The Physics of Portals (Made With Love)

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I've spent too much time thinking about how portals could work in the real world and, yes, I guess that is somewhat weird, but well. From energy conservation to momentum conservation to moving portals, I have it all sorted out for you. And the cake is not a lie.
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00:00 Intro
01:14 Portals and Wormholes
02:05 Energy Conservation
04:47 A Detour to Dark Matter and Back
07:42 Momentum Conservation
10:27 Moving Portals
12:21 Portals Aren't Flat
13:45 More Problems
14:20 Cake
14:27 Learn Science With Brilliant
#physics #portals

[@pedrofelipefreitas2666]

Sabine in a cosplay is not something i expected, until i remembered that every scientist is a nerd at heart lol

[@2adamast]

You mean, appreciating star wars and its shitty science is mandatory?

[@noahtekulve2684]

No, you don't need to appreciate everything that's considered nerdy. You can pick and choose.

[@captasticts8419]

@@noahtekulve2684 yeah yeah let's let people have fun

[@superneenjaa718]

​@@2adamast it's not, but scientists are always obsessive about something. I for one loved shows and games with fantasy elements. Sci-fis often gave me headaches though.

[@keithchiang9770]

@@2adamast I can't consider Star Wars sci-fi, it's more fantasy.

[@eaglepeakalpha]

The costume makes the video all the more scientific

[@offendersofficial]

the nerf guns make it a thousand times better

[@AbuIvan180]

She kinda bad tho

[@Toca_waffle843]

exceptionally so

[@MrPlusses]

Physics isn't the only thing that's hard right now.

[@PrimRoseLane]

Speedy thing goes in: ..... wait... that was it.

[@Methodician]

I don't think anyone could fall asleep watching Cosplay Sabine open a whole can of wormholes on a classic physics game 😂

[@menyasavut3959]

a can of worms. can I eat it? oh, worm-holes *facepalms*

[@deanmichalos6848]

Exactly. My housemate has been keeping me up for a week with his mania so I'm up in the middle of the night all bleary eyed watching this on repeat because I can't stay focused on the science.

[@CrimWorld9]

Sabine Cosplay was something I never expected but fully support!

[@pauliedweasel]

But you know we all wanted it! 😉

[@1112viggo]

So does Mr. Hossenfelder. Grrr...

[@jmunt]

“I’m not here for the fun” in full costume 🤣

[@antonk.653]

Not only that, while having a stern face and only cracking the usual minimal amount of jokes.

[@Jiraton]

This is so British XD

[@speedy3749]

@@Jiraton She is german. When telling jokes with a straight face, we are up for a contest with the Brits ;-)

[@astrocoastalprocessor]

Was just listening to the audio and glanced at the screen like 😮😮😮

[@RokeJulianLockhart.s13ouq]

​@@Jiraton I think she's actually German, and it fits even better if so

[@NimbleBard48]

*looks at thumbnail*. "No, she didn't..." *plays the video*. "Holy GLaDOS! She did!!"

[@zyansheep]

Literally thought it was thumbnail photoshop, clicked on the vid and was like *no way*!

[@NoGodsUnderStars]

I clicked on a different video to watch first, and with a microsecond left I saw the thumbnail and thought, "Was that a Sabine video? Was that Sabine?!?"

[@TheeSlickShady]

I also thought good clickbait But I watch all Sabine's videos anyway Then she walks in and I couldn’t believe it 😮❤ Authenticity and scientific integrity is why I come here

[@Angel-wo8gv]

14:26 wait.. IT'S NOT A WIG?

[@LuisSierra42]

Common Sabine W

[@LaraFabans]

I'm so glad you did this. My daughter and her friends were nuts about Portal. And she got her father a shirt that said The Cake Is A Lie on it. Can't wait to send her this.

[@hyunseo3797]

You do accelerate as you fall in Portal. There are puzzles which require you to jump down from different heights into portals to build enough momentum. Also the reason why there's a cap on the maximum velocity of the player is that terminal velocity exists (this is also the title of the achievement you receive for putting 2 portals facing each other vertically and jumping inside).

[@TheAngelsHaveThePhoneBox]

Yep, the portals in the clip Sabine showed just weren't aligned properly which caused the player to hit the edge each time, preventing the "infinite" acceleration to occur (up to the terminal velocity of course).

