How to Fill a Klein Bottle - Numberphile

In a 3D world, it's possible to fill 4D Klein Bottles - featuring Cliff Stoll.
More Cliff videos: bit.ly/Cliff_Videos
More links & stuff in full description below ↓↓↓
More Klein Bottle videos: bit.ly/KleinBottles
You can buy a bottle from Cliff: www.kleinbottle.com
See our videos with the Pope's Astronomer (and good friend of Cliff) Brother Guy Consolmagno:
SPACE ROCKS
• The Pope's Space Rocks...
VATICAN TELESCOPES
• The Pope's Telescopes ...
THE POPE’S ASTRONOMER
• The Pope's Astronomer ...
Cliff notes:
Cliff advises not to rely on his memory for the volume of a sphere. It's really 4/3 π r^3. Cliff also says that using a tube to break the vapor lock is challenging. Straws (even flexo-straws) kink when bent around narrow hairpin curves. And most flexible tubes (especially aquarium air tubing) have high friction against glass, so they're difficult to thread along the curve.
Numberphile is supported by the Mathematical Sciences Research Institute (MSRI): bit.ly/MSRINumberphile
We are also supported by Science Sandbox, a Simons Foundation initiative dedicated to engaging everyone with the process of science. www.simonsfoundation.org/outr...
And support from Math For America - www.mathforamerica.org/
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[@numberphile]

More Cliff videos: bit.ly/Cliff_Videos Klein Bottle videos: bit.ly/KleinBottles

[@TheRealGuywithoutaMustache]

Numberphile Your videos are fascinating

[@aninditachakraborty8856]

Just Some Guy without a Mustache exactly I love watching them

[@harikishanrakhade6108]

Aren't you obsessed with those volume-less bottles.

[@bodnotbod]

Why doesn't the measuring jug have volume by virtue of the thickness of its glass? You can flatten it to a disc but if the disc is as thick as the glass of the jug, doesn't the disc have volume? Or is the idea that when you flatten it to a disc, you just keep flattening it until the disc is impossibly thin?

[@ces-gp]

Thank you for your videos!!! Big fan! And your enthousiam makes it even better!

[@user-yy3ki9rl6i]

I swear this guy is triple of my age and also triple of my youth.

[@JohnSmith-ox3gy]

Doc with 200% more chararacter.

[@koalstolz1615]

He was unethusiastic until he was 50, and then looped around

[@nothingtoseehere1717]

its like he is on crack or something

[@na2awesome2yearsago7]

How does he jump ten feet in the air when he hears someone say something like 'shapes'

[@dougthedonkey1805]

Then you should lighten up a little

[@ze_rubenator]

"Be careful when you talk to mathematicians in the kitchen." Solid life advice.

[@daanwilmer]

That's why I only use grams.

[@sahilbaori9052]

Ok.

[@lostpockets2227]

even if ur eating chicken curry

[@GRBtutorials]

Especially topologists.

[@berfranper]

They can either teach you how to eat pizza or tell you that holes are not real.

[@cameronthompson6294]

This man is evidence of "Growing old is mandatory but growing up is optional" and i love it.

[@prsworld]

Exactly

[@shutboi4586]

He gives me john Sturgess from young sheldon vibes

[@PYSSMILK]

I love this comment

[@Triantalex]

false..

[@galliumg8483]

I love how he was super excited and happy, looked into the bag and completely stopped talking for a few seconds to eat a grape

[@fuckingghey]

Ahaha hey we all get distracted!

[@julesk1088]

That was the cutest part of the video, he was so innocent there

[@freedustin]

"A disc has no volume." Don't talk to me or my CDs ever again.

[@freedustin]

@Morris Sowards no leave my computer joke alone.

[@Exploshi]

This is an agenda by big dvd

[@dorklork4336]

Ok pucci

[@infiniteloop2094]

*T U R N S I T U P*

[@shakurvariawa8315]

About 60GB if you're taking about a blueray

[@davidcao4040]

My 6-year-old daughter be like: "What's the volume of this cup?" - "Well, does it divide the universe?"

[@richtigmann1]

Yesn't

[@meatman9099]

What kind of 6 year old asks about volume...

