Natural Selection and the Owl Butterfly

[@rax7]

holy cow man, physics, finance, chemistry, evolution, math, calculus..... dude, you know everything.

[@jenniferchrismadonna3628]

Dude your comment is 11 years old 11 YEARS OLD

[@hinasofy229]

@@crimsonnite9291 yours is 1 month ago!

[@nrcamper618]

@@hinasofy229 dude yours is a month ago!!

[@seshiria_4290]

@@nrcamper618 Dude 10 months

[@kaylah629]

​@@seshiria_4290Dude 3 months

[@xeztan]

To be fair I never fully understood the principles of evolution to a comfortable level but thanks to you I have now grasped and understood the principles of it. Thank you so much, you are a brilliant teacher.

[@sparklepearl996]

+xeztan ikr

[@thisisrtsthree9992]

+xeztan he is the Beast of Beasts, the Man of Sal.

[@brettbrzycki6845]

So brilliant he uses wikipedia for his "college"...

[@thinginground5179]

@@brettbrzycki6845 ?

[@StephanieSoressi]

thank you for the playlist - it really helps to have all the lectures in order.

[@Pr0x1mo]

I love when Sal says "dude."

[@selachimorpha2000]

They have the eye-looking pattern on their wings so that they can see better

[@RyderTheGayRaptorUwU]

No

[@vargvikernes4859]

Wot

[@mohdktln]

I find it so amazing that the butterfly was able to replicate the shape of the owl over a considereably long time.... Yet the Owl itself was alomst like "posing" the whole time waiting for this mimmicing to happen. Why are we assuming the owl did not evolve throughout the prosses of this? All life is evolving at the same time, how can anything adapt? how can a prey adapt or develop to counter an ever evolving predator? and vice versa.

[@riasatbinliaquat2799]

May be this , may be that , we can talk about all may be , except that may be it's an intelligent design .

[@cyberyamazaki]

Yes, all invertebrates, including butterflies, are able to re-grow limbs and repair any non-fatal damage done to them.

[@kerrywsmyth]

This video does as good a job as any describing how variations among species guided by natual selection causes the species to look the way they do. But what is never really truly explained in any class or video on evolution is how a butterfly and the lizard that eats it descend from a common ancestor.

[@alaoade]

Natural selection is just a theory. It doesn't make any sense to me. There are so many things left unexplained.

[@brianh614]

How does it not make any sense to you? Organisms with traits that impede it's survivability die out before organisms without that trait. The organisms without that trait live longer and thus reproduce more, increasing the amount of organisms without the bad trait (and with helpful traits). Pretty straightforward, actually.

[@kerrywsmyth]

m4keyourself what doesn't make sense is how creatures with vastly different traits and DNA can have a common ancestor when the process to make this happen would have certainly take longer than the time earth has existed. I mean think about it, the earth is only 4.6B years old, and we are told that it takes millions of years to make one new GENUS of life. imagine how long it takes to make a new family, order, class, phylum or even a kingdom! It just doesn't pass the smell test. This is just my personal opinion, but it seems like Creationists theory that an intelligent designer created animals in different, separate FAMILIES (they call them "Kinds"), and evolution took it from there to make the different appearances of these different kinds, makes more sense and matches the evidence we know.

[@adamwest6486]

Aidan Smith so they ate their own? Thats very unnatural as far as I know

[@Sam10947]

no in fact, i'm a phd student and engineer by training, and i know what probability is...the interpretation still does not explain how information is preserved by randomness, furthermore, having a certain pattern oright, but not when u have recognizable species of owl. IT's far over stretch as interpretation

[@DoctorDreadINC]

That still doesn't explain the creative and downright beautiful work that natures generates. I just don't think science can explain everything but gives new ground for philosophical debate

[@MrBenjington]

...footage of animals that display mimicry. But I think in the case of the butter fly its not a confusion based defense but more or a scare tactic. More to the point the butterfly is fully aware of this or else it would not be able to exploit it on command. Now I doubt they know they look like an owl but they know for sure that a quick flash of that pattern scare away intruders: here is a better pic - bit.ly\YdEetu nice video btw. Gotta say however that thing got, its wings it's pretty cool

[@RayUniStriker]

this guy should be the President of Everything

[@MikeTheFailboat]

My mind is blown once again. This really helped me understand natural selection better.

[@MrBenjington]

Just a quick heads up. Those butterflies are actually smarter that you might first think, they use this pattern in a very defensive way often waiting until a potential threat is close then they open BOTH wings very rapidly, and the image formed by both wings together scares the intruder away due to its likeness to their predator (an owl in this case) If you look for it you can find video footage of this being done to scare a way a mouse that got the close.. I think the bbc has some great...

