The Truth About Toilet Swirl - Northern Hemisphere

  • Опубликовано: 3 июн 2015
    Both videos on one page (for desktop):
    Subscribe to Veritasium:
    ↓↓↓↓↓↓↓More info Below ↓↓↓↓↓↓↓

    Some notes about this.
    We each repeated the experiment 3 times, and got the same results every time. For those of you who might be skeptical, great! The good news is that right circularly prismatic kiddie pools are only $10 and you can do the experiment for yourself at your latitude. There's really no reason you shouldn't do this on your own, so before you criticize how we've done it, I'd strongly encourage you to do it for yourself.
    Smarter Every Day Instagram:
    Patreon Support Link:
    Veritasium on Instagram:
    Patreon Support Link:
    Gordon McGladdery did all of the sound design for the video. We used two songs from other artists (licensed of course). Derek split the first one up so it fades from video to video, and Gordon split the instruments up on the second one. There are violins on one video and percussion on the other for example. It's really neat.
    The neat earth animation at the beginning and the synchronizing timer was made by He also made still images of the earth from the top and the bottom.
    Thanks to Jacob Vehrs for helping make the plywood pool platform.
    There was a study performed at MIT years ago ( that explained the physics involved. We repeated some of these demonstrations, but on opposite sides of the globe…and in a way that can be easily understood.
    This site is a great resource on the Coriolis effect and ways people have gotten it wrong:
    The Coriolis Effect influences the flight of a bullet.
    We would love for someone to replicate this demonstration. Please tweet your results to us @SmarterEveryDay and @Veritasium.
    Here's the link to puchase the exact same pool:
    Tweet ideas to me @SmarterEveryDay
    The thought is it will help educate the world as a whole, and one day generate enough revenue to pay for the kids' education. Until then if you appreciate what you've learned in this video and the effort that went in to it, please SHARE THE VIDEO!
    If you REALLY liked it, feel free to pitch a few dollars towards their college fund by clicking here:
    Warm Regards,
  • Наука и техникаНаука и техника

Комментарии • 6 108

  • Willie Koorts
    Willie Koorts 23 часа назад

    How cool is that! Two guys I'm subscribed to, doing a totally controlled experiment together, with an awesome result, challenging another guy who I'm also subscribe! Great video guys, particularly when playing them synchronised! I suspect you are correct, this has not been done on the internet before! Keep up the great work!

  • Engineering Nerds
    Engineering Nerds 2 дня назад

    It's good better go to country like keneya on equator so that you dont have travel much 😀and just shift your direction little to have three different cases. People have done it. Exactly on equator no swirl water goes straight in.

  • Franny Ward
    Franny Ward 3 дня назад

    I should show my Nephew the "Flat Earther" believer. He still probably say it was somehow staged.

  • Prashanth K S
    Prashanth K S 4 дня назад

    Now this is one incredible pair of videos. No wonder you both are my fav youtube creators!
    What I'd love to see now is you both team up with Physics Girl and get her to do the recording right on the equator. Now that'll be something, ya?
    ...just that I don't want to wait 5 years now for the 3 of you to sync up. And I'm wondering about the logistics of playing 3 videos side by side by below??
    Ooo... lookie, while you both were making synchronized videos, here is my synchronized comment! Clicking the comment button in 3..2..1..

  • JT McAwesome-Face
    JT McAwesome-Face 5 дней назад

    haha this was awesome

  • Ted Grassman
    Ted Grassman 6 дней назад

    This is probably the craziest thing I've ever seen on RUclip! My mind is blown! How come I only discovered it now? Must be the normal-looking title, hiding one of the most original and well edited dual-video experience :D
    Well done, sirs!

  • ap koiv
    ap koiv 7 дней назад

    Veritasium video: 2,424,228 views
    SmarterEveryDay video: 2,641,421 views
    At least 217,193 viewers are rebels and don't adhere to the rules. Go you. Yea... SMH

  • Rassel  Qayum
    Rassel Qayum 11 дней назад

    I'm new to this channel its very good

  • Matt Pipp
    Matt Pipp 12 дней назад

    How would you go about making your pool sit perfectly to eliminate all/any variables?