[@blubee2289]

R/thathappened

[@bootdude7527]

Wish this video came out when I was in Geometry

[@pirilon78]

@@blubee2289 r/ihavereddit r/youngpeopleyoutube r/woooosh

[@julius855]

This man looks exactly like the person that i imagined was gonna tell me how to fill a kleinbottle

[@drakou1117]

morbius??

[@MarloTheBlueberry]

🤔

[@hunszaszist]

2:47 "So be careful when you talk to a mathematician in the kitchen" *Threatens with Pyrex cup*

[@hunszaszist]

Whoa, okay, sorry, please put that down!!

[@solsystem1342]

@@hunszaszist put the Klein bottle down and no one gets hurt!

[@memo8996]

I've never seen a person so happy to explain something. I want this guy to be my teacher.

[@steveronese]

Pop4eto he’s teaching you though

[@geoneo6013]

Bet

[@ENCHANTMEN_]

he's like rick if he weren't a narcissistic alcoholic

[@elliotnicknamed2446]

me 2

[@epicnessatpeak]

my old science teacher kinda was like this

[@MechMK1]

Every other mathematician featured on Numberphile: "Here's my office" Cliff: "Yo, welcome to my kitchen"

[@alxkeda]

995 likes but no comments, this is very much a record

[@ianparmley1566]

@@alxkeda you ruined it

[@alxkeda]

@@ianparmley1566 indeed I did

[@alxkeda]

@@ianparmley1566 can’t be setting the records to beat too high ya know

[@aurele2989]

cliff is an amazing man, i must say

[@Elbenzo64]

There is nothing in this world that I love more than a person who is genuinely delighted to teach others

[@magnotec.]

Most mathematicians: "A Klein bottle has no volume" Me: *Bottle is bottle*

[@Uttployal8008]

Me too three year old

[@thecanaryfromthemines]

If actual professors had this much enthusiasm during lectures, I might have love mathematics instead of having a panic attack lol

[@SoumilSahu]

This dude is not normal. This level of enthusiasm would take 10 direct shots of adrenaline

[@felicityedwards1306]

@@SoumilSahu it's normal for a subject hes passionate about. My high school math teacher was the same way, and it made me love math even more that I already did. I get the same way when I talk about medicine and sometimes math.

[@themadhattress5008]

Several of my professors had a great amount of enthusiasm -- and by proxy classroom to professor engagement -- when I was in college. It's not unheard of, especially when they're really passionate about what they're talking about.

[@BierBart12]

My history and physics teacher was that way. That enthusiasm got everyone straight As on some complicated topics.

[@ronniebasak96]

My dog isn't that enthusiastic seeing a bone

[@riyazuo]

He sounds like a cartoon character. He should do voice acting

[@bbbruh2366]

Seiyuu

[@SLA-yo4is]

Like mario

[@ethanrooney4110]

He sounds like that guy from wreck it Ralph

[@remix7345]

that's just how old people sound

[@baaaaaaaaaaaaaaaaaaaaaaam]

@@ethanrooney4110 Yeah he sounds a bit like King Candy from Wreck-it Ralph

[@Cait958]

I just graduated high school, and through all those years i really wish i had a teacher so happy and passionate to be teaching something he loves. All my teachers never really cared about their subject, this guy really gets passionate about how much he loves it, we need more teachers like him in schools. I mean he took something as simple as a klein bottle and made it so fascinating to watch and learn about.

[@jeremiahharris2403]

Klein Bottle simple? in the same sentence? blasphemy xD

[@truncatecar3429]

Me at 6 PM: "I need to go to bed early tonight so I can actually get some sleep." Me at 3 AM: "bUt hOw cAn a kLeIn bOtTlE bE fIlLeD wItH wAtEr"

[@pedrohenriquecontente332]

"This is slow" "Ah, c'mon, this is so fast compared to age of the universe" LOOL

[@elaias8528]

best response ever

[@diegofranceschin2949]

Got him!