[@D.Eldon_]

"I'm not here to have fun, I'm a physicist!" Hilarious!!! The costume was great. More, please!!!

[@ashroskell]

Oh, Sabine. Is it wrong of me to admit that your outfit is doing things to me? . . . What were you saying again, Sabine? Something about physics, right? . . . Can we get the poster somewhere?

[@sluggo206]

This is like the "I am lying" paradox. She implies physicists don't have fun. But she's a physicist having fun when she says that.

[@johnalden948]

I'm in love with teacher

[@Netro1992]

Let no one ever say that Sabine isn't dedicated to her craft.

[@milanstevic8424]

That's Lara Craft... Umm Croft

[@rayrocha4189]

This is one of my favorite videos by physicist

[@ExcaliburPaladin]

This is easy every student's favourite video that physics teacher played them

[@Maxwe1I]

The portal gun doesn't use wormholes, it uses quantum tunnelling. One of the images of the disassembled images of the portal gun deliberately state this

[@Maxwe1I]

@@Husseinalgerf my guy it is literally cannon how the portal gun works, if you've played the game you've probably seen the loading screen where it literally calls the portal gun a "quantum tunnelling device"

[@Husseinalgerf]

@@Maxwe1I Thanks, I didn't doubt that, I meant something else, my bad it was not accurately related to your comment, so I deleted it.

[@Dalroc]

Sabine getting basic facts wrong? Sounds like everything is as usual then!

[@AFastidiousCuber]

That same screen shot also depicts the portal gun as somehow containing a miniature black hole. I'm pretty sure the people who made that graphic don't really care about the physics and were just randomly mashing together technobabble. Also, a quantum mechanical interpretation of the portals would probably be worse. Quantum tunneling is probabilistic and quantum entanglement can't be used to transfer data.

[@midbc1midbc199]

Cave Johnson couldn't afford black hole guns so he went the cheaper route

[@JaguarBST]

Puts on a costume, hair, portal theme background, animations, gameplay footage and nerds out about portals and their science and says “I’m not here for fun” with a straight face. 😂

[@user-rz7kn5zw6g]

Love the outfit

[@juggsauce]

Deadpan is the best pan. German humor ✌️

[@HairBallaz]

Sabine promised us there'd be cake. She did not disappoint

[@denirodarkqwerty]

i was disappointed. was interested in a different variety of cake but never peeped

[@VenTGM09]

@@denirodarkqwerty what is wrong with you 😔

[@sfcrosby1]

The cake is a lie

[@a.hardin620]

I was ready to watch this video with one hand.

[@ZhePorgi03141]

@@a.hardin620 The fuck

[@jackcox7178]

I'd argue that thinking and talking about the science behind anything, no matter how fictional, is an EXCELLENT use of your time. Applying the knowledge we have to different hypothetical scenarios is a great way to reinforce our understanding of it, as well as test the limits of what we know. Examining what we've learned from different angles and taking concepts to their extremes is how we discover new things or gain a deeper understanding of what we thought we knew. And, if nothing else; it's a fun way to keep yourself and others inspired, engaged, and thinking creatively. Based off her content, Sabine definitely understands the importance of making science fun and engaging.

[@justaguy8982]

Seeing Sabine in a cosplay wasnt something I expected for today, but I'm glad it happened.😂

[@TheBaldrickk]

To be honest, I wasn't expecting it ever.

[@astrocoastalprocessor]

@@TheBaldrickk What if she started selling her digital wardrobe 😅

[@player1_fanatic]

Hint: Go back to the begging of her channel, when she made music videos.

[@kruks]

If you did expect it, I'd have questions.

[@rhetorical1488]

@@astrocoastalprocessor based on my knowledge of the internet she would become a multi millionaire😄

[@gliderfan6196]

"I'm not here for fun - I'm a physicist" Such a humble statement.

[@geordi-gabrielrenauddumoul449]

Physicist AND German, absolutely no fun allowed

[@Boris_Chang]

Sabine: “A lot of people don’t believe Germans can be funny-because they’re too fixated on things like mathematical precision and the like. That’s not true. I can be fun and funny. I know some good jokes-let me share some with you. Okay? Joke number one…”

[@cobrasteve427]

Holy costumes! The physics needed for it to fit so well adds a whole new dimension to your videos! ❤

[@ruprecht9997]

On the left "this guy again" and on the right Sabine in that outfit, and then repeatedly claiming "this is not about fun!". Gotta love German humour!

