Exploring other dimensions - Alex Rosenthal and George Zaidan

View full lesson: ed.ted.com/lessons/exploring-o...
Imagine a two-dimensional world -- you, your friends, everything is 2D. In his 1884 novella, Edwin Abbott invented this world and called it Flatland. Alex Rosenthal and George Zaidan take the premise of Flatland one dimension further, imploring us to consider how we would see dimensions different from our own and why the exploration just may be worth it.
Lesson by Alex Rosenthal and George Zaidan, animation by Cale Oglesby.

[@maxihax2187]

Dont we just love explaining 4D on a 3D Universe in a 2D Screen

[@sohamha]

by your 1D brain(not original btw)

[@mrjam7038]

Excuse me what?

[@saniru5064]

Soham Halder I was gonna comment that 😂

[@saniru5064]

레리오 wooooooooooosssshhhhhhhhh

[@hadroncollider1155]

On a flat earth

[@cbuddy5970]

We just gonna ignore how square homie just got murdered? 0:36

[@rainierderryl2230]

We all did. We cried in silence

[@derpatel9760]

rip squary boii

[@Paprikaah]

Rest In Peace Boiii

[@ANKITYADAV-nv9wv]

F

[@aidangreen6376]

F

[@j_lanelee]

I literally almost cried at the end. "Dosnt that blow your little spherical mind?" Yes. Yes it does sir

[@CasperSoulET]

I had tears in my eyes thinking how little and insignificant we are

[@ericporter831]

@@CasperSoulET what

[@j_lanelee]

@@CasperSoulET God is Good and great

[@maxstatue4506]

it sounds so great

[@eriksantos418]

You're cringe

[@nicknice7839]

Here is TED-Ed explaining four dimensions, And I still can't BELIEVE that people say ThE EaRtH iS fLaT

[@Ayush.Sharma]

Maybe they are people from a 2-D world who don't know about 3D lol

[@nicknice7839]

@@Ayush.Sharma true

[@zanisenghor8982]

Very true Sharma ji ka beta

[@riaveronica1610]

@@zanisenghor8982 😂😂😂

[@senabondara1992]

They definitely two dimension beeing

[@firenationfiles2063]

Can we just stop for a moment and admire the animation?

[@user-kh6bu7dg6d]

Yes we can

[@fivesix3868]

Fire Nation Files Cute animation faces!!

[@sauceaddict9569]

Fire Nation Files FR🙌🏾🙌🏾👏🏿👏🏿👌🏿👌🏿

[@raahimhadi4905]

👏👏👏

[@Zandigo]

Way ahead of you

[@Itsallgoodtogo]

NO it doesnt blow my mind... it makes me sad that I'm limited to 3 dimensions :(

[@guzmus1196]

Actually, u can only see 2 dimensions. Just like a 2D shape can only see a 1D shape and a 1 D shape sees nothing. Only 4 dimensions can see 3D. Just imagine if u could see everything around u at every angle. U cant. But that's how actual 3D is viewed

[@haqeimhafeiz5804]

+Merlin Gerlosa lol best comment ^^^

[@LectureCat]

+Jerry Man We could be limited to infinite dimensions for all we know!

[@ruadd4592]

+Guzmus We have 2 eyes, we perceive 3 dimensions.

[@UnframedAnimation]

+Jerry Man :(

[@bentheartist7784]

a quote from bill cipher "you think those chains are tight? imagine living in the second dimension, flattened minds in a flat world with flat dreams. i liberated my dimension stanford, and i`m here to liberate yours," thats him. bill cipher.

[@shivam7156]

Oh wow

[@bentheartist7784]

@@shivam7156of

[@maskrlzxw6823]

technicallly bill cipher is in from the 4th dimension

[@slamyourheadin9449]

@@maskrlzxw6823 no he literally says he’s from the 2nd dimension

[@harinijayasankar8884]

So basically, when a 3D sphere passes through the Flatland (2D plane), a 2D being such as the mentioned square will only see a 1D line changing sizes. But as we 3D beings can see from the top, they are actually 2D circular cross-sections. .. Similarly, if a 4D sphere passes through a 3D world, we 3D beings can only see a 2D circle growing and shrinking, while in actuality it would be 3D cross-sections.

[@alephnull6785]

Nice this is the best summary

[@jeslinanista2907]

Ok I saw a video on this and it says 2 dimension species can only see thorough 1 dimension 3 dimension species can only see thorough 2 dimension Implying 4th dimension species can see thorough our 3d world This leads to an infinite series (This also implies that we really are seeing the 3d world through 2d but with the help of light and it's perceptions we could figure out what 3d looks like, that sounds crazy)

[@serpentmaster1323]

Yes. But remember, that while the visual plane of the flatlanders is 1d, they still perceive and understand space as 2d, because they can perceive depth as brightness. Similarly, we can also only see in a 2d plane, but we to can easily perceive depth because of our two eyes and our brains.