[@christopherparks2987]

that's something the doctor would say 🤔

[@rulekop]

Actually that was a bad smart answer as the age of the universe isn't fast/slow, but long/short (it isn't a rate)

[@prateekpanwar646]

@@rulekop He should had used "aging" considering channel's name and audience

[@ccmarvmd8200]

"Oh c'mon, its extremely fast compared to the age of the universe" That's such a great line

[@sturmifan]

hes so a great person, i want to meet him

[@Zyy920]

That's like a Douglas Adams quote!

[@XenoghostTV]

@@sturmifan You can feel the passion in his voice

[@5gonza541]

CCMarvMD i’m gonna use that in the future XD

[@Ricocossa1]

Then he goes on: "This is spee compared to... Even something as rapid as global warming!"

[@brokeninkwell3818]

This man is literally bouncing with excitement and I love it.

[@bdpinc9267]

I love how he put the champions league theme for Europe 3:22

[@Maydup_Naem]

"in the rest of the world" Shows just Europe.* (._.)

[@Jet-Pack]

"Because of the conservation of something" - Cliff Stoll 2020

[@tomiesz]

my favourite law of physics

[@andersjohnson9565]

6:12

[@jamesgrimwood1285]

I'd call it "conservation of physical volume"

[@emuccino]

Came looking for this

[@letao12]

When a mathematician talks to a physicist

[@blazingthief8524]

"This is not slow. THIS IS FAST compared to the age of the universe." I like this guy

[@user-hx1jw4br7s]

Time is relative.. Age is just a number. - My Uncle in jail.

[@mailboxpipebomb]

Boom Planet that was Einstein

[@user-hx1jw4br7s]

@@mailboxpipebomb no, that was Isaac Newton.

[@mailboxpipebomb]

Boom Planet Newton was gravity and Edison was electricity. Einstein was relativity and time.

[@mailboxpipebomb]

r/woooosh

[@johnnyespinoza8]

Mathematics needs rigor but it also needs fun, lots of fun! I can’t imagine having a math professor like this gentleman! Simply awesome!

[@supremechaosbeing2696]

0:41 captions: [EXCITEDLY TAPS THE PLASTIC BALL] ...and an inside!

[@Ryan_Thompson]

As always, Cliff's joy and passion for topology is contagious.

[@nikk-named]

He's so excited and it's so fun to see!

[@666cowboy.]

I agree

[@Triantalex]

false..

[@boss_boy_]

I love this video you can tell how excited this guy is about what he’s talking about and it’s just so wholesome.

[@thehighground265]

He made my day

[@FairArc]

Wtf is that squidsmhirtz

[@bernardokaluza684]

@@FairArc it's dr doofenward squidshmirtz

[@caniget600subscriberswitho5]

He's a geek

[@MULLEN412412]

Im reminded of Doctor Emmett Brown when I watch this guy.

[@Carzey]

Doc has come a long way since he figured out how to time travel.

[@alessia9328]

This guy is *visibly* SO excited about explaining how to fill a klein bottle to us. We all know people like this make the absolute BEST kind of professors.

[@ren6140]

I like to imagine this guy just came home from buying grapes and a cameraman was just waiting there and asks him about this stuff, and just, improvises

[@_Heb_]

I like to imagine he bought exclusively grapes and also put them in that little paper bag

[@Triantalex]

??...

[@lemmy4965]

I love how genuinely happy he sounds to be explaining things like this, as if he loves passing on his knowledge to the new generation.

[@ebbiebean9385]

Unfortunately the new generation, maybe besides us that are watching, don’t care.

[@user-qf6dp4zf4p]

@@ebbiebean9385 atleast we do

[@eefsx8761]

I hope my teacher, teach me like that

[@nesto9889]

@@ebbiebean9385 I hate Gen Z 😂😭

[@soyalguienqueestamuyaburri8396]

@@ebbiebean9385 1.4 million cared

[@circuit19]

Coming from an engineering background all I have to say is, if he stuck a rubber tube down the hole in the Klein bottle that was smaller than the diameter of the Klein bottle tube, and long enough to reach the reservoir, water would be able easily enter and Air can escape.

[@AkshatSharma1505]

Great, now explain the physics of it. This is also the fastest method to get water out of an upside down bottle, right?

