The Truth About Toilet Swirl - Northern Hemisphere

  • Опубликовано:  2 года назад
    Both videos on one page (for desktop):
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    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.

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    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
  • Длительность: 8:02
  • Smarter  Every  Day  Science  Physics  youtube edu  Education  Math  Smarter Every Day  experiment  nature  demonstration  slow  motion  slow motion  education  math  science  science education  be smart  edu science  what is science  Physics of  projects  experiments  science projects  coriolis effect  toilet swirl  australia  Coriolis  Fluid Dynamics  

Комментарии: 5 815

  • Yuanyuan Qu
    Yuanyuan Qu Час назад

    this is cool.

  • bonsaiforu
    bonsaiforu 2 дня назад

    I will.

  • Andre Feliciano
    Andre Feliciano 2 дня назад

    AWESOME Video collaboration is soo dope

  • Greg Esterlund
    Greg Esterlund 4 дня назад

    If the earth is spinning at around 700 to 1000 miles a hour, depending where you are, why can't the affect be seen outside of the car also?
    I always believed that the electromagnetism of the earth and the "left hand rule" come into play with the spin?
    Great channel, thanks

  • John Morris
    John Morris 4 дня назад

    Is it just me or does anyone else not like the look of the toilet swirling clockwise? It's like an oddly unsatisfying compilation.

  • ElzearYoung
    ElzearYoung 5 дней назад

    who else has seen the movie Escape Plan?

  • ElzearYoung
    ElzearYoung 5 дней назад

    this collaboration made me subscribe to SED and unsubscribe to Veritasium. hit and miss

  • Eli S
    Eli S 5 дней назад

    The sync thing is so cool.

  • Jacob Eiden
    Jacob Eiden 7 дней назад +1

    what about a pool on the equator?

  • NeenanTheNinja
    NeenanTheNinja 7 дней назад

    This is why...


  • mafarnz
    mafarnz 7 дней назад

    Really cool guys, this collaboration was a lot of fun to watch!

  • Accumulator1
    Accumulator1 7 дней назад

    This vid is BS. Toilets spin cw in the Northern Hem. unless otherwise influenced by the toilet design.

  • Robert cc
    Robert cc 8 дней назад

    The real question to answer is: When drunk and you get the spins, does this apply? Also is there somewhere in the middle where you would not spin. If so there is where to open my bar! Lol

  • Therealrobokaos
    Therealrobokaos 9 дней назад

    Since I had a video on each of my screens, when you guys switched at the end it just made you walk across my screens

  • Alex Poole
    Alex Poole 10 дней назад

    The water in my toilet doesn't swirl :(.

  • goku21youtub
    goku21youtub 12 дней назад

    Ican make it turn both clockwise and counterclockwise , location germany ...

  • Frankie Prokop
    Frankie Prokop 12 дней назад

    I also got to see stillness on the Equator.

  • Frankie Prokop
    Frankie Prokop 12 дней назад

    I was actually in Ecuador over the summer and went to the equator and got to see different swirls on either side of the equator.!

  • Outta Promotions - E.A.A (LTD) UK & WORLDWIDE

    gravity? ??

  • Kevin Mcgovert
    Kevin Mcgovert 18 дней назад

    Probably one of the best videos Iv seen! Digging the collaboration !!!

  • Pol Verdaguer
    Pol Verdaguer 18 дней назад

    Really cool video!

  • GamingDominari
    GamingDominari 20 дней назад

    I can't sync the video on a fun >:(

  • Two Wheel Aussie
    Two Wheel Aussie 20 дней назад

    So what happens when a cyclone try's to cross the equator? Does it straight away spin the other way or does it stop?

  • ano nymus
    ano nymus 21 день назад


  • Clickpn
    Clickpn 22 дня назад

    i just wanna say that i NAILED the sync. NO LAG

  • cochiselol1232
    cochiselol1232 22 дня назад

    I never realised how fucked up it would feel to look at water spinning the wrong way

  • GhostranGaming
    GhostranGaming 24 дня назад

    This vid was amazing

  • Sasquatch McMuffin
    Sasquatch McMuffin 25 дней назад

    But what way would it drain if you put the center of the kiddy pool on the equator?