[@danivanon]

@@serpentmaster1323 so how would a 1d world see? In 0 dimensions?

[@anthonydraco7958]

This summary is incorrect. 3D object visiting 2D plane, you see 2D object changing size. 4D object visiting 3D plane, you see 3D object changing size. So if you see 4D hypersphere in our dimensions, you’ll see a sphere changing size.

[@soondae3]

You really do not understand how much I love this video The music, the imagery, the explanations, the hook in the beginning of the video, the speaker’s voice, the little story about the 2D square, and the little part at the end where the speaker says, “Doesn’t that blow your little spherical mind?” I LOVE THIS VIDEO

[@sharath55555]

my fav ted-ed video😊

[@ayennicoleeusebio7907]

mee too ❤️

[@pierpaolocasamassima8652]

Me too, this video is just right

[@soondae3]

Pierpaolo Casamassima I KNOW!!!

[@vivektomar2500]

I absolutely effin love this video.... 😭

[@cyclingcycles7953]

"Doesn't that blow your little spherical mind?" Flat eathers: What spherical mind?

[@bigbrother7952]

Flat circular mind..! 👻😅

[@vedantsridhar8378]

Say to Flat-Earthers Doesn't that blow your circular mind

[@hwgoblin]

TED-Ed: Doesn’t that blow ur little spherical mind? Me: It blows my mind, yes, but my mind is not a sphere.

[@pikachu-jf2oh]

They don't have brains lol

[@shauryanrana3906]

*Flat Earthers: What's a mind?

[@matthuck378]

I've often wondered if many (or all) of the supernatural things people have been claiming to see over the millennia (everything from demons/angels to ghosts, UFOs and even cryptids) are actually higher dimensional things passing through our 3D world like the sphere passing through a plane.

[@PoopoopeepeeMan2]

that actually sounds cool

[@radd.q6117]

GOD is almighty and he decide that for humans 3 dimension is a perfect living place so if GOD send an angel to you he will make sure that the angel is 3 dimensional. But GOD is above every infinte dimension and every thing that exists. In fact he is the one who created every single thing that exists in the Universe!

[@matthuck378]

@@radd.q6117 OK, then. Question: If "GOD" is omnipotent, omniscient, and omnipresent...Why do most of his followers either ignore or bicker over HIS teachings? Also, no one intelligent and compassionate blindly follows any one religion. Also, nothing you said is "fact" it's just your beliefs. That's fine, but keep them to yourself. Your evangelizing is so exhausting for the people around you, I bet.

[@PoopoopeepeeMan2]

@@radd.q6117 Top ten ways to start a fight.

[@binbows2258]

@@radd.q6117 God isn't real, and talk like this doesn't belong in the comment section of a scientific video based on actual math, science, and reasonable theory. God is nothing but pure speculation and "trust me I heard his voice" type stories. You have no proof and no reason to be acting this way here.

[@lakhansaha2068]

"Also called the Tesseract" My spherical mind: LOKIIIIIII

[@rajat2cool295]

I don’t get it!

[@kumarshivam1234]

Haven't you seen avengers

[@ShubhTandon]

SERIOUSLY!!

[@spikezkid022]

That sphere is making me feel happy about everything in life :)

[@haqeimhafeiz5804]

:)

[@gcyeow1963]

😊

[@therobloxultra5694]

:D

[@MysteryHendrik]

Me too. Until it denied the existence of the fourth dimension.

[@jesus_is_god_and_you_know_1669]

+MysteryHendrik yeah what a bitch moove that was

[@thalespro9995]

1:30 the hexagon is bullying the square

[@TiberianFiend]

In the story, polygons with more sides had higher rank in society.

[@pnute6331]

It booped it him, pushed him and then said "bprr" which in flat land language, is quite rude.

[@sosopwsi829Jjw9]

@@pnute6331 translation plz

[@asher-360]

Tiberian Fiend Circle: 😔

[@PhantomAyz]

I guess it's not hip to be square

[@skitsnsongs8100]

Fun fact: paper or anything drawn on paper is still 3D it’s just that the hight is less

[@Mark-Wilson]

@@GumballWaterson1990 yes did you actually think it was 2d the atoms and molecules are three-d and still have height and it isn't that small

[@Mark-Wilson]

@@GumballWaterson1990 yes did you actually think it was 2d the atoms and molecules are three-d and still have height and it isn't that small

[@anthonydowney9675]

Images within a screen are 2D no?