[@HelenaSaysRawr]

Best birthday gift today: Sabine in full cosplay talking about portals and nerding out about their science. 10/10

[@coordinatezero]

My birthday too -- what a present!!!

[@Tight_Conduct]

Happy birthday to us lmao, couldn't agree more!

[@jonathanozik5442]

Happy birthday!!!

[@yunusemreselcuk2128]

I expected that the thumbnail was just a photoshopped image or an AI generated image and that's all. Wow, Prof. Sabine has improved the fun factor of the video exponentially!

[@John-gz8tf]

Back when I was young and had lots of energy (in the 1970s) I used to fantasize about having portals at the top and bottom of my favorite ski hill so that when you got to the bottom, you could ski into the portal and come out at the top and just keep skiing and skiing. Now that I'm older I appreciate the break provided by taking the lift back up to the top!

[@Thomas-gk42]

Nice idea!

[@Robot_Bandit]

When I see people walking through a portal in a movie, I can always tell it's not real because they never show any wind. Unless the atmospheric pressure at both locations is exactly the same it is going to be a very windy portal. We should be thankful nobody has ever opened a portal between earth and a location in deep space. That happened on Mars once and you can see how that turned out.

[@EarthlyMix]

I'm a black South African living in the rural areas. I love Sabine Hossenfelder because she makes me think beyond my village circumstances. Her way of explaining scientific concepts is humerus and intriguing.

[@Thomas-gk42]

Best wishes from Germany. Sabine is truly our best export of the last decades.

[@noway8233]

Cool men , its good to lear and think😊

[@karrde54]

I don't have a bone to pick here, just puns.

[@KippGenerator]

@@Thomas-gk42 I'm in love with her now. What was this video about again? Edit: OK, maybe that was a stupid comment, sorry about that. I love her videos. It is one of the things I look out for every day.

[@frun]

I'm happy to hear people in rural areas of Africa have access to internet🙏

[@jeffwads]

I don't need a degree to know that Sabine looks amazing in that cosplay outfit.

[@tray22]

She should be proud of how in shape she is.

[@thirstyCactus]

In Portal, there is acceleration as you fall, however, terminal velocity is relatively low.

[@adolfodef]

If the portals are placed one directly on top of the other, you will experience a little less acceleration than normal. . This is caused by the lower portal effectively "blocking" the "line of sight" of a small % of the mass of the Earth [spoilers: the lab is not on the Moon, or in orbit...]; that is directly underneath (but not most of of it, that can still "see you" from the sides). . There is also the fact that you are pushing down air every time you "emerge" from the upper portal, but air can not pass-through the lower portal freely (there is a very weak "force-field" barrier preventing this "casual" flow, that is still not strong enough to block water or a vacuum present on only one side); so the acceleration of your body is slightly dissipated by air resistance transferring energy to the sides, while the relative high pressure below you & low pressure on top of you makes a "cushion" effect. -> Combining both effects, you are accelerating a bit slowly & your "top speed" terminal velocity is also a bit lower.

[@samsanchez8997]

Thank you! I agree but could not put it into words. The gravity pull on the makes up for the lack of gravity once you pass through the bottom portal. Therefore you should slowly increase velocity until you reach terminal velocity.

[@gefginn3699]

You crack me up Sabine ! Much love, care and blessings to you and your family/ channel/ efforts ! 💛

[@jasonm2081]

Thank you. Thank you for being wiling to be silly and have some fun and still teaching us at the same time. I think too often scientists fall into the "I am working on things you can not and will never understand and I feel no need to explain why I am doing what I am or how it is being done." Thank you for continuing to make learning about science fun.

[@ewasteredux]

Cosplay + Cake = the worlds most interesting class. We need this in public schools!

[@akompanas]

The cake is a joke on the plot twist in Portal (either one or two, don't remember).