  • Shrek
    Shrek 25 дней назад

    Lies, i live on the equator and my toilet goes straight down

  • Quero
    Quero 26 дней назад

    How about the hair swirls? :)

  • Univentures UT
    Univentures UT 26 дней назад


  • Univentures UT
    Univentures UT 26 дней назад


  • Matthew Britton
    Matthew Britton 27 дней назад

    Hi Destin - does the direction and/or rate of flow depend on the relative position of the Earth's wobble? This affects atmospheric things that ultimately affect macro-geographical things like the Sahara Desert, but does it affect local things like toilet bowls?

  • venomjuker
    venomjuker 28 дней назад

    Who actually have it in sync? This is awesome! The parts where they keep quiet are the parts where the other video starts talking!!!

  • antonio garibay
    antonio garibay 28 дней назад

    what If your on the equator??

  • Ian Richardson
    Ian Richardson 29 дней назад

    Physics! My favorite spectrum of science!

    • Ian Richardson
      Ian Richardson 29 дней назад

      Mainly because all other sciences rely on it. ^v^

  • anthony halstead
    anthony halstead 29 дней назад

    Bring this expiriment to the equator and make 2 and put one on both sides and see if they swirl different

  • millertas
    millertas 29 дней назад

    Prof. Brian Cox said it was a myth BUT Michael Palin in his TV series 'Pole to Pole' showed a man on the equator in Kenya demonstrating the affect.

  • Xptechmike nosehairextractorguy
    Xptechmike nosehairextractorguy 29 дней назад

    Their test was inconclusive. They didn't have enough variables. If they had Five kiddie pools one of him may have inadvertently began turning in the opposite direction. Where one direction may be a default, it wouldn't have taken much to get it going in the other direction from a stopped starting position.

  • zhibro gamebro
    zhibro gamebro Месяц назад

    WOW now i convince its true,before i see this vid my belives and disbelive is 50/50

  • H2TA
    H2TA Месяц назад

    looks good with dual monitors

  • shutemdwn
    shutemdwn Месяц назад

    Ok that was cool how you synced the two videos. Do some more of that!

  • justin hyland
    justin hyland Месяц назад

    This is an amazing video! good idea on the synchronous videos as well.
    Ive knew about the Coriolis effect, but this experiment is an awesome illustration.

  • Max Ducke
    Max Ducke Месяц назад

    It was way too much for my mind to process.

  • xXE4GLEyEXx
    xXE4GLEyEXx Месяц назад

    ... an amazing idea!

  • Haikal Gaming
    Haikal Gaming Месяц назад

    this left

  • B Rice
    B Rice Месяц назад

    Cool idea, guys!

  • Felix s
    Felix s Месяц назад

    pair of frickin pole vaulters.

  • Brandon Lewis
    Brandon Lewis Месяц назад

    If the earth is spinning it's going faster than the speed of sound at the equator. So if there is momentum, which should cause an immense force. Not just affect water draining lol that causes Coriolis there must be centrifugal force as well. And we should be flinging off the earth. But I guess there's this mythical force called gravity. the earth is so BIG is bends nothingness creating a force that adjusts to everything independently on earth lmfao insane.

  • ZEM pro.
    ZEM pro. Месяц назад

    this was a really cool idea! itss awesome how you guys managed to synchronize the videos perfectly!

  • Robert Graff
    Robert Graff Месяц назад

    First off: cool synchronization! Second, my friends wanted me to film a toilet flush when I visited Australia, but it was hard to tell if there was any change (probably none though) - wish I had thought of food coloring...genius.