[@Mark-Wilson]

@@anthonydowney9675 yeah but the screen itself is 3d just is very thin but the image is 2d yes

[@anthonydowney9675]

@@Mark-Wilson so AI could communicate in many different dimensions since they are not directly constrained by form. Although they are not autonomous as of yet.

[@yingo4098]

for some reason, this made me cry

[@stellasoleclark5586]

Me too

[@carlroberproductions4006]

If a 1 dimension line doesn't make a shadow, a 2 dimension square makes a 1 dimension shadow, a 3 dimension cube makes a 2 dimension shadow, de 4 dimension hypercube must make a 3 dimension shadow

[@carlroberproductions4006]

Sorry for bad english

[@hannibustoogfyrre6074]

yep

[@awesomeerk1197]

Hmmmmmmm true I wonder what it would look like with my 3D mind.

[@hannibustoogfyrre6074]

AwesomeErik a cube would be my guess

[@lathencoon6305]

That is not true a 4th dimensional being or shape would be just a 3D shape but it has time in its dimension, so it would just have a 2D shadow.

[@nessybomber1581]

why do I learn more on KZbin than at school?

[@emiliosgregoriou8943]

+Nessy Bomber Reasons

[@xboo1x]

I do to

[@philipmalan4967]

+Nessy Bomber Cuz you don't pay attention in school ( ͡° ͜ʖ ͡°)

[@mohsinraza6730]

same here

[@Adam-ug9dw]

Me too (;-;)/ bye teacher

[@rohansahni9701]

I always cry when I watch this video. The music and the animation really set the mood.

[@hrishi6352]

You are understanding 4D In a 3D world On a 2D screen With your 1D brain And 0D of understanding

[@guy6074]

1D brain… what? What are you talking about how is our brain 1 dimensional lol

[@Star-st2nr]

I see so u are man of culture

[@bodhisattva9762]

Speak for yourself. Replace 'You are' with 'I am'.

[@wokk9543]

@@bodhisattva9762 lol

[@reuelcelestial9567]

The brain is 8D

[@mr_niceman]

Brain.exe has stopped working.

[@pinhe1350]

sphericalbrain.exe !!

[@Idiotic4454]

404 brain not found

[@justinoxy]

brain.exe started working:)

[@humanatee6639]

Brain.exe is not existent.

[@speenta4879]

666 likes

[@a_yan6581]

" Also called the Tesseract " *HOL' ON...*

[@hello23241]

Uhh sowat?

[@artofvale_1122]

Me as an Avengers fan: *_surprised pikachu face_*

[@xail1182]

*AVENGERS, ASSEMBLE*

[@artofvale_1122]

@@xail1182 *assemble but ok

[@xail1182]

@@artofvale_1122 thank u

[@moyeenm.bhuiyan6249]

I have been watching Ted-Ed videos for the past few years and so far this one it's the greatest one I've watched. So awe-inspiring and moving.

[@wazaDev]

I watched this video a few months ago and now I'm basically making a game about a square fighting to get to the 3rd dimension... thanks for the great video

[@programmer4047]

Is your game ready now?

[@wazaDev]

@@programmer4047 yes it is 😅

[@programmer4047]

@@wazaDev Is it for Android, iOS or Windows? Btw, what's the name of your game? Can you provide me the link?

[@danielavanilla4331]

@@programmer4047 hopefully they’re not lying for attention haha

[@isunlloaoll]

This is so cute i almost cried...

[@DS-Pakaemon]

same here

[@daniyalshah1503]

i know right!

[@therudestofclouds2007]

Tomas, was alone. huh, what a weird first thought to have.

[@lucaslayton3974]

the rudest of clouds omg i had that in my mind too! the geometrical objects and music really remind me of that game :)

[@theindiediary5950]

This 4 minute vid was better than 99% of Summer blockbusters......

[@tammyxu3700]

My 3D mind feels unable to imagine a tesseract. 😂

[@want-diversecontent3887]

Tammy Xu We cannot imagine something beyond our limitations.

[@neutralpie420]

*Loki has joined the chat*

[@francinequinn4690]

Tammy Xu My mind can pictures lots of Tesseracts

[@ishworshrestha3559]

Yes

[@Amazingthings0]

It's just bulshit brother he said extend 3 more lines perpendicular to the 3 existing lines, so basically each of the new line will be in the other 2 existing planes

[@_AN203]

"Doesn't that blow your little spherical mind ?" Words I won't forget.... This is what I like about learning !!! Curiosty!!!!!!

[@ASOT666]

This is going to sound dramatic, but I'm about to cry from joy. I've wanted to know for months how we would hypothetically visually experience reality if we were shifted to a 2-d universe. I can't believe I'm alive in a time where I have the access to this answer in an "explain like i'm a 10 year old" at my finger tips, on such an incredibly animated video.