  • Imortal Flame [VIXLE]
    Imortal Flame [VIXLE] 12 дней назад

    I’m not getting smarter every day

  • Game X posure // GXP
    Game X posure // GXP 13 дней назад

    That thumbnail is creepy

  • George Praisehim
    George Praisehim 16 дней назад

    I was really trying to get both videos streaming at the same time but could not. Very disappointing though because the other video did not have a RUclip link only through Facebook so I literally had to look up this video by name in order to find it it wasn't even linked underneath when I watched the other video. Too bad RUclip is not on the same page with you guys

  • T S
    T S 22 дня назад

    I just realized, Destin used “meter” and Derek used “foot”

  • sometimesgood
    sometimesgood 24 дня назад

    This was A-W-E-S-O-M-E!!!

  • Adam W
    Adam W 25 дней назад

    And what about the valve? It opens to left so it makes pressure on this side. So whirll is left turn. If it would be right opener it may whirl in right side?

  • Blockistic
    Blockistic 26 дней назад

    But how many trials did you do?

  • Daniel Lancaster
    Daniel Lancaster 28 дней назад

    Just WOW!

  • Curtis Scott
    Curtis Scott 28 дней назад

    Simpsons: Bart vs Australia...

  • Moonstruck Exploring
    Moonstruck Exploring 29 дней назад

    Of course its real! I went to Australia for a year and have seen sinks and toilets all drain the opposite way. Take your kiddie pool to Perth Australia and test it there too.

  • JohnnyG
    JohnnyG Месяц назад

    Seriously? ;-)

    OMG OMG Месяц назад

    Synced video:

  • almarjyou
    almarjyou Месяц назад

    i dont get the sync.

  • Shad Stewart
    Shad Stewart Месяц назад

    He doesn't pull the plug so he can get accurate results lol. Then proceeds to drop die several times in a pattern that promotes a counterclockwise motion lol and you all believe it. notice his drops push the water off center to the right or counter turn of the drain all four times and again second before they claim a counter clockwise motion.

  • Hentie Loots
    Hentie Loots Месяц назад

    In science tests should be run multiple times, and the results repeatable. One test does not a fact make. Like you said, and I have confirmed this in other videos on how toilets are made and how they work, toilets have jets and different designs that influence the direction of water drainage. In the grand scale of things, the size of that kiddy pool is like a pin prick on the surface of the earth. There is no way the movement in a 2 meter diameter, can be so different as to cause this. Also, if you look on, more often than not you'll see multiple storms, be it south or north of the equator than turn in different directions.

  • M Alina
    M Alina Месяц назад

    You guys are cool!!!

  • Mike 1
    Mike 1 Месяц назад

    Best idea ever

  • Ben Roberts
    Ben Roberts Месяц назад

    You should do this on the equator.

  • Phil Protheroe
    Phil Protheroe Месяц назад

    Now drain a pool on the equator

  • Tricken87
    Tricken87 Месяц назад

    I know this video isnt new but that was still cool watching both synced videos like that.

  • Mustafa Süzen
    Mustafa Süzen Месяц назад

    This is really good work. I never seen any video like you do. I subscribed both of your channels. Can you make more sync videos?
    This two sync videos are pretty awesome, like watching one video in two separate monitors.

  • ian adams
    ian adams Месяц назад

    Brainwashing to the globe

  • Abe Alaniz
    Abe Alaniz Месяц назад

    Really cool! Can you try it with the valve turned so the water begins to flow from the opposite side inside the pipe? Because I wonder if the fluid dynamics start the swirl inside tube to influence the direction of the draining. I also wonder if the length of the pipe influences the spin direction?

  • Samuel Fend
    Samuel Fend Месяц назад

    These videos should actually have the same amount of views

  • DWS Outdoors
    DWS Outdoors Месяц назад

    I just seen this now and you guys get an A+ for making science as cool as this collaboration is! My inner nerd was giggling with excitement with how good the synchronization was!

  • Alexander Balesini
    Alexander Balesini Месяц назад +1

    Haha, I have the exact same comment on the other side!

  • Funk Obama
    Funk Obama Месяц назад

    there is no coriolis.........I've got several drains upstairs and down several go different directions upstairs and down.

    PHSL KSA Месяц назад

    this is awesome !

  • Greyskyy151
    Greyskyy151 Месяц назад

    So awesome with two monitors! i love the synced video! very cool!

  • Brandon
    Brandon Месяц назад

    What about sample size, Is it repeatable?

  • Nick Ellermann
    Nick Ellermann Месяц назад

    I did this on my dual monitor setup, really cool!

