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Spoiler warning for Attack on Titan. *crashing and punches* Eren! Try a Snickers! You’re not you when you’re hungry. Grab a Snickers. Hello Internet, welcome to Film Theory. The only show to recognize that the best way to stop a skyscraper-tall Titan isn’t building a stronger wall, It’s lining the outside of the city with LEGOs. Look at those bare feet, LEGOs are gonna be more effective than a spike pit. Anyway, as you can tell, today I’m taking another look at everyone’s favorite action horror anime, Attack on Titan. Now if you’re unfamiliar, check out the last video that we did about it or quite frankly, just watch the series. If you’re new to anime and overwhelmed by which shows you should be aware of, this is definitely one of them. It’s one of those franchises that’ll just remain a must watch anime for years to come, kinda like Death Note and Full Metal Alchemist. Anyway, to give you the three sentence rundown, for 100 years, all of humanity has been living in fear, locked in cities protected by towering stone walls designed to keep out the man-eating giants known as Titans. One boy, named Eren Jeager, becomes a soldier and years later discovers that he has the ability to turn into a Titan at will. With Eren’s new power, humanity finally has a fighting chance against their ancient enemy, but reclaiming the world will still be a uphill battle. Especially when you consider that Eren tends to get kidnapped more often than Princess Peach. Now it’ll come as no surprise that the biggest reason I love watching Attack is that it’s packed to bursting with unsolved mysteries. Mysteries is like what the heck was in Eren’s basement? Why the heck would the Colossal Titan knock down the wall in the first place? And how long will this newly-introduced character last before – oh, wait, never mind, they just died. But there’s been one question that’s been hanging over the series since the very beginning. One that is the single biggest driving mystery of the entire plot. What exactly are the Titans? Where did they come from? Now I see you running down to the comments to shout, “TITANS ARE PEOPLE!” and yeah, I am very well aware that at the core of every Titan there’s a human nervous system piloting it. It’s like some kind of horrifying zombie fleshman. But that doesn’t tell us what they’re made out of. What their origin is. Because while the human body can do some amazing things, one thing I’m pretty sure it can’t do is suddenly grow to 20 times its size. At least not on its own. The laws of physics are pret-ty clear about that one. You can’t just create matter from nothing. So when Eren (and the other humans) transform into Titans, all of that instant Titan has to come from somewhere. Something has got to be making that happen, and by analyzing the physical characteristics of the Titans, we can figure out exactly what it is. Solving the show’s single biggest mystery before it’s ever revealed. Now the most obviously unusual trait for the Titan is, of course, they’re freaky faces. But right after that, the thing that stands out most about them is their size. Excluding Abnormal Titans like the Colossal Titan and the Beast Titan from Season 2, Titans range in height from 4 meters to a whopping 15 meters tall (or about 13 to 50 feet). That is pretty darn enormous. “How big did you get? 21 feet. 65.” Stop bragging about yourself Ant-Man. We heard you the first time. Or at least those of you who watched my recent theory about Ant-Man and the Wasp heard it. And if you did, you’ll remember that, due to the square-cube law, increasing a human body’s size by that scale dramatically changes the ratio between its weight and effective strength, making it much harder for the body to move and support itself. That’s why at 60 feet tall, Scott Lang’s movements have to be so much slower and more careful. His body is supporting much more weight than it’s designed to. And since Titans have bone structures that are very similar to humans, you would expect them to be a lot slower than the humans fighting them But that’s not actually the case. In the anime, we frequently see Titans running towards their human prey and picking them up with the precision and agility of a regular-sized human. Even at a full 15 meters tall Eren’s Titan form is capable of breaking into a sprint and using hand-to-hand combat techniques made for a human a tenth of his size. The reason for this is explained in Episode 15 by Hange Zoe, the show’s resident Titan expert. (and apparently digi-destined, if those goggles are any indication) “I’d kicked the severed head of a three meter Titan out of spite, It weighed next to nothing, contrary to the appearance of density and great mass The severed limbs were the lightest tree-bark.” Despite gaining a lot of volume when they transform, Titans don’t gain an equivalent amount of mass. They’re lighter than they should be, which both explains how they can move so quickly and points towards an interesting conclusion. When Titans transform, some matter is being added to their bodies, but what’s there is also expanding, like a balloon or a loaf of bread rising in the oven That’s the only way they could be increasing in size without also increasing proportionally in weight. And as strange as it sounds, the bread comparison might not be that far off. The thing that causes bread to rise is yeast. A single-celled fungus that to put it very simply eats sugar. “Eating sugar?” “No papa.” “Telling lies?” “YES. YES.” And then poops out alcohol and carbon dioxide through a process called fermentation. This trait makes yeast invaluable in the production of beer and wine and has made it a vital component in baking for thousands of years The gases created by yeast create pockets of air inside of bread dough that causes it to rise and gives the final baked good a light fluffy texture (or at least that’s what I’ve learned from binging five seasons worth of the Great British baking show). And yeast is also what’s caused the Titan