[@Paddyllfixit]

....in each child.In the first child it expressed itself as "the happy spa" disorder (not my term)cannot recall proper name, and in the second child as Pader Willi(incorrect spelling) syndrome in which a person cannot stop eating, suggesting that there was something else at work here. After in-depth tests it was discovered that although these kids had exact same dna anomaly, one child inherited it from its mother, the other child inherited from its father, suggesting some kind of dna "memory".

[@pntrain5]

I understand that, but I'm referring to shift distribution, not narrowing of the gap in intelligence. There is not enough stress (or more efficiently, weeding of the weak) in current environment to promote the progress of evolution...in the way ideal theory of evolution is understood.

[@maxbarker1686]

you can't seperate id., science and evolution. although i'll give you this , you've done a pretty good job of convincing people who can only repeat what atheist's say and won't dig it out for themselves.

[@TheNthMouse]

This explanation seemed like it was only half the picture (probably because mutation was only very briefly mentioned). I'd be much more interested in a video demonstrating the rate at which a mutation for pigment change (not just lack of pigment) would occur, the genetics of that mutation, and the genetics for a mutation allowing for disparate pigmentation, allowing the formation of patterns; once those are in place I see no reason why it should take exceptionally long to any pattern to appear.

[@1Glowbug]

hahhaha love how the wings became more and more strangely shaped near the end

[@Essjaythegreat]

Can you do a video that explains the metamorphosis process of the butterfly and how this process came about from a evolutionary point of view please.

[@draymunoz]

It's an interesting thought experiment to think if we turned back the hands of time and let evolution run it's course would we end up with the same organisms? Probably not, because the novelties that evolution works with, the mutations, are themselves random. But that doesn't mean that evolution as a whole process is random. Things evolved the way they did because of the cumulative sum of traits that leaned more towards survival fitness that natural selection favored in a very nonrandom fashion

[@DoctorDreadINC]

So I'm not a religious person at all never was forced to go to church or anything. Don't believe any of the stories in "holy" or "divine" books (though may have some decent philosophical undertones). I am however a very spiritual person. Anyway I understand your point, that over time the eye looking thing evolved into what it is today after going through many variations.

[@draymunoz]

I enjoy all your videos, but I think it would provide more clarity on the subject of evolution if you wouldn't just reduce it to "random processes." Winning the Lotto is a random process, adaptation is not

[@Swetlana0]

I totally agree I also like the way he says GUY!!

[@MRTOWELRACK]

Although I (an atheist) personally don't believe in intelligent design, I respect those who do but also acknowledge the very strong evidence behind evolution. Many forget that spiritual faiths such as Christianity continually evolve, if I may say, to change their beliefs and accept new ideas. At one point, most Christians believed that the Earth was flat, obviously that notion changed. Imo, Christians should treat the bible as a guide for life rather than for all the answers to the universe.

[@PoetlaureateNFDL]

This is very interesting. This is great evidence for natural selection.

[@Freebirdsfearnone]

Science without religion is lame, religion without science is blind. albert einstien

[@blooms125]

How did you know that in your middle butterfly , the spots were aggregated in this particular place, It looks like you have deliberately chosen to draw the spots concentrated in this particular area to make your point valid, but what you have drawn is one possibility and one possible pattern among hundreds of millions of other random patterns, that the mathematical probability that the predator gets afraid of this one specific model is pretty minimal and approaches the zero. nice theory though!

[@sealclubber1383]

Obviously you're a really nice guy Khan. However, I thinks it's sad how you describe everything clearly, yet you still feel the need to backtrack and give a hundred disclaimers/clarifications.

[@thisisrtsthree9992]

+Vincent Miozza yeah that's what respectful people do, if you don't believe me look at japanese language.. if i want to ask you a favor in english, i can do it with some 5-10 words... in Japan... for that same message you need to use some 30-50 words... but oh well, i wouldn't say that being sooo respectful as them is good, cause, you know, suicidal rates are higher in Japan :( combine that with their lower rate of birth (i think the lowest or one of the lowest in the world)

[@TaelurAlexis]

He feels the need to clarify because he's a nice thoughtful guy. He knows there are many theists on YT who fear or automatically reject science because to them it conflicts with the "existence" of a God.

[@easyfixily]

thanks. you really helped with my school project. do you have anything on types of selection like stabilizing, sexual, disruptive and directional? or even patterns of selection?

[@octavcc]

Why Owl (Butterfly) when their wings draw show a 3D head of a reptile, rotated to the observer? Search on KZbin (because I can't put links here): "Inteligent... Evolution? - Snake-Butterfly"!