[@prod.royalsg1630]

This man is adorable, I love how he talks and seems genuinely excited to educate people. It makes me happy.

[@littlemasterchampion]

I love how he jumps! He's so excited! That's what science and mathematics does.

[@billbosagginz740]

And not drugs!

[@nykal1510]

@@billbosagginz740 Drugs do that too teehee

[@billbosagginz740]

@@nykal1510 ik I was being sarcastic lol

[@jaysonaarontan8752]

It makes you crazy?

[@maxrubenstein1447]

Or maybe his knowledge is rotting his brain?

[@donnabrahamworsley5857]

Guys this is just the back to the future dude in his early ages.

[@tntmage5303]

doc Emmet brown

[@AntonioM8]

Come on it's not that hard to remember the name "Doc"

[@aalhard]

GREAT SCOTT!

[@hubertfarnsworth6824]

You mean Doc Brown

[@unworthy.potato]

I didn’t know this guy could skate board?

[@tylerle3915]

I love this guy’s energy. I can tell he really loves what he does

[@oceanman3676]

I’m not usually interested in math and physics but this guy’s enthusiasm just makes me want to study. I wish my teachers are like this and if so I can study everything

[@galgrunfeld9954]

"conservation of something" - ah, a true physicist.

[@Baddaby]

It's because he doesn't want to say conservation of volume when he just said it does not have volume haha

[@genericusername4206]

Baddaby true

[@carly7958]

The editor put in a lot of effort into those graphic sections and I just want them to know that they are appreciated

[@brettcraigsly7102]

Imagine living life with this sort of excitement and enthusiasm for your work. Not about money or promotion, but just the art of the subject matter. It sounds like he almost starts laughing like an excited child on Christmas morning while he is talking. How wonderful and joyful must that life be? I envy him.

[@p.f.886]

People: *Maths and Physics are boring and hard to understand* This man: *I'm going to change this man's whole opinions.*

[@hannesgroesslinger]

9:03 i'm confused. If you get a Klein bottle nice and dry on the "outside", would that not automaticly make it dry on every side?

[@sturmifan]

oh oh yea

[@pratyushbhattarai5632]

@@sturmifan Hey actually meant "some of the sides" maybe??

[@skywatcher458]

@@pratyushbhattarai5632 aren't klein bottles had only one side? Well At least from four dimensional being views

[@rickpgriffin]

Well you can dry a measuring cup on the outside but a topologist would insist you missed a spot When talking about holding volume like this video is, orientation and inward/outward facing parts of the vessel matter. Similarly you can MAKE a mobius strip have an inside/outside by wrapping it around your wrist--there is clearly a part touching the wrist and a part facing away from the wrist even when it only has "one side"

[@amodgawade4323]

@@pratyushbhattarai5632 theres only one side on a klein bottle is the joke

[@HowRandomIsRandom]

Love how the birds fly at 2:13 Makes him look like a wizard

[@originsmenagerie9920]

This dude has crazy mad scientist vibes and I mean that as a pure, genuine compliment

[@teho1536]

He seems so happy to just pass on his knowledge and I want more.

[@ErC0411]

6:43 "come on, it's not slow. This is fast compared to the age of the universe." -Me, when I am procrastinating again with my thesis.

[@alexanderenrique3058]

How come that KZbin knew I do too?

[@ethaman2799]

ErC0411 me while walking my 100m sprints at school

[@dabunnyrabbit2620]

sometimes thats the best way, makes sure you got it exactly the way you want.

[@pluto8404]

I can do 100 pushups pretty quick.

[@lucasfc4587]

THIS QUOTE IS GREAT

[@peet4444]

Love how he just started pulling out grapes from the bag and started eating them 😂😂

[@clementm5417]

"I could put stuff int... I put stuff into it !" [starts eating grappes]

[@y.m.o.fh.s.c8580]

@@clementm5417 I loved that part I was hoping someone would comment about it

[@brandonmtb3767]

Professional KZbin content right there

[@arpit92k]

oh, the world before coronavirus. Now you have to wash everything.