epidemic in the anime. You heard that right. The true villain and Attack on Titan is a bread leavening agent. Bread is Titans! And Titans are people! So-. Oh god, we need to stop Sasha before she kills again! If you think that theory sounds like a stretch well good because that’s how you activate yeast But seriously the yeast theory accounts for some oddly specific querts of the physiology of Titans. Firstly, Titans are hot. And now I’m not talking about the Female Titan’s exposed muscle look that leaves almost nothing to the imagination. Get your minds out of the gutter! I mean that the Titan bodies give off an insane amount of heat (and the bigger they are the hotter they tend to be). While regular Titans are hot to the touch, the Colossal Titan can cook anyone trying to attack him with a burst of hot steam. And the Massive Titan that Rod just transformed into in the anime is so hot that trees burst into flame just from being near him. Now look at yeast. As yeast ferments, it gives off heat. It’s an exothermic reaction. If the fermentation process speeds up or more alcohol is being produced, that temperature rises. Bigger sizes, faster growth, more HEAT. With bigger Titans, the fermentation would be happening at such great volumes and speeds that the resulting heat would cook the air around them. We can see clear evidence of this whenever a Titan is wounded or dies. As their skin breaks down and decomposes massive amounts of gas are released all at once, sometimes with enough force to blow away the soldiers trying to fight them. This gas would be the CO2 that’s being produced by the yeast and that’s keeping the Titan bodies inflated. And then there’s the way that Titans take in energy. Despite having a hankering for human flesh that rivals my own cravings for Diet Coke, Titans don’t actually need to eat humans for sustenance. I mean, consider this – they were able to keep moving around outside the walls for a hundred years, but only a few unlucky Survey Corps members to snack on. Nope. Their fuel isn’t humans. The only thing that Titans actually need to keep their insanely huge bodies moving is sunlight. In Episode 15, Hange proves this by covering our two captive Titans, Sunny and Bean, with tarps, causing them to stop moving entirely in just a matter of hours. And the Titans discovered inside the walls after Eren and Annie’s wrestling match at the end of Season 1 are also shown to be completely immobile due to a lack of sunlight. You know what else draws energy from sunlight? Yeast. When exposed to ultraviolet radiation from the Sun or other sources, yeast becomes more active, growing, reproducing, and fermenting at a faster rate than normal. If that fermentation is truly the source of the Titans energy, that would explain why cutting them off of sunlight causes them to slow down and eventually stop moving. So ladies and gentlemen, what we have here is a classic case of yeast infection. Okay, so maybe not your ‘classic’ yeast infection. And we’re obviously not just talking about normal yeast. I mean, FatPat here eats a lot of bread and not once has it inspired a global crisis. Just a waistline crisis. Which merits the question: is yeast just an inspiration for Titan behavior? Or is it truly the cause of what we’re seeing in the anime? Is there any sort of evidence that the Attack on Titan universe would have some sort of special yeast that could produce these sorts of effects? Yes. Yes, there is. It’s subtle, (certainly subtle enough that most viewers would probably overlook it) but it is absolutely there. In the publicly available information bonus sections from the manga (which are then repurposed as commercial break eye caches for the anime) There’s an entire page dedicated to a unique type of yeast produced behind Wall Sina. Reading both anime and manga descriptions of it, we learned that this special yeast doesn’t come as a powder. It looks like a lump of fermented soybeans the size of a human head. What’s more, storing it with wheat, soybeans, or cured meat slows down the decomposition process, transforming the food by some means not yet explained by science. This preservation ability provided through the yeast allows for supplies to be stockpiled for future use by forces fighting to take back the walls. And, while that might not seem suspicious at first every other one of these pages is either directly relevant to the current storyline or provides vital world building details, covering topics like characters, battle gear, details about the walls, the history of Titan attacks, Etc. And only 14 of these sorts of pages are included in the original manga These aren’t throwaway details. Each and every one of these pages is something that the manga’s writers felt that you needed to know. So it’s strange at the very least to think that we need to know this weird little detail about fantasy-world food preservation, unless it isn’t really about the food preservation at all. You know, there’s one other place in the Attack on Titan universe where we see that kind of unnatural preservation ability: in the bodies of the Titans themselves. When we find out Ymir’s backstory in Episode 35, we see her turned into a Titan as punishment for leading a cult (and being forced to spend decades out in the wilderness). Eventually, she gets completely buried in the dirt before Bertholdt, Annie, and Reiner stumble up on top of her. But when she transforms back into a human, she somehow hasn’t aged a day. Something within her Titan body preserved her perfectly for all of those years. In general, there’s something preventing the bodies and minds of the human hosts from aging or decaying for years inside their transformed states. And the only thing we know with that property (which also conveniently would explain the Titans’ light weight to gassiness and their solar-powered physiology) is Wall Sina’s miraculous Giant-sized yeast. So the next time you’re baking bread just make sure you eat it before it eats you. But hey, that’s just a theory. A Film Theory. AND CUT

