732 5 лет назад

Awesome

@backwashjoe7864 4 месяца назад

Something else to add to the mission proposals list for the first time machine.

@johntillman6068 2 года назад

Outdated. Earliest animals were sponges. Our closest unicellular relatives are choanoflagellates, colonial unicells which are practically identical with the feeding cells of sponges.

@rustyshackleford9888 2 года назад

Actually, it's pretty current. This is still a hotly debated topic among biologists, as the video states in the first two minutes. It's very hard to know for sure since there are hundreds of millions of years of evolution obscuring the true relationships. The sponge lineages (which may be paraphyletic) have traditionally been considered the earliest diverging animal lineages based on similar morphology of their collar cells compared to choanoflagellates (like you say) and relatively simple body plan and lack of symmetry or complex tissues. But with genomic advances in recent years, there is increasing evidence that ctenophores may have diverged first instead. It's less intuitive than the sponge-first hypothesis, but it is definitely a valid argument. Evolution isn't always as cut-and-dry as one might think.