[@IndustryOfMagic]

4:30 "Doesn't that blow your little spherical mind?" **BA DUM CHSSSS**

[@serninsquad1332]

I'm just replying cause no one has in a year

[@maidul97]

Sernin Squad Lel

[@Nny_777]

yes it does

[@shruggzdastr8-facedclown]

IndustryOfMagic: It's more of an oblate spheroid, but OK.

[@jjame42]

XD

[@thirdperson438]

Imagine you’re 4 dimension and your shadow is 3D. Doesn’t that blow your mind?

[@ILik3PH0T0]

+Cardin Bui well for all we know so far, theres only 11 but I get what you mean.

[@Jkjoannaki]

+Cardin Bui a 3D shadow would look like a ghost

[@3evibez817]

+Cardin Bui ADVENTURE TIME

[@TheRightWay11]

Everyone thinks of shadows as something special. Quite frankly its not even there, its 'existence' we have given it is just an illusion. They are just an absence of light, like how cold doesn't exist either, just an absence of heat. That is why we have absolute zero and maximum darkness because they all depend of the absence of something. E.g. you cannot add more 'cold' to make an object go beyond absolute zero.

[@philipmalan4967]

+QuantumBeing That is not the point -_-, imagine replacing every 3D object in the world with a 4D object and replace every 2D picture of an object with a 3D picture of an object O.O

[@canadianrocketman3475]

ive always thought of writing a book about a 1 dimensional world where the social hierarchy is based on how far up you are and since there is no way to go around others you are stuck in your section from birth to death. the story would then follow a dots journey of entering the second and third dimension to advance his species understanding and abolishing the 1d social hierarchy. but then i would always remember that i cant write.

[@MarloTheBlueberry]

I can write it for you.

[@jeffthewolf4589]

I’m fascinated, that’s all so incredible, a little gout dropped from my eyes at the end.

[@bhonepyae9978]

Flat earthers live in flatland XD

[@rumahhafidzahbekasi1354]

and then they get killed when itroduced to the 3d space becouse its like you can go trough concreat

[@trikster22]

yes! and their 1 dimensional brain

[@Azure_Gust931]

But earth is flat in special view,doesn't that mean all of us are flat?

[@meep.472]

We have an intellectual in the house

[@derickalli2166]

Lol yeah right

[@yangkong7935]

What if flat earther aren’t crazy and they can only visualize in two dimensions?

[@lightningcreates1271]

That would be strange...

[@aryazeref]

That's possibly the case, probably there's a 2d complex or something some sort of dyselexia thingy

[@4pf_gabru]

We can only see in two dimensions. Our brain jus puts the images together to give us depth

[@henloworld514]

Well all humans actually see the world in two dimensions. It’s just that lighting and things getting smaller/bigger let us know about depth. It’s like how the 2d shapes could only see in 1 dimension.

[@ishworshrestha3559]

Ok

[@TotallyAHuman]

This video is a masterpiece. It's so much fun!

[@zimianxcience4665]

Great animation & explanation with a story to tell. Love the music. Thanks!

[@pratik8792]

When the 3D cube extended into 4D cube. My brain went on a long vacation.

[@radhikamalviya5196]

Try imagining it. Like, a cube on a cube, but a little distant from all the lines of the previous cube, say 1 cm. You get anything? And that's a tesseract!

[@myyou7335]

A smol cube inside a big cube then u connect their the corners with a lign.

[@krassilverfang5504]

What if Dark matter is just 4D matter interacting with our "3D slice"?

[@atmikavishwanath4667]

Oh my god! I have a feeling that you are right! Thanks for this idea

[@samuelvanorshaegen]

Thank you very much

[@amandaspellen2113]

@@avw5kt that's a very interesting point of view!

[@shikharsinha6407]

Never thought of it this way but could be true.

[@maze7050]

haha

[@Sadik-568]

The animation, the narration and the music are all excellent.

[@adrianesmerio449]

Thank you for this in every way possible in understanding the third to fourth dimension

[@FacesDeluxe]

So if I were 4D I could see inside my friends.

[@hellothing]

Faces Deluxe 9000+ yea, like a mri scanner

[@jamrose6322]

Faces Deluxe 9000+ no but you could see his future, past and present.

[@jamrose6322]

Faces Deluxe 9000+ basically, you could his life.

[@hirokokueh3541]

but time is not a dimension

[@bentucky4324]

Yes. But it won't be like x-ray vision. It'll be like the inside out of your friend. For example, turning a tennis ball inside out.

[@maxinedudgeon8246]

Wait so if 3D objects have a 2D shadow would a 4D object have a 3D shadow?