100 thoughts on “Film Theory: Attack on Titan’s Biggest Mystery SOLVED

  1. Woah! I just noticed something… 3:54, the titan corpse has 18-20 ribs. The human body has 24…

  2. I had a theory that all Titans were people but you were also saying that, so was there something that I missed and you proved that, cause I was giving up on my theory

  3. see, i would love to know the truth.. but this is SO far off.. its disturbing me (no hate) (love ya matpat) (your the best ever) (i know your trying) (keep up the – hOneSt- wait ***read the manga***)

  4. I'm not a big fan of anime. But I've seen Death Note a couple times, loved it, watched seasons 1 and 2 of Tokyo Ghoul (loved S1), but I actually still watch Attack on Titan. It's like. The only anime I bother keeping up with.

  5. The female titan is a teen boys dream and for you ladys we have the rouge titan 😂😂😂 #lol

  6. You were basically right I came back to say this after watching season 3 part 2 of attack on titan and you are smart

  7. Basically what I got from this that sorta made sense is…

    Titans = Walking loaves of bread. Giant walking loaves of bread.

  8. I almost wonder if this may have been one of those things the mangaka changed after it got popular.

  9. How do they have such strength and be so light?
    I mean, muscle is actually quite heavy due to how dense it is
    If they really were all that light then there's no way they could have destroyed that wall even with it's weakness
    Just a thoughtful question

  10. But MatPat, regular normal humans release carbon dioxide and need sunlight too. Also how would people be infected by the yeast? Eating bread? Wheat is needed to bake bread and it needs sunlight so could it not be argued that the wheat is what Titans are made of since wheat is also mentioned on the page about the yeast?

  11. I just thought of this
    Me: wait so….if they are like bread and yeast…..then does that mean they eat humans in the wall because…bread is mostly their only food so they eat it all the time brain explodes 🤯

  12. Okay, I know all the comments are things like "Manga readers laughing in the background" or "The season 3 finale kinda disproved this theory" or something to that effect. But is it strange to anyone else how much this theory makes sense when you lack omnipotent manga knowledge? I mean, the public disclosure screen about yeast IS a little strange when you look at it through this context.

  13. I’m surprised I just saw this. I love the series even tho I used to hate it. I stand by eren for some reason. But TvT it’s sad they are the lied too.

  14. Let me make your list of anime you should watch longer. Ahem

    Your lie in April

    One Piece

    One punch man




    Sao ( Sword Art Online)

    Sao2 (Sword Art Online 2)

