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From: eternal888B
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  • So we have to look at shadows of the fourth dimension. We have equations and shadows but nothing concrete to physically see the fourth dimension for all we know we could live in an extremely tangled one dimensional world. For example a ball of yarn. Imagine the yarn as one dimensional its so wrapped up it creates a three dimensional sphere. We may never know but there is a strong chance there are other dimensions

  • have to comprehend the you can only see on the dimension below yours. As we can only see in two dimensions the "flat landers" can only see in one dimension. They can only see forwards backwards left and right (x,y). We can experience the up and down directions as well as the others (x,y,z). In the fourth dimension you can experience up down left right forward backward ana and kata (x,y,z,w) each axis perpindicular to one another. It's impossible to imagine something you've never seen and can't

  • I always understood four dimensional space in my own way, but Sagan has such a great way of putting it into words.

  • Came here because I listen to TesseracT. Stayed because Sagan is a bauss.

  • @edthehead83 story of my life

  • The people commenting are fucking stupid. OBVIOUSLY hes using the idea of a 2 dimensional world only to simply illustrate how the curvature of space is complex and may hold the keys to dimensions higher than the third which we simply cannot see because of the plane we live in and know so well. Be openminded and stop putting yourself in a box academically.

  • @Highcon Funny, in a sense, for Flatlanders like Abbot T. Square, you still have to glimpse a portion of the 3rd dimension to see your fellow flat landers (I read a short part of it in a Childcraft volume, Mathemagics, when I was a kid). Or is it I am so freed by living in 3 dimensions that I can't imagine a 2 dimensional world? Or is it, that, for three dimensions to exist, a fourth has to be present and so on and so forth (no pun intended)?

  • @shaider1982 Ahh but thats just the thing. If the flatlanders need to see a portion of the 3rd dimen. to actually see eachother, then they would, for all intents and purposes, BE living in the 3rd dimension and not the 2nd, no? The idea he illustrates is conceptual and assumes that the flatlanders CAN see eachother in the second dimension, tho it would be physically impossible in reality. He uses this hypothetical situation to illustrate the grand illusion a higher dimension may be entertaining

  • @Highcon I guess. Thanks;)

  • @instant000 oviously light could not travel in suh a way in flatland but hes just trying to build up to better explain what a fourth dimension might look like

  • 18 dislikes...fuck you.

  • @TheForthAngel 18 Flatlanders?

  • He makes a good point. It was way confusing the first watch

  • This man is very comprehensive

  • so this square is the only creature with the home?! All those poor homeless shapes!

  • @deathservent1 Well he was a square in school, i think he got a decent job after that

  • The apple is an asshole.

  • @SupernautG Hahahaha

  • @SupernautG I think you solved the 4th dimension - description, categorization!

  • @SupernautG hold your tongue ans say apple

  • carl sagan and martha stewart speak like pompous asses

  • This is just what describing one extra dimention would be like, now imagine several extra spatial dimentions, then 10 or 20 spatial dimentions, then a trillion or so spatial dimentions, a nonillion, 10^174, 10^35^493^9647 or whatever, really imagine the perspective between side by side dimentions and the vastness and possible horizon problems of orders of magnetude dimentions, then the possibilities become truly interesting.

  • @RJL738 They get even more incomprehensible when you allow for multiple time dimensions. I think my brain just fused.

  • Unfortunately, I think my girlfriend is from Flatland.

  • this is cool but did you actually record your tv screen that's a little heebed since i actually bought the dvd collection... but really at least you have good taste and took the time to do this...

  • CARL SAGAN THE LEGEND <3

  • The reason we can't see the 4th dimension is the same reason the flatlanders can't see up or down. Am I getting this right?

  • @Darkrunner1975 Yes you are.

  • subjective consciousness and alternative dimensions aside, Carl Sagan is fucking great.

  • Holy fuck, that guy is my Idol. He's the man of men. He, my friends.... Knows his shit.

  • Sagan's ability to explain higher concepts was marvelous.

  • Carl Sagan created the matrix. This explains everything

  • not only mr smith from matrix, but when Hugo Weaving interpreted V from V for Vendetta uses a very similar way of talking

  • @nachoseg Hugo Weaving will play Captain America's enemy "The Red Skull" who is trying to build a Tesseract device aka "Cosmic Cube" in the upcoming movie.

  • @SupernautG The synchronicities of this world are amazing sometimes.

  • @FluffyBunniesOnFire Ain't it the truth!

  • Confirmed Carl Sagan was an agent

  • Great explanation, thankyou. I never thought of a tessaract as a shadow of a four dimensional cube in 3 dimension space; very useful explanation.