[@WalterLoggetti]

@@akompanas The cake is a lie (portal 1) :)

[@tomholroyd7519]

tbh I was too distracted by her six pack to remember what the video was about I'm sure if she does 10 or so more videos like this I'll get used to it

[@Inertia888]

Now I wonder if Sabine could resist playing with a hula hoop while making the video, and pretending that she was jumping through a portal. (certainly wouldn't be having fun while doing so, but for science, of course! )

[@gabrielwalters7084]

What better way to get science to the masses? Keep this up and we'll soon have a scientifically literate majority

[@melnikhoogland7545]

Yes the costume of course. But an entire 15 minute video waving around 2 colorful plastic squirt guns with every gesture is also absolutely priceless.

[@rundata]

You made more fans happier than you can imagine today

[@rundata]

Shout out to my creeps Ahem.. Peeps

[@msromike123]

I played that game for MANY hours, and never once thought about it possibly being a black hole. Thanks Sabine.

[@drkevorkian2508]

This is actually confirmed in one of the Portal 2 trailers. kzbin.info/www/bejne/rYmcZpZubdalm8k

[@maxhagenauer24]

Well Glados has her way of finding how to violate conservation of energy.

[@chillfluencer]

...then think of it as a wormhole instead.

[@SBImNotWritingMyNameHere]

The portal gun has a miniature controlled black hole inside Wheatley talks abt it I'm pretty sure

[@billjohnson6863]

Sabine’s deadpan delivery works well with the costume 😂

[@NPC-bs3pm]

Seems like a legit person coming from the sci fi universe. It works.

[@tomholroyd7519]

I guess I haven't seen the movie but does she have holsters for the portal guns? I know it's always a problem for presenters to know where to put their hands, like if they are holding an ice cream cone when an international diplomatic portal opens up

[@JeremyB49503]

Sabine has an arthouse-Bill-Murray level mastery of deadpan! I recently listened to her Existential Physics audiobook which was read by a narrator and the humor fell flat but I could still appreciate it by imagining Sabine saying it all in her own voice. We're so fortunate to have her.

[@ChrisBigBad]

This was a triumph. I'm making a note here: HUGE SUCCESS! Danke. Damit habe ich nicht gerechnet ^^

[@herzogsbuick]

Sabine, I am but a simple bass player with an EE background. In the two years or so I've followed you on KZbin, you give me hope: for those who distrust mainstream physics, because of your tact, and for those who look down on others with disdain, because of your tact. I've commented on many of your videos, and appreciated all the time you've put into this. Your channel has changed and adjusted a lot over the years. And it was never appropriate before, and might not be now, for me to say, that, I hope you know that you are, and always have been, very easy on the eyes. From an Alaskan who just crawled out from under his broken wheel bearing. You were hot before you put the suit on. This would be the only video or context I felt I could say that without taking away from what you do. Thank you for talking to people. And the suit :-P

[@usdescartes]

Portal in the ceiling and floor accelerates a LOT. But just like in real life, eventually air resistance brings you to terminal (constant) velocity. Makes TOTAL physics sense!

[@julian78W]

Yeah, that's what I was gonna say. Maybe the terminal velocity in portal is a bit too small, that's all.

[@juliavixen176]

She didn't mention in the video that in General Relativity, free-fall is a non-accelerating inertial reference frame. It is the portals themselves which are accelerating upwards. I haven't actually done the math yet, but, anything "falling" continuously between the portals would probably get spaghettified by tidal forces. For Earth's gravity this would take about 20 minutes of falling.

[@pedrolanna1551]

But doesn't the air itself also, mostly, goes into the portals, picking up speed and eventually almost catching up to the speed of the falling object/person? From the "air's"POV, it's as if several objects are falling, one after another, dragging the air on this current along with it. If we could place a glass tube, preventing the air from outside the "path" of the falling object to mix with the air that's already being dragged, it should reduce the air resistance even more. If it's a person, it would also eventually suffocate from running out of O2, if we used the glass tube or if it's a closed room. If we remove the air resistance with a vacuum seal, would the object accelerate indefinitely until reaching close to the speed of light?

[@johnnyc.31]

No duration of falling in our atmosphere could result in spaghettification. Ask Felix Baumgartner.