  • crazy observations
    crazy observations Месяц назад

    If its coriolis effect shouldn't the water turn even when its not draining?

  • Xanthopteryx
    Xanthopteryx Месяц назад

    That's not the correct explanation of how Coriolis effect works.

  • gab Macpro
    gab Macpro Месяц назад

    Avez-vous vérifié si la piscine était au niveau parfait ?
    Have you verified if the pool was at the perfect 0°degree level ? because it's a big mistake if it hasn't be done !

  • Evan Parker
    Evan Parker Месяц назад

    i really like the 2 video experiment. it's like playing pink floyd and watching wizard of oz on the other side

  • Eddie Luttrell
    Eddie Luttrell Месяц назад

    I like Drink from Vebistrabidum

  • Aleksy Gaming
    Aleksy Gaming Месяц назад

    You can see that earth is round not Flat

  • Sir_Tactical_Slime
    Sir_Tactical_Slime Месяц назад

    1:20 sounds like halo reach

  • Luminescent Lion
    Luminescent Lion Месяц назад

    with 2 monitors it looks epic

  • Shawn Sutcliffe
    Shawn Sutcliffe 2 месяца назад

    would this pool with the equator running right through the middle of the pool drain with no swirl at all?

  • Jose Luis Castaneda
    Jose Luis Castaneda 2 месяца назад

    won't the side which the valve opens generate an uneven directional force while draining which could affect the way of the rotation?

  • pakaibil
    pakaibil 2 месяца назад didn't do it in the "south 'hemisphere'" but that proves whatever you want to prove....phony

  • C jest
    C jest 2 месяца назад

    can you please tell me why the tropical revolving storms recurve to east after initial movement to west once it reaches around 20 to 25 degrees north ?

  • ankush saini
    ankush saini 2 месяца назад

    both of you..... !!!!!!... seriously

  • Juan David Santamaría Sánchez
    Juan David Santamaría Sánchez 2 месяца назад


    BIG DOGE 2 месяца назад

    So cool!!!

  • George Mason
    George Mason 2 месяца назад

    Fun idea but idk how I'm supposed to play both of these at the same time given that your device will only allow 1 youtube window open at a time, and automatically stops videos when you hit play on another.

  • Debmalya Mukherjee
    Debmalya Mukherjee 2 месяца назад

    Your view count and likes and dislikes numbers are also close..What a coincidence!..And I was already subscribed to Derek's channel.,Loved it.

  • mickavellian
    mickavellian 2 месяца назад

    OK .... I have been in Brazil and New Zealand and the first thing I tried was flushing the toilets. BOTH flushed clockwise, As far as "science" Degrasse Tyson claims this clock/counter flushing is a myth and it all depends on the design of the toilet.
    I SAW IT , Degrasse Tyson confirms it.

  • Gary Koons
    Gary Koons 2 месяца назад

    I would have at least clean my toilet first!

  • Raider Horse
    Raider Horse 2 месяца назад

    Checking for if you can see my comment on other side

  • Kyle Riley
    Kyle Riley 2 месяца назад

    That was super cool. Great job guys.

  • Bishop Racicot
    Bishop Racicot 2 месяца назад

    we want more

  • Connor Freeman
    Connor Freeman 2 месяца назад

    What If you have a drain on the equator

  • 1brennon11
    1brennon11 2 месяца назад

    Wow that sync was amazing!

  • Hyacinthe1969
    Hyacinthe1969 2 месяца назад

    Great job guys! Thank u both for ur efforts to help teach the world! :)

  • Sani R.
    Sani R. 2 месяца назад

    whole video(s) gave me chills.. i felt very sciency aligning to videos and sync it. awesome video(s).

  • Mostlyharmless1985
    Mostlyharmless1985 2 месяца назад

    I see what you did there, using metric units in the us, and imperial units in australia...

  • Dan L
    Dan L 2 месяца назад

    Destin, I need your help.
    I live in the northern hemisphere. 3600 miles north of the equator. In my garage I have 2 side-by-side sinks. If I fill them both up, let them settle and pull both plugs, they both drain in OPPOSITE directions. Can you explain why please? Thanks.

  • slaptoad
    slaptoad 2 месяца назад

    Hello from the other side, I must've subscribed a thousand times

  • Christophoro Baggins
    Christophoro Baggins 2 месяца назад

    Hey I’d love to see you guys test the curvature of the earth, the coreoils effect, gyroscopes, and flat earth theory. You guys do a great job. I wouldn’t give this flat earth stuff a thought but for all these professionals coming forth saying there’s no way the earth is a sphere or has curvature. Thanks!