  • flat land,good book lol

  • Ah, this reminds me of good times in To The Moon. I have recently revived my obsession with tesseracts, wormholes, and the like and I'm really happy someone posted this clip of Carl. Thanks you so much! *sigh* Oh well : ) *dashes off to watch Cube 2 again* XDD

  • Whoa, Carl Sagan is awesome.

  • So a creature from the 4th dimension can pop in on us, observe us? Then that would imply we could observe 2d 'creatures/entities'? Then what would be a good example of such a creature??

  • He coulda just drawn it. He had a drafting paper right there. All u gotta do is draw a vertical line, an x over it, a hexagon with the other lines running through their corners, then another equally larger hex outside the first- ..& so on- ..& so on- ..& so on- ..easy.

    He sed something about distorted representation being the penalty of manifesting in a lower dimension too- ..that explains a lot when it comes to spectral & other paranormalities.

  • er im still confused. cant imagine the 4th dimension =(

  • @thegoonist naturally, we can't. we think in the dimensions we live in, and we can't think in anymore dimensions than that. as i said, visualizing the fourth dimension is just not possible for us. there was actually some vague philosophy or something around the 1870s(give or take several decades, haha) focused purely on imagining what this tesseract is supposed to be like. they'd sit around a table just trying to think of this form in the belief it would somehow lead to enlightenment.

  • @Vinco thanks

  • @thegoonist i probably threw in too much unnecessary info haha, but uhm you're welcome.

  • @thegoonist no one can it is impossible....

  • @thegoonist No one really can. How can we imagine something that's never been observed. It's still fun to try, though.

  • @Dennygieck If you read anything by stephen hawking, he explains why using a positivist approach. Basically, life evolved according to the dimensions that exist right now. A 2d animal in our 3d universe would simple not evolve, and that is the reason they dont exist in this universe.

  • It's amazing to think that out in the Universe, there are 7 other spatial dimensions and axes out there that we can't begin to understand, because we're trapped on x, y, and z.

  • @foolonthehillz as far as i'm aware of it, there's only four spatial dimensions. the other six just shrunk into somewhere else after the big bang, beyond any sort of possible study or observation.

  • @Vinco i was reading hawkings universe in a nutshell. apparently the scale that the additional dimensions shrunk to is a specific size predicted by string theory.

    hawking comments that it would be theoretically possible to probe on this scale directly, but it would require a particle accelerator bigger than the solar system. pah!

  • @rrrickflair ah. okay. but bigger than the solar system? daaaamn lol.

  • He is the best science teacher ever.

  • See. Drake equation vid. EPIC

  • The Tesseract uses 0,0,0,0 but CubicWonder shows how you can get up to

    eleven dimensions using 0,0,0 xyz coordinates why did you not shoot it down.

    Paul

  • this man is giving credit to things he doesnt even realize or make obvious that he is aware of...if that makes sense...but he is proving that ghost are real...in a sense..if that makes sense. he is also proving that i just saved 15 percent on car insurance by switching to gieco.

  • @Drooozyem bahahaha

  • so ...this means...if your mom is a 4d creature and gets mad at you and yells "you better clean your room or ill knock you into last week!!" she could realy do it O.O

  • with this video i started to understand the so called tesseract what could be!...it´s said that the 4th dimension is the time, so the tesseract is the projection of a cube through the time, all depending to wich direction is projected, in this case the projection refers to all places, as far we can understand it we see it like increasing it´s size, isn´t it amazing¡? so if we could see through 4th dimension maybe we would be able to see the time of anything in the 3th dimension,

  • @manonpiano

    You could think of it like that. This video is talking about the fourth physical dimension, but from what I can tell that's the same thing as time by some people's theories, but not all.

    Imagine the whole universe as a four dimensional shape that we're just moving through in three dimensions....hmm...that's an interesting thought...

  • Truly amazing and very convincing, at the same time to further prove his point when the poor prophets say "something" is inspiring to us that He exists and He created this universe most of us say that they are crazy and delusional. What an irony that Carl Sagan himself is explaining that. I think he is having real fun in the forth dimension now.

  • if the objects in flatland have absolutely no height at all then wouldnt they be invisible to other flat landers? dont you need to be in 3 dimensions to actually see 2 dimensional objects? i could be wrong

  • @bZberetta I agree. My theory is that those flat landers would communicate with each other through sounds. They have no volume at all but area. Think of them as light projected onto a flat screen. It would be so easy for them to crash into each other because they would not be able to see each other.