[@brainstormsurge154]

​@@pedrolanna1551 Certainly never thought about the air that much. In the second game (spoilers) when you make a portal to the moon the vacuum does drag everything out that's not nailed down like what is usually depicted with air an airlock exposed to space. Because of that, one would imagine that the air in the room with two ends of the portal simply moves and mixes around in a mostly normal fashion. What would be interesting to see, if things just accelerated towards the floor (Earth), is if you assembled a modular sealed tube from the floor to the ceiling. It's just the glass tube you described. However, what I don't think was thought of is would the air itself continually accelerate? If it did, how fast could it go before it eventually went so fast that the friction it had with the tube broke the tube? Then again, what if the tube was frictionless like a superfluid? Then you start to think of materials like if the tube was filled with superfluid or plasma instead of air. Or what if it was a vacuum inside the tube and there was a small object that just kept accelerating, what then? It's certainly interesting to think about. But what if a real portal has something like a surface tension that prevents anything without enough velocity to pass through like was depicted in one possibility within the video then even a vacuum wouldn't actually affect the air with the portal with air. At least, not without the portal moving in a manner that would break this tension. At least that's what seems like might happen as I'm not a physicist and wouldn't know how to put together the maths.

[@ManuDunno]

I did not expect Sabine to be in full cosplay one of these days. I am not disappointed.

[@thrwwccnt5845]

sabine lain cosplay next

[@ManuDunno]

@@thrwwccnt5845 Hell yeah, I second that.

[@MervinGeulerHere]

Sabine's dedication to her channel is something for all of us to be proud of!!!! You're Amazing!!! ❤❤❤

[@dannypope1860]

You wouldn’t end up falling to “the speed of light”… there is wind resistance… you would stop accelerating at your terminal velocity…

[@Babihrse]

But is there really wind resistance when two portals are right next to each other pretty soon the wind is going to be howling along with you from the air being pushed and transported rushing towards the entrance

[@JustinLe]

man, if only you watched the video for ten seconds more to get to the point where she addressed this

[@kevinnugent6530]

So do it in a vacuum. Do it on the moon.

[@williammartin6510]

Between Sabine style of speaking and the waving of the pistols, I kept waiting for her to say “ Go ahead punk make my day”

[@scene2much]

Is that a 'Clint' in her eye that I'm seeing?

[@SoftSemtex]

imagine the workout

[@williammartin6510]

The Good, the Bad and the Physicist

[@WouterCloetens]

… but in German, in the voice of the singer of Rammstein.

[@jeffwong1310]

appreciate how dedicated you're in your video, with this cosplay!

[@goldenshatter]

This used to be a music video cosplay channel until it became a fearmongering climate channel.

[@antonk.653]

@@goldenshatter Well, and physics sometimes, actually all the time. Do you even watch the content?

[@goldenshatter]

@@antonk.653 I was an very early subscriber here for the music videos stayed for the sci-fi in real life explanation videos.

[@antonk.653]

@@goldenshatter What do you mean by "Sci-fi in real life" ?

[@ManuelBilderbeek]

Hossi, you rock. Lots of appreciation from a fellow physicist here.

[@CoughSyrup]

Debates have raged on in forums for years about the physics of entering a moving portal, with no clear consensus, so I was surprised to see you arrive at a definitive answer seemingly without a violation of momentum or energy at the end.

[@abelnemeth4346]

It is because, she finally takes conservation of energy seriously, which is largely ignored on the forums. If you were to put a portal next to you on the wall, and one on the ceiling, you would have to push your body with great force, in order to get to the other side, because you are doing the same work as if to climb up there on a ladder, or anything. It is as if you were to do a push up, but about 10 times your body weight (in case of moving your body 10 inches, and the ceiling being 100 inches high.) It would feel like pushing against some very hard rubber. You would be likely to bounce back instead of falling through.

[@wesb8159]

Very impressive. The portal information was good too.

[@stefcas]

Funny!

[@cozzy124]

...what do you mean by that-

[@spitefulwar]

Now you've done it. We demand the catsuits to stay.

[@RokeJulianLockhart.s13ouq]

It would definitely move this channel into a unique niche

[@timberwoof]

I want to see Alex O'Connor and the Genetically Modfied Skeptic in catsuits.

[@jamiluvvi6736]

Yes cosplay from now on!

[@RokeJulianLockhart.s13ouq]

@@timberwoof GMS would be even less charismatic than Sabine in a catsuit, and it would be even more contextually inappropriate. It'd be amazing.