  • Mr. Crumb
    Mr. Crumb Месяц назад

    how many times did you do the pool experiment? you show in the beginning how to stagnant sinks can be randomly drained differently. therefore I hope you guys didn't just do one try if it's a 50-50 chance like you suggest in the beginning

  • Jeff Forsythe
    Jeff Forsythe Месяц назад

    awesome videos thanks

  • Querez854
    Querez854 Месяц назад

    Can't syncronize on phone :/

  • Eden Youtuber
    Eden Youtuber Месяц назад

    mine does not even swirl lol
    by the way i dont live on the equator i live in the usa

  • Charlie Flor
    Charlie Flor Месяц назад

    This was so...

  • Sasha galkina
    Sasha galkina Месяц назад

    Sow if you throw coin in the air ones that will be evidence of what
    exactly? what if 10 times? it takes thousands of times to see chance
    50/50. What if there is other explanation of
    Swirl water? Do you aware that people can find cables, water stream underground with bend metal sticks holding in their hands? Aha that means there is activity under ground that effect 90 degree bend stick that you hold in your hands. Can it affect water to swirl at certain direction?
    Can water and air swirls be affected by flying in circle over flat earth son? Right under son is hottest spot and son fly around always at the same direction. Can that moving spot of heat influence movement of air? hot air goes up cold goes down closer to centre swirls at one side and in other side closer Antarctic ring swirl too other side.
    Are you still lathing about how easy you can be convinced about stuff? Because I did not finished to mention all variables that have impact on swirl I leave it to you :O)
    Hey dummy have you anything in your head? No? Nobody home? Good, because intelligence is ability to observe with empty head with out judgements see the truth as it is

    So how many variables we can not observe and there for don't see whole picture?

    How about line of equator? It fits perfectly on flat earth circle line under the son, but it does not fits ball because according NASA globe is tilted on one side ...

    I like that flat vs globe fight did you noticed that we learn something every day ?

  • Kenny Arias
    Kenny Arias Месяц назад

    2.4 M views here
    2.2 M views on veritasium
    200k people didn't get it v:

  • River Styx Armory
    River Styx Armory Месяц назад

    extremely long range shooting can really show off the Coriolis effect.

  • Richard Waskiewicz
    Richard Waskiewicz Месяц назад

    That was awesome! :D :D

  • aliseraj28
    aliseraj28 Месяц назад

    but my toilet doesn't swirl it goes back wards

  • Trigon Playz
    Trigon Playz Месяц назад

    3:30 google chrome

  • jason of the disbury family
    jason of the disbury family Месяц назад

    Dont listen its fake the conditions are not the same the Container has to be the same and the plug hole has to be the same the water has to be put in the same the conditions were not the same FAKE FAKE

  • Amber Ridgdill
    Amber Ridgdill Месяц назад

    So then what happens directly on the equator?

  • The Big Pickles
    The Big Pickles Месяц назад

    Awesome. well done guys.

  • Sharon Hunter
    Sharon Hunter Месяц назад

    42.448.. it swirls clockwise! Southern Oregon!!

  • Zyga Sokól
    Zyga Sokól Месяц назад

    This test is not showing anything.

    It should be repeated many times and with the same pool with similar conditions, not two different pools.

    I'm not saying the test is wrong because it's very interesting but we only can watch cutted clip, not the whole uncuted and unedited video so...

  • mvcorse1
    mvcorse1 Месяц назад

    once u said the earth is spinning this became science fiction

  • Exner's Range
    Exner's Range 2 месяца назад

    awww that was very cool!!!!!!!!!!!

  • Nithar Shana
    Nithar Shana 2 месяца назад

    that was....

  • KitKatinBama
    KitKatinBama 2 месяца назад


  • ᚲᚨᚢᛚᛞᚱᛟᚾ ᛃᛟᛏᛁ
    ᚲᚨᚢᛚᛞᚱᛟᚾ ᛃᛟᛏᛁ 2 месяца назад

    Robert Fico

  • Grant Keller
    Grant Keller 2 месяца назад

    that was interesting but the Coriolis force is a atmospheric effect of freely moving air deflected by earth's rotation how does it apply to your pool drainage ?