[@anormalandnon-suspiciousbo5290]

ChickenNuggetDinosaur ChickenNuggetDinosaur totally a mood right there

[@davidxxxx4612]

That was truly interesting. He brought life into what many consider a dry, tedious discipline. Really enjoyed listening to this

[@CranyUnknown]

This man is the only person that’s over the age of 40 and can talk to young people in “our” language while not having it be cringy

[@zerid0]

I need help. I'm training my baking skills for pi day but the recipe asks for 500ml of water and I don't know how to measure it. I got a 500ml sphere but I didn't seem to be able to fill it with water because it wouldn't go through. So I poked a hole in the sphere but now it has 0 volume. This is a nightmare. There's no way for me to measure the water >

[@givrally7634]

Make the water go through the 4th dimension and back to enter the sphere.

[@kenet7877]

@@givrally7634 solid advice, works everytime

[@policesquad]

Buy a pi from the Bakrs shop.

[@Kazutoification]

Fix the hole after you've poked it. That should solve your problem.

[@OSDisco]

@@policesquad That's clever

[@richardpike8748]

"Conservation of something" I guess you don't need a physics degree to be a topologist XD

[@Nylspider]

Read this just as he said it in the video lol

[@tandemic4232]

I love this guy, so charming. I wish I could have him as a teacher.

[@anomalocarislover7254]

I know that feeling of being so excited to explain something you love, even to people who might not be as interested as you are.

[@Askme4ful]

“How to fill a Klein bottle” Just stick a hose in it There it’s filled

[@DevanshGuptaChess]

Where will the air inside go?

[@mattschutt2340]

The ALLrOUNDER SS imagine less like a garden hose, and more like thin airline tubing on a syringe or something.

[@DevanshGuptaChess]

@@mattschutt2340 That should work...... Wouldn't be as exciting as the mathematician wants it to be

[@anansiackhasone3428]

It’ll explode

[@anansiackhasone3428]

Because it’ll pressurize air and it will explode

[@thecountercounter9127]

First minute in and i already love this guy. Hes so bouncy and he feels like he still has so much livliness in him, which i love. He reminds me of my biology teacher, he just have, genuine, legitimate love of teaching

[@Axel230]

I wanna be this lively when I'm this old :3

[@ryanrees9248]

i was 20 seconds in and loved this guy

[@lakshyagangwar2451]

I mean why are biology teachers are supposed to be "lively"🤣

[@AzuRemilia]

I love how jumpy and energetic and just excited he seems about the topic. He should be a teacher

[@adityakappla8384]

So excited. So wholesome. I came for the Klein bottle but stayed for his excitement.

[@Neefew]

6:30 Cliff gets pulled over for speeding the police officer tells him that he was going too fast "compared to the speed of the sun through space, I was barely moving"

[@pranavlimaye]

"Wrong, Officer! The Earth is actually moving in the opposite direction 10 times as fast! I legally had no choice...."

[@pyrogenic]

I can read this in his voice and its so fitting

[@vojtechstrnad1]

Because of relativity, there's no such thing as the speed of the sun through space.

[@pranavlimaye]

@@vojtechstrnad1 To clarify, yes. That notion is also called relativity. GALILEAN Relativity to be specific, formulated by none other than Galileo Galilei

[@Soldier842]

(speed is always relative to another object so you can't have "the speed of the sun through space")

[@obsidianop9802]

"You can see actual Klein bottles in the 4th dimension" Cliff: *Happy topologist noises* "They can't contain anything" Cliff: *Sad topologist noises*

[@GigaOtomia]

Always love listening to Cliff talk. He's so happy and animated about everything.

[@rans0mware]

The happiness on his face and his voice is really nice. It shines with passion to know, and to share

[@Mr.Roboto_]

6:40 "Still pretty slow" "I A M S P E E D"

[@gappyoooo]

:D

[@odysseusoutis7581]

3:24 He used the Champions League theme for the european union. I'm not even mad.

[@becauseimapotato7599]

*far from it, actually*

[@adambis337]

i was looking for this comment

[@christianfirth-godney375]

...which is actually Zadok the Priest from Handel's Messiah with the lyrics changed.

