The science of symmetry - Colm Kelleher
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- Опубликовано: 12 май 2014
- View full lesson: ed.ted.com/lessons/the-science...
When you hear the word symmetry, you might think generally of triangles, butterflies, or even ballerinas. But defined scientifically, symmetry is "a transformation that leaves an object unchanged." Huh? Colm Kelleher unpacks this abstract term and explains how animal's distinct symmetries can tell us more about them -- and ourselves.
Lesson by Colm Kelleher, animation by Andrew Foerster.
The actors are like: "im not enought paid for this"
Lmao
LOL!!
XD
fax
He mentioned the mechanical advantages of being symmetrical. But most importantly, if you have a front and back end(head, tail), it is easier for DNA to repeat instructions laterally on both sides of the bilateral line, because, during cell division, it will take much more energy and time to duplicate a longer DNA strand for a non symmetric organism without any errors. As long as DNA can label where the front and back are facing so that arms or legs are not placed backwards, cell growing patterns in embryology become more straightforward. For those reasons, it is an advantageous adaptation because energy conservation can be used towards other adaptations which means greater fitness. It is also important for the outer layer of an organism to be symmetrical along with teeth.
Having finished biology degree. Bilateral symmetry of mammals is generally external. Once you counted internal organs. The arrangement is not equal left and right.
The title should be the biology of symmetry.
Yeah, I was thinking they'd go into physics of rocket ships and such
Nicholas Wright rocket ships are engineering and not physics. Though they use Physics in Engineering. Most importantly the shape is taken from biological objects like the rocket ship is taken from fish and birds etc.
there was a bit of mathematics in it.
Eh? Biology is science and fall into the sub-category Natural-Science.
Yeah I was thinking Noether's Theorem and maybe group theory, but it was mostly Biology
Interesting talk, but STOP DANCING DAMNIT!
I agree
It’s so distracting
It's so true
it looks more like stimming
am i the only one who actually enjoyed the video? xD for someone studying for her bio exam for hours i thought this was somewhat enjoyable lol.
Yea your the only one
Bloxy Bloxington i ... wow i don’t even remember this video or this comment. A lot can happen in 4 years. You probably don’t care but i granduated high school and now i’m a first year med student. But anyways, thanks stranger. Your reply made me reflect. :)
@@sultanahb5730 good luck with med school 😄👍
@@prinishaa1073 Thank you :)
How u doing buddy
i thought we were going to get into quantum mechanics
Foxes and butterflies ain't got nothing on Schrodinger's cat. It isn't just bilaterally symmetrical, it's SUPER symmetrical.
Yeah
@@JimboJamble schrödnger's cat kill JFK and didn't at the same time,imprison them
@@butterskywalker8785 yes bro
I think this is my favorite TED narrator.
Sorry, i could only think of "Dumb Ways To Die" video.
Those animations were great.
Awesome animation on this one.
My favorite one yet!
I remember the episode of cyber chase where they talk about symmetry. You forgot about slide symmetry which mainly implies to long things like fences and combs
4:40 the way u said "when reminds me of hot rod whiskey scene xD
Knowledge (singing note) , awesome, how a topic(excerpt) like this just hits you out of nowhere
That fox is so damn hilarious haha
Thank you for this helpful information
Genetics are even more important than symmetry in figuring out the tree of life. Similar phenotypic characteristics can pop up in separate places totally on their own. Symmetries are important to understand in phylogeny if there is some sort of discrepancy in genetic lineage, but it is supplementary information, more than anything else, in determining the tree of life. The beginning of the video veered off course into biology rather than sticking to a discussion of symmetries in all subjects, and made conclusions that, although correct, are not thoroughly discussed in respect to all other subjects.
great video. learnt alot
Gotta love his accent
Thanks I understood well 👍🏻
The animation is very enjoyable🤩
I love this video.
Great video on symmetry
When I hear Symmetry I hear: Gurl u getting an A+ on this Test! 😂😂😂
Don Corleone wat
very nice animation!!!
“Some Carls don’t exhibit any symmetry at all” I love this accent DEEPLY
It is useful
The animation of this video is so nice! way better than mine :)
nice explanation
My only issue here is that a lot of those rotationally symmetrical organisms that you said were less related, are also bilaterally symmetric.
I like the idea. But how does the definition of symmetry work with bilateral symmetry ? Is it transformation of reflection or something ? Anyway the definition is new to me and it is intriguing too.
The transformation is reflection in that case
amazing!!
( What's with the dancing? xD )
Great video!
besides,ofc, from the huge amount of symmetry in physics xD
may I suggest to read some Richard Dawkins' book to understand why we are bilateral and no, say, 90° rotational symmetric...; basically it's a matter of economy. it's better , as a fish, to differentiate a head from a tail (like they said in the video), it's good also to differentiate an top part from a bottom part (this simmetry is broken by gravity that pulls in the vertical direction) but there would be no gain in differentiating left from right... therefore evolution lead to an economy by having left and right look the same.