  • @astronivo20XX

    Actually they can see each other, but only one-dimensionally.

    Think about it, we can only see things in our 3 dimensional space, in 2 dimensions, a plane, like a photo.

    A two dimensional flatlander would be able to see everything in one dimension. If a rectangle was rotating, a flatlander would see a line growing and shrinking. Like this, we see a rectangular prism spinning as a rectangle growing and shrinking. We're just used to this, and so perceive a prism

    Cmmnts r 2 shrt >=(

  • two questions, would the net of a four dimensional shape be three dimensional, and would the shadow be three dimensional as well?

  • @dooshtoomun Yes! The net of a tesseract is typically cubes arranged like a 3D cross. Put a cube on each side of a center cube, then add one more to the side of any of the 6 outer cubes. Then fold them together in your mind.

  • @FluffyBunniesOnFire cool! what about the shadow? because he said that thing he held up was the shadow

  • @dooshtoomun Shadow is just layman for coordinate projection. An object can be projected into any lower dimension. The simplest kind is to just throw away one or more of the coordinates (e.g. (x,y,z)->(x,y)). The "cube in cube" is a perspective projection, where the "inner cube" looks smaller because it is really the "far side" of the original form. Zany!

  • carl sagan is doing just fine in another life on another world, but we miss him here on earth

  • Carl Sagan. R.I.P.

  • i want to see the 4th diminution :(

  • Me encantaría que alguien lo resuviera en español, mi ingles es malo... entiendo pocas palabras..

  • So... a 4D being could very well look inside our closed 3D houses with no problems at all. Scary :P.

  • MoskowFreak1111 is right. How is it possible for flatman to perceive his surroundings at all if none of the 2D things around him really are 2D and have no height. He should only perceive these things when he goes on his trip above and looks down.

  • Perception is different from seeing. what we define as seeing exists only in our own 3D world. however, it cannot be said that there isn't an analogous version of seeing in the 2D world, one that we cannot understand because of our own limitations in 3D.

    Perhaps beings in the 4D (if there are any) may say the same thing about us, since we wouldn't be able to conceive of the 4D world either. Yet for us, we clearly can perceive our surroundings.

  • Ruined a perfectly good apple :(

  • mind: blown

  • its just like the scene in flatland, i have to read that in geometry

  • how can the 2d guy see his house wall with no height?

  • creepy...

    extrange, 3d creature!

    A.K.A. Apple...

  • That man has a sexy voice.

  • this is just the ending of flat land, psshhhhh

  • hyper qooob!

  • close your eyes, this is Agent Smith from the Matrix.

  • i still don't get it. seems fake.

  • where's my bong?

  • 4D smoke weed every day

  • Is it just me or does he sound EXACTLY like Mr Smith from The Matrix?

  • Because the actor who played Mr Smith copied Carl Sagan's method of speaking for the character.

    So it would be better to say that Mr Smith sounds like Carl Sagan, rather than the other way around.

  • @darksean99

    I have been saying that Hugo Weaving sounded like Carl Sagan in the Matrix for years!!!! I feel so validated LOL.

  • @darksean99 why??

  • I'm assuming you've seen this video?

    /watch?v=BlpyGhABXRA

  • @richardmcguinness73

    i dont think so Mr. Anderrrsonnn !

  • @richardmcguinness73 i was just thinking that haha

  • @richardmcguinness73 Hahahahaha!!!!!!

  • @richardmcguinness73

    He likessss to prolong his SSSS's.

  • I'm so baked

  • UPVOTE REDDIT

  • SMOKE WEED EVERY DAY

  • @stfudonnie Yeah, smoking weed has obviously made you a lot smarter.

  • @TomekTQ

    Yeah, The internet has obviously made you a lot more of a judgmental prick. You don't know shit about that guy, he could be valedictorian at Oxford for all you know.

  • I don't need to know shit. He watched a video about 4-dimensional topology and all he could come up with was "SMOKE WEED EVERY DAY": somehow I don't think he's the sharpest knife in the kitchen.

  • @TomekTQ

    Allow me to introduce you to the concept of the "Internet Meme" you see it is commonplace internet humor to say "Smoke Weed Everyday!" In relation to Carl Sagan because he is an ironic example of a weedsmoker who was not only brilliant, but excelled academically. This is an old joke and has no bearing on the intelligence of the poster.

    You however have demonstrated a lack of humor and now you just look like a douchebag.

  • i love the way he speaks :]

  • Sup reddit.

  • Im a Reddit lurker. So HEY REDDIT!!!!