  • Can Attal
    Can Attal 2 месяца назад

    You were dropping dye in it and you claim the water to be still. And you didn't show the courtesy let us watch the experiment without a cutscene.

    What a bunch of bullshit.

  • Guja Natroshvili
    Guja Natroshvili 2 месяца назад

    wow that's great even Michelson Morley could not prove earth's rotation, but you did it...

  • Chris Modisette
    Chris Modisette 2 месяца назад

    Fantastic work, guys! Thank you for clearing up that issue.

  • Rafael Valle
    Rafael Valle 2 месяца назад

    I put the videos on the wrong side v.v They should have warned us

  • Aryamaan Singh
    Aryamaan Singh 2 месяца назад +1

    Put this video on left...

  • Abhinav the Human
    Abhinav the Human 2 месяца назад

    anyone notice the difference in views between the two channels?

  • Armin Hierstetter
    Armin Hierstetter 2 месяца назад

    Awesome job, guys!

    PS: This comment is synced.

  • Tiphanie Morgan
    Tiphanie Morgan 2 месяца назад

    In this controlled experiment doesn't it matter which side of the pool you're on when you drain out the water? When the water was spinning clockwise, he was on the right hand side of the pool. The other guy in Australia who did the same experiment was on the left side when he drained out the water, causing the water to drain out counterclockwise.... Has nothing to do with the poles or hemispheres..

  • Angela Gonzalez
    Angela Gonzalez 2 месяца назад

    what happens on the equator

  • Fahad Hossain
    Fahad Hossain 2 месяца назад

    Guys, I love you both and both of you clearly describes complicated things

  • Geert Vis
    Geert Vis 2 месяца назад

    What will the water do on the exact middle of the earth, the Equator?
    The middle of north and south?

  • OG Afghan
    OG Afghan 2 месяца назад




    And its funny because Muslims claim Prophet Abraham built the "KABAA" 🕋 where Muslims submit towards it from all over the world and the Muslims who make pilgrimage there also go around the Kaaba in the same direction. And if we look at the orbit rotation & the expired stars with black holes we can see how they rotate in same old direction. Much SIGNS of science in Quran.


    ~ Albert Einstein

  • TieXiongJi
    TieXiongJi 2 месяца назад

    Great pair of videos. This helped me win an internet debate, but it was already obvious thanks to the hurricanes I have seen on the Weather channel.

  • Mahesh M
    Mahesh M 2 месяца назад

    Antipodean Myth

  • Amet Moussi
    Amet Moussi 2 месяца назад

    You recycled that water ?

  • random human
    random human 2 месяца назад

    i read it as Taylor swift 😅

  • NasToy
    NasToy 2 месяца назад

    I placed the videos on the wrong side of eachother, so the end where you go to the other guys camera, it just looked weird.

  • lee guankiat
    lee guankiat 2 месяца назад

    I am going against everyone in the world. The earth is concaved.

  • The TomFoolery Of The International Space Stage

    I recreated your experiment and failed to get a anti clockwise rotation.

    Do you really think you can detect the spin of he earth with a kiddy pool in your shed lulz?

    The "Truth" About Toilet Swirls - Destin Sandlin and Veritasium Coriolis Experiment #1

  • Brad Lamont
    Brad Lamont 3 месяца назад

    that was sick

  • Xanthopteryx
    Xanthopteryx 3 месяца назад

    Your explanation of the the coriolis effect is not quite right, unfortunately.

  • Lamar Shealey
    Lamar Shealey 3 месяца назад

    you have to do this it is cool

  • teo_B_boy
    teo_B_boy 3 месяца назад

    So if the earth wasn't rotating the water won't be spinning at all

  • Joey Finton
    Joey Finton 3 месяца назад

    What if you did this on the equator?

  • Ben Kissell
    Ben Kissell 3 месяца назад

    This is the best vid ever

  • John Larrabee
    John Larrabee 3 месяца назад

    this was genius

  • Daniel George
    Daniel George 3 месяца назад

    Wow that was just amazing :)