The animations are so cute!
This is so adorable
this should be a real stage play
Thank you
アニメが最高w
The animation is awesome!
How dare you do that to that poor triangle
Symmetry is not only in biology but it is found in the whole universe. From an atom to the biggest galaxies, all have some kind of symmetry involved and if you are smart enough to visualize this then I am sure you will find symmetry everywhere. Physics is arguably all about symmetry!
Have not you seen the asymmetric creature in the video ? It means asymmetry also exist.
i'd totally watch that play
deja vu
Well isnt this explanation wrong according to set theory since only rotation by 360 or 0 degrees is considered an identity under the triangle symmetry group.
Kid loves this video!
It is magnificent
the title should be dancing symmetry
This so reminded me of death the kid from soul eater
what is difference between radial and biradial symmetry ?
*Eats my symmetry
Me:I hate symmetry
Can I get this guy to narrate my biography?
You need to have a really interesting biography dude...
One time I removed a "Do Not Remove" sticker from a mattress and was never caught.
Colt Engineer
You gotta make a movie about that.
Colt Engineer You haven't been caught yet.
Are you bilaterally symmetric if you missing an arm or for example have a deformed eye?
Yes, because you still have the same ancestral genes and morphology that gave you your bilateral symmetry. And even if you were born with such deformities you're still the offspring of your respective group. That's taxonomy in a nutshell.
yes and no. to the universe you would be but to someone you wouldn't be. since we prefer symmetrical faces and bodies.
Remember that the bilateral symmetry is only approximate. Even if you have everything intact, you'll still have spots, scars or other features on one side of your body that aren't present on the other.
Thats an interesting accent!
All life on earth started in the oceans with an offset in gravitational pull from Spring Tides (FULL/DARK MOON) to Neap Tide (QUARTER MOONS) so it would of began there.
ALL life on earth is related and came from shared ancestory in the ocean.
The title should be "Symmetry and Evolution of Humans."
The animation of this motley crew looks funny.
what are the function of biletral symmetry plzz answer me fast
This video doesn't mention biradial symmetry.
Poor Triangle!
Good sir
With this video I felt like a little girl at the school
so like how humans have two ears, two arms, two legs, two feet?
Cool video
Nice observation Sherlock...
Ahaha, those animations.
Does anybody know why mathematicians have such a developed interests in symtrestrys? Especially in regards to really abstract things?
Why Segmented Worms is not Radial symmetry???
Death the kid needs to watch this video
It's safe too say Death The Kid would have a heart attack seeing that coral and not being able to fix it somehow.
What in heck is that shark doing at 4:38?
How did they get a tree in the schoolplay? Was it dropped through the roof?
+Thomas stampe Brock It's probably a cardboard cutout or a wall mural with real branches sticking out of it that were glued there.
Great
"It's called a head."
I still don't get how symmetry is a product of evolution..?
It's quite easy to get actually. When there's already genes for one half, the other can easily be derived from it.
Raul Pinto symmetry arose before there were animals. It's perfectly normal for a species consisting of very few cells to do this. Once the genes were set up to be used multiple times, any change to it affected both sides. If it wasn't useful, it could disappear. If it was, it stayed.
It's not ridiculous, you just don't seem to like it.
Tienen azogue!
this is so cute :)
Poor Colm Kelleher. Everyone is hating on his TED talk.
Am i the only one who was reminded of silence of the lambs by the thumbnail ?
What kind of music are those animals dancing? Lol
I know some people HATE it when others say this about them, but:
I love his accent. :)
everyone is dancing but there so bad XD
Am I the only one who expected biology more than geometry here?
And to top things off....where's my car...
IRISH ACCENTS
Their bodies are not really designed for something, you know (3'31)
im scard of the volcano
Who else is watching this because of online school
me
Am I the only one who noticed that it is left shark?
Why everyone is dancing 😁
Where did they dig this cultchie up from? Hahahahaha!
My teacher sent me this smh
What's super-symmetry?
Google is your friend
the logic of biologists attempting to apply symmetry to an evolutionary tree of life makes them sound crazier than conspiracy theorists. It's quite appropriate that this video explains its science on a stage in a theater. A place where all works of fiction can call home
Stop dancing please :D
am not sure about his accent. scotland? nah Indian?
Why do i think the speaker is Irish ? Maybe it's the accent. Did anyone else feel that ?
Was expecting some mathematics 🤔
Group theory 💀
Who else is here for school? :P
they should talk about physics instead, which is much more closely related to symmetry
Bhai mutna hai kya jo itna jaldi jaldi bakta chala jaa raha hai😶
The title should be called....Nothing...shouldn't be a title or this video...starfish....that should like make you be like...whaaaaaa...but the science travelers just believe...because it makes sense...sigh💀