[@sydthegoat88]

I know this vid is coming from a passive point of veiw where it may be said we are a product of will-driven autonomous units which form increasingly complex components..and so on, (where on a concious level we only think we have free will). Im not trying to pose a philosophical question (ive removed the touchy-feely side of it), there's pattern to this

[@trailertrashtactics]

So... how does this variation and natural selection affect... per say chameleons? I know this is 10 years later but I'm interested!

[@Paddyllfixit]

@middleCmusic if that's the case, how did the butterfly come to realize that a factor in its survival was the "eye" on its wing and not some other factor. Of course I know evolution over many generations develops and improves whatever traits are necessary for best chance of survival but what "consciousness" begins this process. So if you cared to think a little deeper about it..............it's not just as simple as that.

[@jaydonkachappilly7151]

You absolute fool I know I came 8 years late and you probably realize your mistake the Idiocracy in this post is just too much for me too not talk about. First off consciousness is not required for the process of mutations causing evolution what instead is required is just natural selection to choose the best survivor and have them reproduce and if their descendants survive even better that trait becomes even more common

[@YamiLionheart]

Thank you for this video. It is an excellent response to the video posted by another user here: v=F2i4mUpmbdU. Wish he would've allowed comments so that I could link this to him.

[@sydthegoat88]

sorry to go on, but i dont mean just regular spikes in populations ect, but a woven function where the spike/curve frequency of other species traits such as camoflage or mimicry affect other species

[@adamwest6486]

The bit I dont understand is why isn't the eye design closer to the ends of the moths wings. Khan even mentioned my concerns in the Middle about eye being too close to the body of the moth but then didn't come back to it, so why now when the design by means of natural selection has stabilised/formed, why isnt it closer to the edge. Surely that would be the best survival tactic to gain thru natural selection?

[@Sam10947]

the argument about survivability depart from the assumption that early random patter did actually survive, in another word how did u conclude that primitve random spot were succeful at surviving.

[@ilayev9875]

anyone else saw the snake in the butterfly top wing corner? this is no owl this is snake head butterfly. everybody is afraid of the snake

[@TimmacTR]

@Dancetrupa Only if environmental stress (one of the two elements of evolution, along with random mutation) is very high. In places where environmental stress is low you have more variation within a species. Humans for example have very different attributes (although that may be a bad example since we are quite a homogeneous species, but that's another discussion) I'm not a scientist though, you might wanna double-check that..

[@TripperTrail]

This guy is going to found a company some day!!!!

[@MATTHEWMYTHHAVEN]

he already did

[@TaelurAlexis]

LOL Khan Academy is a company

[@DoctorDreadINC]

Especially considering how technologies seem to replicate nature. Its just so mysterious. Someone who thinks that science explains all (which it doesn't, esp WHY questions) is IMO just as arrogant as a religious fanatic nut-job. Btw Khan I'm not calling you arrogant as you have clearly stayed away from your personal beliefs in these vids. Science just seems to make the mystery of life even greater in complexity.

[@SlushGuppy]

Basically, but it would have taken forever to draw all the possible patterns. Plus, the proof is in the butterfly today, so basically he's on the right track. Haha.

[@ypey1]

you are only talking about the relative advantage of surviving other preditors that selected the distinctive structures. This is a "negative" selection. Another "positive" selection is the attractivenes sertain distingtive structures can have to the opposite sex of the species in reproducing. these second selection criteria can be less rational and more estetic then the first and gives perhaps more beauty to the natural world.

[@TimmacTR]

@Dancetrupa see wikipedia article called ''negative selection''

[@jszimhart]

thirteen minutes requires 13 years metaphorically of study to explore what he just exlpored

[@sydthegoat88]

I know this is a little off track, but can the frequency of points in 'species timelines' be plotted where a species evolves to a critical point (like h.sapiens) when natural selection is abandoned, and self-breeding starts, (selection due to abstract, long term planning; a higher level of sense of self/peer interest) Would these events offer a window into iterations of time/chapters in the genome

[@marinellierivera2477]

Question what if an animal hunts butterflys and owls?

[@gonzaloayalaibarre]

Then those butterflies are screwed xD

[@DM-ce6su]

then there would have been some other variation that would have survived,and there would be some other shape/pattern/design on the butterfly. which pattern?-whichever would provide maximum protection against said animal(maximum survival).

[@pearlinperil9985]

omg u are a genius

[@EuphieKaIndigo]

Moths aren't scary though :/ I'm sorry you have a fear of moths, that must suck. Are you afraid of butterflies too?

[@pntrain5]

Hey Sal, how do you explain why some geniuses are born from ordinary parents; does it mean all of us have the genes hidden inside us for gifted intelligence, and if so, how do we take the next level of evolution, like cavemen to men when natural selection doesn't apply to us any longer...