    Gun Gale Online

    Black Butler

    Please comment if you want to add to my list of anime you should watch. ( ͡° ͜ʖ ͡°) Also some songs to keep my title as making the longest comments. I'm falling down into my shadow
    Failing to control my breath
    As I embrace the deadly night
    If you are scared, never show it in your eyes
    Near those pumpkin carriages
    ‘Cause all the witches see right through your lies
    See you in your dreams, yeah, baby
    I'll still be there if it's a nightmare
    Fairy blue, for you I'd steal the stars
    And lay them at our feet
    So we could own the night
    Black paper moon
    I will be the light, believe in me
    When you're lost, here I am
    Forever with your soul
    Look above ‘cause you belong up there
    Beside the shining moon
    A spell was cast, sweeter than the crimson jam
    Taste it and you get one wish
    So, wish for anything you'd like
    Your destiny, make it grand or horrible
    Grasp it with those hands of yours
    ‘Cause you can live your dreams while still awake
    Don't try to cast a spell on me
    You'll never win, you'll never break me
    Fairy blue, the reason I'm alive
    The reason I can breathe
    It's all because of you
    And I'll pull through
    If you reach for me and call my name
    I will find you my dear
    Wherever you may be
    Here and now I swear to break your curse
    And I will set you free
    It's true, without you, there were nights
    I told myself that I could live on in dusk and darkness
    But somehow you reached me
    It's your voice that calls to me when I fall
    You are my savior
    Fairy blue, for you I'd steal the stars
    And lay them at your feet
    So they could light a path to guide you home
    If you're ever lost and lose your way
    Look up, you'll be okay
    So wipe those tears away
    Fairy blue, the reason I'm alive
    The reason I can breathe
    Is ‘cause you are the key that sets me free
    So I swear you'll never be alone
    When you're lost, here I am
    Forever with your soul
    We can make it through, if you believe
    If you believe in me
    Paper moon by Amanda Lee
    Cloudy memories
    Of the way it used to be
    Search for answers I can't see
    Looking back in time
    All the images they tell me
    where I'm going
    They guide me
    Look to the skies
    it's a new day, every day
    Feeling so confused
    But I know your heart is true
    Please trust in me
    Flying so high up in the sky
    I'm caught up in a dream
    My fears they fade away
    It's my reality
    And now I know the reason why
    I've got to make a change
    Grow stronger every day
    I need you here with me
    I'm trapped in the dark
    but I'll never give in
    I gotta break free,
    escape this endless nightmare
    I won't stop
    Searching in the dark
    But I don't know where you are
    Won't you guide me
    I'm falling
    Tremble at your touch
    And I know I must return
    back to reality
    It's calling
    Close your eyes and just follow,
    you'll know
    Pleasure and the pain
    Come to haunt me once again
    Just trust in me
    Everything that
    we're dreaming of
    You make my life complete
    The smell of victory
    It's in the air I breathe
    I'll always be
    right by your side
    I do it all for you
    But nothing's as it seems
    I'm floating in a dream
    You gotta believe the power
    that we feel
    It comes from deep
    within our hearts a promise
    That we'll keep
    Open my eyes I try to speak
    I'm calling out your name
    God bless the miracle
    that brought you here to me
    Flying so high
    up in the sky
    I'm caught up in a dream
    My fears they fade away
    It's my reality
    And now I know the reason why
    I've got to make a change
    Grow stronger every day
    I need you here with me
    I'm trapped in the dark
    but I'll never give in
    I gotta break free,
    escape this endless nightmare
    I won't stop
    Crossing field by LiSA

  15. Not bad, but I think it's still missing something. You know that sudden lightning strike that occurs whenever one of the Shifters turn into a Titan? My suspicion is that that energy is being transmitted down from orbit by an array of solar-powered satellites and being transformed into additional mass by unknown means. This in turn would indicate that AoT is set on a post-apocalyptic Earth and that humans created Titans at some point in the past, either via genetically-engineered yeast cells (as per your theory) or some form of nanotech — or maybe both.

  16. MatPat: Death Note, Attack of Titan and Full Metal Alchemist are the best anime’s
    Me:You forgot about those that make you cry at the end and those that are humourous.

  17. Uh oh, Sasha’s on her way. HANJI PROTECT THE TITANS!!!

  18. Wait if titans are bread and humans can turn into titans… then I guess they aren’t lying when they say “you are what you eat” huh?


    Sand. Sand from the paths. That is what titans are made of. The bodies of both pure and titan shifters are created with that sand by Ymir Fritz and are transfered from the paths to reality

  20. So I did some math but I think you’d need to go into it extensively. In SnK it says that the wall of Shinganshina (idk if I spelled that right) 50 meters tall. The Washington Monument is 555 feet tall which equals, 169.16 meters. The wall is a THIRD of the height of the Washington monument. Also the 5 meter titans are shown to be so large but it’s only 16.4 feet. That’s about 3 humans tall or less. Levi is about 5.25 feet. So they are about 3 Levi’s tall. (Not exact but whatever) something about this doesn’t quite add up. Could you do a video doing the math of SnK. I don’t know how tall all the walls are but I’m assuming they are mostly the same height. I think that their measurements are off somehow but I don’t know.

  21. Okay so I read the manga and I already know what and who the titans are. If u want to know what they are just read the manga, it's amazing!

  22. Sorry it’s not yeast it’s actually a super complicated explanation about genocide and false or conflicted interpretation of history

  23. The yeast theory is basically proven wrong considering the fact that titans are probably being caused by the hands of a human, so its possible that humans created titans

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