  • In 'Hyperspace' author Michio Kaku uses the same example. I think he's using Sagan's logic.

  • Do you think Michio Kaku is forced to learn everything over again? For that matter, every quantum physicist?

    Even Einstein had to learn from Newtons calculus. Lay off, scientists use each others logic all the time. No-one OWNs science.

  • Comment removed

  • He speaks like Agent Smith (or vice-versa)

  • Hey, reddit.

  • Waddup.

  • His explanation of this was taken and developed from the book Flatland (which was released in 1884). It's a great book.

  • was sagan, hugo weaving's inspiration for playing mr. smith in the matrix movies. the talk exactly enough

  • @mycartel ROFL, you're absolutely right. Mr. Smith

  • Carl Sagan does Play School?

  • If we have length x width x highth then what do scientists or mathmaticions call that fourth dimension variable? The next x something?

  • time

  • "Which oddly enough, looks like an apple..."

    "... he has gone Bonkers."

  • how do we know for sure these dimensions even exist? if we cant enter them, aren't they all hypothetical?

  • We don't "enter them" per se. We are alrady in multiple dimensions. We simply don't percieve them because of the nature of how we're made. Just like the 2d "person" isn't able to comprehend the 3D apple.

    So in our world, we percieve 3 dimensions. But more exist. Predicted by math and proven by einstein. Some say as many as 17 are REQUIRED if string theory is true. That's deosn't mean it necessarily stops there.

  • ohh i get it now, thanks =]

  • @Nash1a You are wrong, according to Einsteins therories there are only 3 dimensions of room and then there are time.

  • Some can be mathmatically calculated.

  • If you want to see the 4th dimension fill your lungs with salvia.

  • finite and unboundedd. or is it infinite and bounded.

  • hmm so can complete sound waves travel inter-dimensionally? Or would he only get the little bits that passed through his flat world?

  • IMHO Dr. Sagan's greatest contribution was his desire to make quantum mechanics and theory understandable to the masses.

  • silly triangles, with their three sides.

  • is it possible to be computer generated?

  • Yes but even with the ebst of 3D rendering you would only be able to see it from one side, there for it would look like a spinning web of squares inside of a dimensional square frame, an example can be here.

    watch?v=5xN4DxdiFrs

  • This guys i amazing! I wish he was my science teacher... just the way he explains everything makes total sense...

  • Comment removed

  • No they wouldn't.

  • @bma1986 if you say a 2dimension object doesnt exist then why should a 3dimension object exist?

  • If he would have been my science teacher I would have never cut that class.

  • wooooooooooooooooooooooooooooo­ooooaaaaaaaaaaaaaaaaaaaaaaaaaa­aaaaaaaaaaaaaaaaaaaaaaaaaaaaaa­aaaaaaaaaaaaaaaaaaaaaaaaaaaaaa­aaoaoaoaoaoaoaoaoaoaoaaoaoaoao­aoaoaoaoaoaoaoaoaoaoaoaoaoaoao­aoaoaoaoaoaaoaoaoAQOAOAOaoazlo­AQOAZOAOLAOAOoO

  • He'd be the best science teacher ever

  • @gouriglaguen He WAS the best science teacher ...ever.

  • @gouriglaguen Carl Sagan IS the best science teacher ever. He taught the whole world, not a classroom of children.

  • there is better versions of this on youtube

  • @omgrapist this is youtube -_-

  • then try looking for them here, you fuckin dolt

  • i found this and it is very informative

  • So the Apple is Jesus ?

  • Yes, you're right... But what think Microsoft about..?

  • We live in a flat land.... Mr. Anderson..

  • Haha, good parallel!

  • He is fantastic and amazed funny! Existing version of Doctor Who XD

  • @Astroni800 - now you're takling.

    tardis materialises 2010 and Sagan steps out

  • Yes, it's possible... ;)

  • this guy is both a genius, and a lunatic! haha

  • gahhhhhhhh :L hurts my 3rd dimension brain

  • He can understand it perfectly well. Can you?

  • Actually he sounds like Agent Smith from The Matrix

  • what's underneath flatland?

  • The Flat Devil...

  • flat-hell haha

  • You don't really get the concept of flatland do you? It's totally flat. there is no underneath or above.

  • @omniScientifique Well of course there is, the only problem is that the residents don't know about it. We on the other hand know that there are infinite planes parallel to flatland, such as there are infinite 3rd dimensions parallel to ours that comprise the 4th dimension.

  • imagine that there is another flatland beneath it. Then they can be considered as parallel worlds. This is awesome.