[@SuperBabyMario0C]

Assuming light and darkness function the same in the 4 dimension. Shadows are basically just spots of no light bro. Shadows are everywhere all the time there's just light coving them

[@asteroidkatfacts1036]

yes

[@zed8762]

If 4d has 3d shadows it's like your clone now

[@Mr.Sozzled]

@@SuperBabyMario0C actually he is right. In the fourth dimension they would have 3d shadows. Look it up

[@arnavanand8037]

The wall on which your shadow would be printed is 3D but the surface is 2D no matter what. Thats why the wall also needs to be 4D and you can't have 3D shadows in this world.

[@claramelb7476]

Best thing I’ve watched this year so far. Thank you!

[@Manas__Gharat]

This was simplest explanation of all that I can find on the KZbin. Thank You 😊

[@fkyouronion]

3:46 *showing point and extending 1 inches each* Hhh, that makes sense. *showing tesseract* (brain explodes)

[@jaydenchaney4081]

Draw 2 cubes one higher and to the right or left of the first and connect the corresponding vertices

[@untruelie2640]

That wasn't a Tesseract. A Tesseract can't be imagined or pictured in a 3D world. What appeared in the video was just the PROJECTION of a Tesseract in 3 dimensions - like we can project a cube on a two-dimensional plane.

[@reinatr4848]

@@untruelie2640 well it was actually projected at 2 dimensions, because the screen is 2-dimensional.

[@untruelie2640]

@@reinatr4848 No, it was projected in 3 dimensions. The screen replicates a 3-dimensional image on a 2-dimensional surface; yet it still appears 3-dimensional. The third dimension is width (or depth), which one can still perceive when looking on a screen.

[@reinatr4848]

@@untruelie2640 So the 3 dimensional image is projected on 2 dimensions?

[@laki74]

Does one still have to pay taxes and the mortgage in the 4th dimension?

[@mrbisshie]

Yes, there are Jews even in the 4th dimension. Their reach is limitless.

[@jojojlc7070]

Sure, except they're a whole dimension higher

[@danielberglund6611]

Yes

[@Leonardo-G]

No, but 4D eliminates tangled headphones and waiting at traffic lights (lines in 4D can’t be tied in a knot.

[@drofindorb9728]

Leonardo Gil Rojo why not?

[@KK-jp5fu]

“These shapes are all scurrying around a flat world living their flat lives.” I got offended

[@kazzakhs]

Love watching TED Ed videos, been watching them for a long time, but this is the first time I've commented on one as this is definitely the best, most moving and beautiful ones I've ever seen. It just leaves you feeling great ... :) In the era we live in now, it's important not to lose the gift of 'imagination', the thought of possibilities and magical ideas which our ancestors had but we now feel to be completely crazy...

[@randomhooman6685]

Why do I feel bad for the sphere when he can’t help square boi go to higher dimensions

[@itskelvinn]

What if paranormal activity, things appearing and reappearing (ufos, supernatural phenomena) is something 4d accessing and exiting our 3d plane?

[@barronrisling5354]

I watched a "scary" movie about a poltergeist, during witch the experts on the matter were talking of the ghosts being lost in another dimension, where there are no straight lines, ect. And then I thought the exact same thing. I think I have a new personal belief. Just think, in higher dimensions, time can actually be represented as a physical space. Knowing that, could our 4d (3 spacial dimensions and time )universe be inside a 5d space, where every moment in time is a physical area? so people who in our 4d universe who have been dead for a long time could still exist in a 5d world, hence why when they pass through our dimension, they look strange? IDK, but I know this rant is what I'll repeat when somebody asks if me if I believe in ghosts.

[@horrorandgames]

This idea is also a main idea in the movie 'Interstellar'

[@itskelvinn]

Wout Kops kind of. the 4th dimmension in that case is time. and the tesseract allowed cooper to access the bookshelf

[@1234macro]

+Barron Risling Well everything they do will happen at the same time. He will be both dead and alive.

[@philipmalan4967]

It is impossible because it would break all the rules of physics and math(any 4D object has infinite mass and any 2D object has 0 mass). In a 4D world, a 3D "world" would only be a slice of the 4D world and 3D objects wouldn't exist

[@HeduAI]

My little spherical mind is filled with wonder, thanks to this awesome animation!!

[@arisu1311]

the sphere 's smile at the end , made my day , made me so happy , wow

[@jupiterstevens-hill7331]

Wait, if two dimensional objects are flat, and everything has height, even at a molecular level, does that mean nothing is truly two dimensional?

[@tennicktenstyl]

yeah.

[@tennicktenstyl]

next time your teacher says to draw a two dimensional figure slap him in tbe face. with a chair or something.