[@AlexWalkerSmith]

​@@timberwoofdon't forget Steven Woodford 👍🏻

[@themarlboromandalorian]

I can appreciate the level you went to for a good thumbnail. Because I've seen plenty of your videos, and I appreciate the brain of and admire the individual who puts so much effort into creating videos to help the world understand physics. Excellent work.

[@andyfox6023]

I'm going to have to play this video again but with my eyes closed to be able to concentrate on what's being said! ...This is definately your "look". A physically perfect physicist ! Ooh la la ❤

[@aarontrue5719]

This was a triumph. I'm making a note here: HUGE SUCCESS. It's hard to overstate my satisfaction.

[@fugallik]

and now, go make some new disasters, that's what I'm counting on...

[@justarandompally]

aperture science we do what we must because we can

[@anotherbacklog]

For the good of all of us Except the ones who are dead

[@NezzConstantine]

But there's no use crying over every mistake.

[@ngraner421]

You were a world class science educator, you are now also a world class entertainer. Thank you for your work.

[@NeonNijahn]

Bowth!

[@Torgo-and-the-Lucifer-Cat]

Had to look at Sabine twice. And again. 😊 As doctor Seuss said, "a portal that's red, a portal that's blue, not any kind of portal will do!"

[@jacktheripper777b]

Did anyone manage to pay attention to the theoretical part? I had never been "excited" by Physics before... Very good, my teacher.

[@user-we1ue3fl5h]

I bought Portal-2 for my nephew when he was just in the 4th grade, because I wanted him to think three dimensionally. He mastered it quickly. Now several years later, he just completed his PhD in Physics. I'm hoping this game played a factor in expanding his mind and influencing his love of STEM.

[@CarlBach-ol9zb]

Bruh? Doesn't everyone already think in 3D? It came with ya' fucking mind

[@ckmishn3664]

"Several years"? How many grades did he skip? Because that should have taken at least 16 years if he didn't skip anything (and Portal 2 came out in 2011).

[@bengal_tiger1984]

How'd he get his PhD already? If he was in 4th grade in 2011 (when it came out), people are usually aged 9-10 years old then, so he'd be 21-22 right now. That's the age people are in their final year of undergrad.

[@siddharthb2633]

I wouldn't have understood portals without that costume.

[@osmosisjones4912]

It's finally completed: kzbin.info/www/bejne/oIOYfWBmZ9CcfLc

[@MOSMASTERING]

​@@osmosisjones4912What the hell is this video? Its a recording in a crappy phone, of a youtube video, then reposted... ? Seriously, the audio is incomprehensible

[@Spiegelradtransformation]

The Theory of Everything have to explain a hinge.

[@Adam-zt4cn]

@@MOSMASTERING It is a bot, you can see ones just like this in basically every comment section. They are doing it to trick the KZbin algorithm into thinking people want to watch and share the video, and make it appear more popular than it should be. Possibly to get more ad revenue.

[@Kirschbaumleiche]

Dear Sabine, I really did enjoy your analytical approach to pop culture from a scientific point of view. Could you see yourself doing more videos of this kind? It is very intriguing to watch you philosophize about Portal in a deeper level

[@dwaynesievers1397]

OMG!!!! Sabine!!!! That was amazing! AND, looking the way you did…(CGI? Body suit?! wig?) it was very hard to concentrate on the actual content of the video! I’m 58 and not very tech savvy, but very interested in physics my entire adult life. I love your content! Anyway, this one blew me away. Keep up the GREAT work!

[@takanara7]

It's a body suit.

[@pig0r]

Sabine, you're becoming my favourite scientist/science communicator. I love the way you explain things while stating your personal opinion on the matter.

[@mrmidnight8975]

The costume, the wig, the toy guns... Hallmarks of a dedicated physicists ❤❤❤❤❤

[@gastube22]

Thanks for the love, Sabine x. And for the video. Not forgetting the science, too. Always wonderfully engaging.

[@user-vf2vg5ko8b]

WOW! Cosplay & Physics! Love it Sabine!!!😍😍😍

[@MartinX333]

It turns out GLaDOS' full name was Caroline Hossenfelder.

[@dydowicz]

I wanted to give you the thumb up, but it won’t be the 137 anymore.

[@itromacoder3088]

She carolines mother

[@danielh.9010]

​@@dydowiczwhat's so special about 137?