  • jtuno122
    jtuno122 2 месяца назад

    You didn't prove anything. The experiment needs to be repeated with the same results every time.

  • Ju ch
    Ju ch 2 месяца назад

    Marvelous executed

  • Ziggurat XYZ
    Ziggurat XYZ 2 месяца назад

    That synchronisation experiment was absolutely fantastic.

  • possessedllama
    possessedllama 2 месяца назад

    I love how you have to watch these together for all of the narration to sync up - and the synced "wish me luck" "good luck" bit :)

  • Nitish Srivastava
    Nitish Srivastava 2 месяца назад

    What if I’m already happily subscribed to both of you?

  • That one Moon Base Alpha player
    That one Moon Base Alpha player 2 месяца назад

    Why not try it at the equator

  • A. Cesário
    A. Cesário 2 месяца назад

    Amazing video! Congrats.

  • Khalis Suhaimi
    Khalis Suhaimi 2 месяца назад

    BOTH OF YOU GUYS....(go to derek's video to see the rest of the comment)

  • Gavin Martin
    Gavin Martin 2 месяца назад

    Say nh is left side of a road and sh is right side of a single road. The sun and moon move in the middle in one direction. The sun or moon or both are pulling the water in the same direction causing opposite swirl. Theres ur alternate reason. A youtube user posted a video showing a cue ball always leaning to one side in relation to n/s positioning of the pool table. Says its the coriolis effect. I asked him to replicate in more than one setup. Guess removed. Subject Was about nimrod giants strangely.

  • Jackson Large
    Jackson Large 2 месяца назад

    I synchronized them perfectly!

  • Nadesmond
    Nadesmond 2 месяца назад

    ok wait wait i have two 50" screens let's synchronize!

  • *User.Aaron*
    *User.Aaron* 2 месяца назад

    Where you at Northern flat-earthers

  • Samuel Langweil
    Samuel Langweil 2 месяца назад

    Can I mention how the American used the European measurement and the Australian/Canadian used the American measurement?

  • Jack Fredricks
    Jack Fredricks 3 месяца назад

    This video has more views but fewer up votes and a few more down votes.

  • josorr
    josorr 3 месяца назад

    At the time of this post, (10:15p.m. CST January 13 2018) Derrick (Veritasium) has 2,353,129 views and 64,458 likes. Destin (SmarterEveryDay) has 2,593,141 views and 63,781 likes. So, Destin has more likes, but Derrick has more views

  • DiGiTaL CuRReNCy Crypto Tips
    DiGiTaL CuRReNCy Crypto Tips 3 месяца назад

    amazing video's and its just proof about the toroidal waves and magnetism being a fundamental key of life. Its weird that i see so many similarities between this shape and lots of things in life like religion but also why we have stronger connections with random people then others... because we all are a toroidal is some form and some stronger then others.

  • Sastkryptlox
    Sastkryptlox 3 месяца назад

    Incredibly awesome idea - one of the best RUclip collabs I have ever seen!!

  • dylan casto
    dylan casto 3 месяца назад

    You did not eliminate all the variables, did you check to make sure the pool was level or the type of metal you used

  • General Incredible
    General Incredible 3 месяца назад

    885 flat earthers disliked.

  • Its Dextrin
    Its Dextrin 3 месяца назад +1

    Dying Children in Africa could have used that water......

  • Anand Viswanathan
    Anand Viswanathan 3 месяца назад

    The sync was too good. The amount of effort is unbelievable

    YASH RAJ SHARMA 3 месяца назад

    the best thing i've watched on internet

    MATTER OF A FACT Jones 3 месяца назад

    White people are f n weird as they think they are times a trillion

  • John Doesitintheair
    John Doesitintheair 3 месяца назад

    Lol, world is still flat... flat earth retards?

  • Anthony A.
    Anthony A. 3 месяца назад

    How come I didn't know this

  • Tim Cunningham
    Tim Cunningham 3 месяца назад

    My dual monitor setup with Destin on the left and Derek on the right was insane!

  • Angelo Parodi
    Angelo Parodi 3 месяца назад

    Didn’t sync them😪

  • Gregory Paul George M
    Gregory Paul George M 3 месяца назад