[@robw6954]

Well in our dimension 2-D is impossible, but maybe 2 dimension really exists

[@LK-fq8qq]

+Bartosz Olszewski Does your dimension not have diversity in math teachers because mine does and now I don't know who to slap with my chair :( *Insert social justice warrior attacking people who don't use nutral terms*

[@tennicktenstyl]

Leif Knox your racist

[@annadoesroblox6205]

“Wondering what all the fuss is about” ok then you try imagining a fifth dimension.

[@Ambersworstenemy]

same with the fifth dimension try imaging a sixth dimension

[@Ambersworstenemy]

and the cycle goes on and on and on

[@Yoyozlitt20]

@gg could you please explain how does that even work? I thirst for your knowledge

[@user-tl6lo9fl7w]

LOL

[@paul2019.]

Which direction is the fifth dimension?

[@hridaydesai7751]

this is the 9th video i’ve seen in a row these videos are too addictive to not binge :)

[@SHAFIulBARI]

Ted-ed's video quality is on a different dimension ❤️. Absolutely mind blowing

[@nermalmovement]

I love this story because first it’s told to us with dimensions that we can understand, and then makes us think about the fourth dimension. Whenever I try to just explain the fourth dimension to my friends, they always get confused, but now I know to first talk about the third dimension compared to the second.

[@AnthonyChannel13]

Excuse me while I go have an existential crisis.

[@user-rd3jw7pv7i]

why is this me

[@will9788]

Same

[@BagelBrain]

AnthonyChannel Funny and original

[@ultimaxkom8728]

Congrat x)

[@obsidironpumicia4074]

Well yes, but it's a _good_ existential crisis! Fourth dimensional friends!

[@kabbo_mtr]

Best ted ed video by far. The ending was beautiful

[@mageshgopi3594]

Kudos to the Animation team for this wonderful eye-candy

[@jaapheslenfeld7365]

The only reason why hyperspace is important to us, is because physics gets easier in higher dimensions. The famous mathematician Riemann tried to explain all nature’s fundamental forces by adding more dimensions to our current dimension. He said that a force like gravity is just a ripple in 3 dimensional space and is caused by gravity in a higher dimensional world/universe. With his number theory he could describe every object in higher dimensions (unlike Euclidean theory which could only describe objects in a 2 dimensional world, with things like the number pi. However Euclidean theory was incorrect for the real world, because our universe has 3 dimensions. This is why there had to come a new theory about geometry which ultimately led to Riemann’s number theory). Centuries later Riemann’s number theory is now used in string theory, because according to this theory a force is just an consequence from the bending of a dimension. Now string theory tries to explain all the fundamental forces of nature (the nuclear forces, the electromagnetic force and gravity) in higher dimensions (10 dimensions to be precisely). So string theory is based on Riemann’s number theory, because the physics gets easier to understand in higher dimensions and maybe we can find the ultimate grand unified theory of nature with it. When we know what it’s final mathematics then are, we can calculate how much energy it will costs to create and open a wormhole (which we could use to escape our universes, when our own universe dies in the far future). That’s why you could say that such a grand unified theory really is a theory of Creation, because such high temperatures were only reached in our universes when the big bang took place and our own universe formed. When we have reached the temperatures needed to open a wormhole, a new universe is born and we could escape our own universe trough that same wormhole. If we want to survive than we have to escape in hyperspace in the end.

[@VillegasCar]

But probably we will never see a higher dimension than our 3D universe. It will only stay as math on paper

[@Tiago_C]

I say you are watching too many science fiction movies

[@DieTryingK]

Ok you started off great but turned a bit OTT towards the end. I highly doubt it would ever be possible for humans to travel using a "wormhole" if it were even possible for us to manually create one, we would die. This is nature remember, to say we can create wormholes would say we are god

[@srend5510]

u forgot hermann grassman

[@kurotrash4940]

Stop being r/iamsmart

[@toadstar1004]

A line is made of 2 points. A square is made of 4 lines. A cube is made of 6 squares. So a hypercube is made of 8 cubes?

[@naimbensaed]

+ToadStar100 No cause, the hypercube it still got just lenght, height and direction, three values so it's still being a 3 dimension object, it's impossible for our mind to think about a 4 dimension object unless we see it.

[@DweebsUnited]

+Naim Bensaed Zian Thats not true, no. As per the demo in the video, you have to stretch the cube in a 4th dimension, giving it more than just length, height, and width. You are correct though that it is extremely hard to comprehend without seeing it, which is impossible with our senses.

[@toadstar1004]

Eric "Ozzy" Osburn Well, yeah, I haven't got a clue of what the 4th dimension would look like.