[@RonaldoMessina]

@@danielh.9010 google "fine-structure constant" and you'll know

[@dydowicz]

@@danielh.9010 Oh, so you are not a physicist. You can easily find out on your own online, it’s the one of the most well known numbers in physics.

[@napotronix]

OK, Sabine in a skin tight Portal cosplay suit wasn't on my Bingo card for 2024. Glad my wife didn't walk in forcing me to mumble something about 'science show'.

[@diamondthree]

😂

[@RickSjoerds]

That was an unexpected twist to the video! Great vid, Sabine! Loved the cosplay 👍

[@ducklaser]

Better than a lullaby. Goodnight, Sabine, and thank you.

[@joaogabrielfernandeszenobi3752]

I freaking love this woman

[@Triquatra]

The best!

[@profusemoose1488]

Sabine calling the game "Portals" is such a perfect version of grandma asking if you had beaten "pokeymans" yet lmao.

[@BinaryFreak]

Still better than not asking at all.

[@DragoNate]

sure puts a smile one's face :D

[@NeostormXLMAX]

i mean after her video on economics, i really think the cracks are starting to show, and she really seems to me no different than those ai grifters who pose as a much higher level of expert than they actually war

[@phenel]

@@NeostormXLMAX are you saying you think she's actually a dumbass pretending to be a smart woman because she made a mistake in another video?

[@jed1nat]

@@NeostormXLMAX Well that was a leap.

[@patriktschersich7502]

Sabine, you outdid yourself, this video was just damn hilarious and genious! I love it.

[@Loop44]

i hope you're continuing research on portals and wormholes also you look very nice in that suit

[@Redrogue4711]

This is synchronicity at it's best. I played both games for the first time during the past week and got hooked. Then this shows up. For games that old. Unbelievable.

[@y5mgisi]

I love a good synchronicity.

[@erikziak1249]

3:00 Objection. Terminal velocity. You fall through air. Turbulence will occur. The air in the closed system (room) will eventually stop your acceleration, you reach your terminal velocity, dependent on the air flow in the room. You falling forever through the portals will just heat up the room, even if slowly. When the room has nowhere to radiate heat, it will heat up forever. I expect that you would die of thirst long before the room heats up to any uncomfortable level, as the energy added into the system by your body falling down is rather small.

[@EnjoyPA]

Came here to say this.

[@tommig3]

In the game itself I thought that air would start flowing through the portal in the same way that everything else would so you'd be in a column of rapidly accelerating air however in Sabines (superb) vid none of the air would have enough kinetic energy to traverse the portal against the different gravity so i suppose as you jumped through the portal you'd feel an additional push. Another thing though... nerding up a bit more here... air pressure between the ceiling and the floor would have a larger influence than gravity so perhaps the pressure of the air at floor level would force the air through the portal causing the column of rushing air to occur?

[@Mecharnie_Dobbs]

​@@tommig3 The pressure difference between floor and ceiling isn't that great, and wouldn't it soon equalise once they were connected?

[@tomtomminger6227]

Thanks for this amazing video. i loved the Portal games, now even more with the scientific context given by you.

[@gmenezesdea]

Great video. I played the hell out of both games back in the day. Can't believe the first one came out almost 20 years ago.

[@almac4067]

This might not win you a Nobel prize but you just appreciably increased the happiness of humanity. Good work!

[@Artopiumcom]

THIS is why Sabine has the BEST science channel on YT!!!

[@PecoraSpec]

i mean, I already loved you, now this nerdiness is quite amazing.

[@shuckieddarns]

I like you. I too spend my time pondering likely unhelpful scenarios of physics, like whether there's a situation in which higher-pressure forms of ice can possibly continue to exist at STP (unlikely).

[@brianmcguinness9642]

Larry Niven wrote an article on this called "Exercise in Speculation: The Theory and Practice of Teleportation" where he discussed this sort of thing. It was published in his story collection All The Myriad Ways in 1971.

[@mesabimike8123]

along with a speculation of Superman's sex life. "Man of Steel.....Woman of Kleenex"

[@brucegoodwin634]

@@mesabimike8123 Niven Nerds Unite!

[@brianmcguinness9642]

@@mesabimike8123 That was a fun article.