[@lukashofstetter9324]

@@adambis337 same lol

[@Maydup_Naem]

"Everywhere else in the world" Shows Europe* Eurocentrism is a disease.

[@politicallyinaccuratetoast4757]

I love his enthusiasm, he seems so happy to teach us how to fill a Klein bottle

[@Camarada_Jeff]

"be careful when you talk to mathematicians in the kitchen". I took that for life.

[@balaalalaslk]

"Conservation of something" Spoken like a true mathematician, never a special case and only general ones. Something can be mass... or whatever lol.

[@verifiedgentlemanbug]

Hahahahaha

[@thesos320]

I was searching for this comment!

[@nineball039]

Conservation of bubbles.

[@nametry3]

@Kitsune 3.14 But the mass if air going out is not the same as the mass of water going in or is it? It's more like conservation of pressure. But pressure is not really constant, it just tends to an equilibrium so... consevation of something :D

[@akuakkk1908]

Conservation of volume

[@toferg.8264]

"This is fast compared to the age of the universe." Spoken like a true government employee.

[@carlosdasilva2409]

Gosh, this man is so fun to listen to! His excitement on teaching is kinda adorable in a way. Cliff, you are an awesome man!

[@hugogamboas.5550]

Every professor should be this passionate and cheerful. Thank you for a great lesson sir.

[@dougthedonkey1805]

2:48 “So be careful when you talk to mathematicians in the kitchen” In the... mathemakitchen?

[@dougthedonkey1805]

@technix the fox thank you

[@achilles1889]

oh cool, you made me laugh. Here, have a like!

[@dougthedonkey1805]

@471LL4 YTB thank you boss

[@PineappleDevourer]

Underrated

[@boingo696]

Hey man, that was very funny. I laughed.

[@andarted]

Cliff: "Than, get it nice and dry on the outside." [9:02] Me: "On the what?"

[@applepie1272]

?

[@peasg9839]

@@applepie1272 klein bottles visualized on 4d have no in and outside, due to it only having 1 side. I dont know if this is exact, correct me if im wrong

[@g.tucker8682]

andarted: “On the what?” Niiiice!

[@maxwellsequation4887]

Yeah! They just have one side

[@t._dot]

@@peasg9839 if we think about it, don't most cups just have 1 side as well...

[@somakun1806]

He is so happy explaining something he loves. Truly makes us the watcher happy seeing how excited and happy he is.

[@Makszi]

His enthusiasm brings so much heart to this video. If only all educational material was this easy to watch!!!

[@BeTheGr8]

2:12 I love how the birds in the background make for extra effects. Almost a cartoon.

[@ajaybyadgi2672]

Haha true

[@amaansadri1168]

It puts a smile on my face to see how enthusiastic he is

[@jonathanguthrie9368]

That attitude is learned. That means you can learn it, too, if you want to.

[@VincentGroenewold]

@@jonathanguthrie9368 Not necessarily learned, it wasn't taken out of him by the process of schooling etc. :)

[@TheNewGreenIsBlue]

It feels like he's like... Ooh ohh... someone wants to listen to me ramble on in my kitchen!!! Not that there aren't people who are interested, but the majority of people's eyes would glaze over.

[@lordkekz4]

@@VincentGroenewold I agree, I often find myself being similarly enthusiastic about (usually scientific) topics. It is sad that school systems manage to suppress the flame that is the curiosity we all have with boring and stressful everyday life. You would think that it's possible to interest almost anyone at least mildly in most scientific topics.

[@VincentGroenewold]

LordKekz Yep, I’m actually a father of a child with high iq and he couldn’t cope with a classroom. We ended up having to take him home as he got depressed, unfortunately that’s not allowed in the Netherlands so you have the super weird and stressful situation where you want to teach him at home, not going down the path of going the wrong way and still having to send him there. We couldn’t justify that for him, so we moved abroad. It took us a full year to get him interested again, at least he’s happier now and starting to get excited a bit again, but what he had before school, never really came back. I read that many famous scientists had the exact same experience. We definitely need to change that.

[@ianmorin8017]

I just every once and a while watch this channel and not only do I like channels like this but this man just makes me happy that’s all there is to it.