[@KrazyPlonk]

+ToadStar100 I saw a video (I think it was Matt Parker's Royal Institution talk) which showed the 3D net of a 4D hypercube. It was 8 cubes. I think there were 4 on top of each other and then 4 around a single cube.

[@TheDungeonMasterz]

+ToadStar100 Nobody does, thats the nature of it. It is mentally and physically impossible to know what it looks like. Its super annoying I know. I have been interested in 4 dimension theory for several years now and I have read a number of books looking for an explanation. The unfortunate fact is we can only understand the 4th dimension through mathematics. We cannot visualize it. It sucks.

[@mrdude4638]

Damn... That was wholesome.

[@danielhaqim5284]

the animation is mind blowing, knowing that this video is 8 years old even blow our mind once again

[@jonni2734]

Just WOOOOW, I really love the thought that 4D creatures could occasionally enter our 3D world!! Awesome video!!!!

[@stampzplayz6767]

John Brighton dafuq

[@talkingcontroller9396]

jonni2 like angels and demons in movies boi!!! What if they are really creatures from another dimension O.O

[@ArmyRangerSJ]

@John Brighton God. Think about it......

[@UltraEgoMc]

But 4d isn't even real though.

[@icompletelyandwholehearted9551]

SBP Saga_ ErubPub Thats what the other 2 dimensional shapes said too

[@evelinastankeviciute2678]

It's like more intelligent creatures can't understand even more intelligent creatures, but can understand less intelligent creatures than them.

[@evelinastankeviciute2678]

But can't understand how the less intelligent can't understand them and how to explain it to them.

[@evelinastankeviciute2678]

Lol, idk

[@damiangudina]

+Evelina Stankevičiūtė yes!!! you are absolutely right. good way of thinking

[@RealLifeKyurem]

Yeah, like how people cannot describe or explain what "green" is to a person who is color blind to green... Colors and other sensory perceptions are molded by the the "data" the brain processed from the inputs the sensors received from the outside world, I wonder how we, humans, a three dimensional species, can somehow perceive higher dimensions with our three dimensional mind. I am not talking about the hypercubes, or 4-spheres (4 dimensional spheres) that mathematicians (geometrists? Like how "geologists" are from "geology + -ist + -s") have come up with. I think those are more of "approximations" of the 4-D figure, like how we approximate a 3-D figure on a paper...

[@tennicktenstyl]

you are getting too philosophical here, calm down.

[@grantic5413]

0:12 that looks like amogus

[@cosmicdot.]

Sus

[@zondor8123]

Imagine some aliens take you and enhance your eyes / body to be able to perceive 4d world. When you came back, you literally a walking deity

[@atrophos4104]

“BRING ME THE GODS I’M DESTINED TO DESTROY!!!”

[@user-ib1dx4dh3n]

@Dat Boi you still could Since perceiving two dimensional lines is still possible In a three dimensional world

[@alephnull6785]

This plot is good for anime or for movies

[@helpme7704]

The music is like I think it was called “Thomas was alone” really good game.

[@MarauderYT]

Severely underrated, too. It’s been 3 years since I last touched that game and this is the first reference I’ve seen to it since then.

[@helpme7704]

Marauder G Realy? Dang.... Did you play the eleventh chapter?

[@MarauderYT]

@@helpme7704 I completed EVERY chapter. From the very first all the way to the final level of the Benjamin's Journey DLC

[@helpme7704]

Marauder G cool!

[@ishworshrestha3559]

Ok

[@tachyontech]

Seriously the best presentation I have seen over the ascending dimensions. Well done.

[@pavankharche7014]

Literally gives me goosebumps.

[@ss-qv6ch]

thing is we can't even comprehend the second dimension because we always perceive 2D things to be extremely thin, but not without height

[@motivationandinnovationpro7788]

We can't see a 4th dimension substance same with that a 2D can't see a 3d object. So, we can't say that we are the only living beings in this whole universe.

[@aqua8584]

Of course. There's animals and bugs and plants and the whole shebang

[@UltraEgoMc]

You are acting as if this is real. LMAO

[@Pepino8A]

There are bugs? *Starts the Debugger*

[@GewelReal]

But those dimensions don't really exist

[@Marco-zt2jj]

@@Tom-id7zr just if it passes through their world. The fact that we just see 3 dimensions means that we can just see a tiny fraction of our universe. The past and the future are an example of this, we can't see them no matter what because we can't move through the 4th dimension

[@AmNeSiAPvP]

Everything that's ever happened in your life up to this point has lead to you reading these comments and stopping on mine in particular, you can do great things with your life, that's why it was given to you as an experience. Be kind, save a life . Pay it forward!