[@NealChauhan]

2:24 LMFAOO

[@thinginground5179]

?

[@paulceltics]

some good stuffs

[@8964-Winnie-Poo]

But would not their predators have evolved too...maybe better picking on the particular pattern...so the butterflies would be selected away from the pattern?

[@wasd____]

Not necessarily, because there's less pressure on the predators. If the predator doesn't evolve, they might miss a few meals (but will still probably be able to reproduce, therefore being fooled by these eyes isn't a source of selection pressure). The butterflies, on the other hand, lose their lives and don't reproduce if they get eaten because they lack the disguise, so the disguise is very strongly selected for.

[@Hollowdude15]

Nice video😊❤

[@AbiElectric]

@ViraIVideos Yes but however without mutations there is nothing for nature to select. Say a giraffe, the giraffe has obviously mutated a gene for a longer neck gradually over millions of years. Nature selected this gene as the best and so only long necked giraffes survived. Natural selection is something that leads to evolution. But in essence they are the same.

[@browsertab]

@leejae Change the world.

[@brackpersian]

imagine human faces on butterfly wings

[@languageandmana9255]

Wow! 💯💯🙏🙏🙏

[@jwfcp]

good effort, but ease up on the colloquial use of the worth theory, just say "speculated" when thats what you mean. throwing theory around carelessly leaves you open to glib dismissals of "its just a theory", when everything in science is just a theory, from atoms, to germs, to gravity :P

[@Superchairkimmy]

when did he say "dude"? :D

[@resler101]

Best teacher ever! This has really helped me. It will also help me argue with my religious friends, heh.

[@Sam10947]

to have an owl like face u need information, to have information u need a memory element, a memory element is the opposite of randomness. So how the fuck can randomness create information and how the hell derived the source of the information.

[@RayUniStriker]

I mean 3:20

[@nu.wa.n]

information is stored in dna

[@AbiElectric]

@ViraIVideos lol I don't think you understand evolution... That IS Evolution/Natural selection.

[@epiglue]

@theinquisitor i like this

[@bobboo2502]

great video see more biology videos for key stages 1 2 and 3 on Drredfrizzles channel

[@Hollowdude15]

LETS GOOOOOOOOOOOOOOOOOOO🎉

[@sagnikganguly4651]

Well, the latest comment after mine is from 2006!

[@marvink.9369]

Question: Are there any animals out there with more than two eyes? Nevermind :) Google answered it for me.

[@thisisrtsthree9992]

+Marvin K. Question: what did you find? Nevermind :) i really don't care tbh.

[@Tom51359]

spider

[@justinxin8415]

@@Tom51359Spooder

[@shayan894]

6 people have never red a book

[@RayUniStriker]

haha yea 3:23 all the way!

[@VungL]

I think the real question is how and not why... Just saying 😑

[@shayan894]

6 people have never read a book

[@lifeinkorea1722]

Why does it has only four legs ;( creepy! Huhuhu

[@Drunkenprophet23]

Good video, good reasoning, but I just don't buy it. That wing is the result of an artist at work.

[@maxbarker1686]

no he didn't stay away from his personal beliefs. he couldn't have stated any clearer that he's an atheist and that id is not science. when in face you can't seperate id, science and evolution !

[@Paddyllfixit]

nice vid, but I have a few questions Sal. Is the owl butterfly self-aware,ie do they slowly discover that this "eye" can be used for protection? And if so, do they have the capability of consciously designing an "eye" for the best effect? no sarcasm here, but there seems to be a very important factor missing in order for this "eye" equation to work. I recall watching a great doc where two children from different families both had the exact same dna anomaly but it was expressed differently...cont

[@michaelnaumann4898]

U

[@diamondgirls3898]

bilogy bits you have no vids

[@user-uwo]

arabic translate are not complete

[@maxbarker1686]

guess why you're a spiritual person !

[@asseeninYOURDREAMS]

can it be sexual selection?

[@MustNotRead]

it also looks like a sausage

[@fastbreather]

Evolution is a belief based on scientific hypothesis. But no one was there to see how the world began and progressed and no one will see how it ends either. I accept your evolution theory but you are wrong in my book. I believe in ID but I will sound wrong in your mind. Fine. We move on.. and we both die eventually because everyone dies. Whatever is there after that.. maybe we could gain some wisdom one way or the other.

[@narwhalpoop4life]

lol WIKIPEDIA :D

[@controllerfreak78]

@jumb0mumb0 Thumbs up if I agree with what?

[@TheZubiee93]

You sound like woodysgamertag lol

[@lightchipster]

Ugh, I have a fear of moths, the start of this video was unwatchable.