[@snoozyyaloozy5511]

I love this man's energy so much. Wish I could've had him as a teacher.

[@Uderscore]

so basically, we are all inside of every measuring cup in the world.

[@niconico4962]

And every measuring cup is also inside all of the others measuring cups

[@joshuanorman2]

Does this mean the outside of each measuring cup is inside the inside of each measuring cup?

[@Daaljeli]

josefu joestar

[@anupriyamarora4253]

Except the ones that are currently inverted on countertops and other places that form a seal

[@mueezadam8438]

My friends {∅}: So, can you drink out of a Klein bottle? Me: well yes but actually no

[@SumNutOnU2b]

With a straw maybe

[@Hampardo]

I like that you're friends with the empty set. My set of friends is the empty set itself :(

[@absolutehuman951]

Every time remember that Futurama episode!

[@viliml2763]

@@Hampardo I wonder if mueez adam really intended it to be interpreted that way as a math joke, since he used {} instead of (). Anyway, I really do love the set containing the empty set. Among other feats, it is the set-theoretic realization of the ordinal equivalent of the fascinating number Wau!

[@IconOfCyn]

@@viliml2763 every course I've taken defines sets within curly braces instead of parenthesis

[@GabriTell]

This man is the definition of devotion

[@IntensiveCareSecondary]

The amount of energy this guy has for teaching is amazing

[@vanibandodkar31415]

2:13 omg the birds LMAO

[@mazethewise1293]

random person hahaha oml

[@saintpoli6800]

Dude legit has more movement than me, and I’m still a teen.

[@mihailmilev9909]

Same

[@Gator_nit]

Who wouldn’t be hyped for filling a bottle

[@DanksterPaws]

@@Gator_nit Hmmmmmmmmmmmmmmmmmm

[@julianhaffke3709]

So cute how he is so excited! Makes so fun to listen to! 😊😍

[@raqha4575]

This man makes me so happy, just by looking at his happiness about this topic.

[@ScottMaday]

Me: *sees video* Me: The only person who can adequately explain this subject is the same man who built a robot to fetch his catalog of Klein bottles in his basement Me: *clicks* Me: what a relief

[@neros12346]

I love that this man just has a bag of grapes

[@jcrowley1985]

You mean you don't ?

[@arlert4396]

is that uncommon?

[@bastardowl]

I have one of his Klein bottles on my shelf! He included a photo he took of it next to the first daffodil of the season and a letter describing how he was about to ride his bike to the post office to send it. Very wholesome guy.

[@margheritaserafini2547]

AHHH I love this guy! If all teachers were this enthusiastic I think everyone would be passionate about learning.

[@snowman7514]

"Don't let the mathematicians touch your kitchen, don't let em near your recipe book"

[@dylanparker130]

"this is fast, compared to the age of the universe!"

[@ThePCguy17]

Yeah, so is the human aging process.

[@ci.netproductions]

@Dylan Parker ... And so is the age of our universe...

[@aakansh45yearsago83]

The excitement in this guy is everything we can hope for from a teacher.

[@AndrewVan07]

the vibe and energy this guy gives off im going to sub this is really cool

[@electromika]

I got immediately excited when Cliff appeared on my screen.

[@butterscotchdoesthings1126]

so did I lol. I think we all did.

[@mal2ksc]

@@butterscotchdoesthings1126 I think it's impossible not to. Excitement flows from high pressure to low, and Cliff Stoll is an excellent source of high pressure excitement.

[@wariolandgoldpiramid]

@@mal2ksc I've never seen him before, but I liked him instantly.

[@S_--]

He's so joyful when talking about Klein bottles, like me when I go outside and see the stars!

[@woot8573]

Its lowkey wholesome how happy and excited he is aaa I love it

[@pixelxdragon]

Theoretically speaking, if you were to feed a small rubber tube into the Klein bottle would you be able to fill it faster since there is a way for the air to escape?

[@oceanbeans8546]

I’m constantly scared he’s just gonna drop something with all that energy of his

[@stormysamreen7062]

**DANGER ALERT** The excitement from this man is contagious

[@moeheil8839]

Love this guys enthusiasm, subscribed