[@ladislavondrejicka682]

I almost dropped my phone. Never ever thought I see this. 😁

[@timberwoof]

Into a portal?

[@patthegunsmith]

My dear, you have outdone yourself with this one. Mesmerizing.

[@jordanjackson6151]

This video is so above the integrity of click bait, that it actually starts out with what the thumbnail and title is advertising. And actually stays interesting. I'd been subscribed for a while. But this is very well placed to where I could show it to some friends and they'd be hooked. Which I'll probably do next time I see them....

[@ChielScape]

This video was a great excuse to wear your sci-fi suit, wasn't it? 😂

[@2adamast]

Must have worked on her weight for months and wearing the suit is the excuse

[@SabineHossenfelder]

indeed!

[@fransahm1956]

@@SabineHossenfelder What ever you did ... it's working ;)

[@CCRoselle]

@@SabineHossenfelder IIRC ...Mother of TWINS! and a marathon runner... and some other minor stiff on her CV.

[@timberwoof]

Who needs an excuse?

[@paulbennett4548]

Absolutely loved it, the good Doctor once told me 'be serious about what you do, but not necessarily in the way you do it'

[@louisgiokas2206]

Epic! This reminds me of my student days in the third quarter of the last century of the last millennium. We didn't have video games, but we did have science fiction books. Actually, there was a collection of them in bathroom, just in case one needed a good read. I am sure we analyzed wormholes at the time.

[@rampagingshark]

I love you talking about this topic!!! More!

[@justlisten82]

Hard to focus when I'm thinking "damn she's looking hot in that outfit" Kudos Sabine

[@troleary]

You look stunning . I didn’t hear a word at the beginning. Need to rewind !!

[@jasont7866]

I've been thinking about the game portal since ive been playing it a few years back ,with how the momentum conservation works and what would happen if you put portal at the ceiling and floor; I knew it wasnt gonna work like the same as the real world but its an interesting thinker to solve! Thanks for explaining it more further, Sabine!

[@neilb1619]

Sod the Physics. I stayed for the costume! Much more like this please, Sabine.

[@detocquevi11e]

I always hypothesized that Sabine was fit. Today, hypothesis confirmed.

[@Hirsbrochannel]

indeed

[@TactileTherapy]

i need more hands-on research to confirm

[@mroracle464]

Don't be gross ​@@TactileTherapy

[@thesenamesaretaken]

​@@mroracle464 no, no, I think he means to try something physical, not biological.

[@mroracle464]

@@thesenamesaretaken oh, if that's the case then my bad

[@noizW]

Sabine is one of the funniest humans I've ever "seen" - and they say Germans don't have Humor. I love her Charisma

[@temanor]

From what I remember, the portal gun was a "quantum tunneling device", meaning it didn't use wormholes.

[@flastable9842]

I love the uniform and the portal guns. And I learned sone new physics. This channel is awesome. 😎

[@ChrisBrown-iu8ii]

Dang Sabine, I don't know what you do to keep in shape but keep it up because it is definitely working.

[@klichmichael1442]

Her energetic, serious gesturing with the weapons is hilarious. Science communication triple plus.

[@jacob.tudragens]

Her grip on the pew pews is 'triggering' me!

[@johnsmith-kc1sn]

Note fingers on the triggers at all times. Sabine is ready for action.

[@ceasarperez6246]

This is amazing Sabine. As a child before i thought so logically and became inspired by the mathematics of the universe i was obsessed with this game just as a game. Not an homage to portal physics. Seeing you share such a similar interest as me as a child is amazing. You are so young at heart!

[@RubeusArchos]

Love how you took two things I like and made it fun but I am learning something.. by the way you getup is awsome.. you should do more videos like this..

[@okman9684]

Sabine is getting more and more crazy every day and I'm here for it. And love the cosplay

[@fabiopaolobarbieri2286]

I write comics and fanfics, and you've given me a whole lot of story points, some of them hilarious.

[@larryburford1871]

I mostly manage to stay awake for your stuff - I grok your skeptical take on things For this episode, your costume was an additional boost ; - )

[@joebloggs8814]

"... it gets nasty when you try to figure out *when* a portal opens [because time travel]" You should try the Portal-inspired game Gateways! (later in the game you get the time-travel gateway gun and the puzzles get tricky!)