[@cybr69lol]

theres just something beautiful and adorable about this video that makes me want to watch it from time to time

[@teshunhao5131]

Amazing animation, truly amazing

[@SkepticalChris]

This video is not just about dimensions and mathematics, its about a bigger question, in that what is out there? We are very comfortable in our relatively limited way of thinking but if we open our mind to more possibilities, and that the unknown could be known if we are able to look outwards a bit more. Curiosity is not a crime, its the first step to knowledge.

[@marvink.9369]

So, where can I find a 2 dimensional being?

[@Leotique]

+Marvin K. cartoons...

[@marvink.9369]

In reality?

[@Leotique]

Marvin K. pictures :)

[@marvink.9369]

living 2D creatures?

[@Leotique]

life forms ? :) i don't know..sorry :)

[@christianmarroquin4613]

I love the background music. Is it available anywhere?

[@twangerrrrrr]

when the sphere said "its 3D-ing time" to the square and 3D'd over the second dimension. Truly one of the 3D moments of all time.

[@Azoth86730]

"Carbon stars with ancient satellites colonized by sentient fungi. Gas giants inhabited by vast meteorological intelligences. Worlds stretched thin across the membranes where [the] dimensions intersect... Impossible to describe with our limited vocabulary!" -Dr. Breen

[@cheeseburgermonkey7104]

*minding my own business* *a hypersphere grows* me: is that... A 4 DIMENSIONAL SHAPE?! *now it shrinks and disappears* me: wow

[@ultim8yeetr708]

Me, as a octahedron: boi have u seen dat 4d games video?

[@WakeUpCall93]

Great Animation.. Love How They Explain Great.

[@kidtoucher_4469]

The music made me happy and sad at the sane time :)

[@DonnaBrooks]

The ending of this was surprisingly lovely, even touching.

[@neon3.641]

This explained interstellar to me

[@nancyjoseph9962]

Must Apriciate the presentation!

[@sayanmazumder1914]

The one and only best explanation about dimensions for me.

[@lunavenus7082]

This made me cry....

[@alinasovane4341]

+Luna Venus I am glad I am not the only one :)

[@rishitachakraborty9783]

I love this concept! Just like the 2D people couldn't see 3D around because of their perception, maybe 4D and even higher dimensions are all around us but we can't see them with our 3D eyes. Maybe it's right in front of our eyes, hidden amidst the floating dust particles.

[@kashutosh9132]

But then the question arise - where are those 2d organisms?

[@Mabbdaa]

@@kashutosh9132bacteria, plant cells, are essentially 2 dimensional.

[@kashutosh9132]

@@Mabbdaa No They too have thickness(height) - to they are 3d as well

[@khaoulakhaoula5256]

This is reality actually

[@lovely-yj6zy]

I like the music! Because of this, I am seeing this video a dozen times.

[@anthonyv8634]

This is by far my favorite ted Ed video

[@popkrull9905]

I wish a hypersphere would pick me up and show me their world ;(.

[@enderstar5017]

Then maybe President Sphere would try and kill you for trying to preach the gospel of 4 dimensions. (Only people who have actually watched Flatland the movie will get this)

[@Multibe150]

+// Popkrull // You are a square.

[@nUrnxvmhTEuU]

I haven't met a 4-sphere yet but at least you can play with a little tesseract wishing to reach the fifth dimension :) michal.grno.cz/4d/

[@Stickycomix]

+Michal Grňo I like this. Thank you.

[@jamrose6322]

// Popkrull // then you realised it's nothing special.

[@ultra_ultra]

Music from 'Thomas was alone' ?

[@TruthfulOctopus]

Yeahhh, I recognised it straight away

[@Xavi1437]

Bummer that the authors didn't acknowledge it, specially if we consider that T.W.A. is about a 2D world. (edited spelling)

[@Xhiblic]

Sounds a lot like Terraria too.

[@WestonBMusic]

Xavi _ What about the game Fez? That game's about a 2d world turning into a 3d world.

[@HerigLeBarbu]

Ha ha, exactly!

[@adm2267]

This is so insanely intresting....it really blew off my little spherical mind...

[@SHAFIulBARI]

I love the background music so much, it blows my 3-dimensional mind!

[@otabekbadritdinov6895]

I love Ted-ed. It is the best channel on KZbin. Thank you Ted-ed for your lessons. I know it's difficult to create such animations and find information and tell about it in a nutshell. Great job!

[@Jaylio]

All we have to do is observe flat earthers to see what it feels like living in another dimension

[@danielavanilla4331]

😂😂😂

[@bhargavimadineni7479]

This is what im looking for. Wow its simple and beautifully understandable

[@ravengenavia1933]

This animations, sounds, and narriations rlly opens up my imagimation and amaze me, like of you agree