The Truth About Toilet Swirl - Northern Hemisphere

  • Published on Jun 3, 2015
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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,
  • Science & TechnologyScience & Technology

Comments • 6 032

  • Gavin Martin
    Gavin Martin 2 days ago

    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 days ago

    I synchronized them perfectly!

  • Nadesmond
    Nadesmond 2 days ago

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

  • *User.Aaron*
    *User.Aaron* 3 days ago

    Where you at Northern flat-earthers

  • Samuel Langweil
    Samuel Langweil 3 days ago

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

  • Jack Fredricks
    Jack Fredricks 8 days ago

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

  • josorr
    josorr 9 days ago

    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

    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 11 days ago

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

  • dylan casto
    dylan casto 13 days ago

    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 15 days ago

    885 flat earthers disliked.

  • Its Dextrin
    Its Dextrin 15 days ago +1

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

  • Anand Viswanathan
    Anand Viswanathan 16 days ago

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

    YASH RAJ SHARMA 18 days ago

    the best thing i've watched on internet


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

  • John Doesitintheair
    John Doesitintheair 19 days ago

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

  • Anthony A.
    Anthony A. 20 days ago

    How come I didn't know this

  • Tim Cunningham
    Tim Cunningham 20 days ago

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

  • Angelo Parodi
    Angelo Parodi 21 day ago

    Didn’t sync them😪

  • Gregory Paul George M


  • Xelexotrov
    Xelexotrov 22 days ago

    wait. hold on. so people actually thought that?

  • Ethan Brody
    Ethan Brody 22 days ago

    This was great

  • Pzyko TV
    Pzyko TV 23 days ago

    This is the most original collaboration i have ever seen! I am amazed! Thank you so much for this!

  • collin
    collin 23 days ago

    Who else didn’t synchronize or subscribe to veritasium 😎

  • VanDerCroiX
    VanDerCroiX 23 days ago

    first time dual monitor was totally worth it :')

  • Abdulmuati Asiri
    Abdulmuati Asiri 24 days ago

    Wow that was amazing

  • Jerry Fang
    Jerry Fang 24 days ago

    I've always knew the water swirl in different direction between the 2 hemisphere when I was a kid. I've told friends and family about it and they thought I was crazy. Now thanks to your guys, ya just proved it. :)

  • The BlockHeads
    The BlockHeads 24 days ago

    This is so cool!!!!! And I have two monitors so I was so happy to see you guys switch places the right way at the end

  • Danny Forrest
    Danny Forrest 25 days ago

    Love it!

  • Stupid Engineer
    Stupid Engineer 25 days ago

    what is this? lol...

  • Conner Vieira
    Conner Vieira 25 days ago

    That was awesome! Really creative!

  • trondx
    trondx 26 days ago

    I'am sorry. This was bad science. The seize and shape of the pool was good enought at my opinion, but You have to repete the draining at least ten times, to get a tiny indication. Sorry guys, thumbs down.

  • Aon Arts
    Aon Arts 26 days ago

    This was supremely awesome!!!!! Best experiment implementation using the internet I’ve ever seen! YESSSSSSSSS!!!!!!

  • Aon Arts
    Aon Arts 26 days ago

    This was magical c

  • Peter Ryseck
    Peter Ryseck 27 days ago

    What would happen on the equator?

  • Peter potopus
    Peter potopus 27 days ago

    the video looks really dumb when just watching it by itself and not with the other video playing lol

  • Tim Nafziger
    Tim Nafziger 28 days ago

    TOTALLY AMAZING -- great version!!! I totally enjoyed this!!

  • eye4invisible
    eye4invisible 28 days ago

    Awesome collaboration and editing!

  • William Badzio-George
    William Badzio-George 28 days ago

    You çonducted this experiment with one pool in one hemisphere. It's not going to absolutely prove the theory correct.

  • Andromeda Gaming
    Andromeda Gaming 28 days ago

    Im subscribed to both of you! Great video

  • Banbino Gaming
    Banbino Gaming Month ago

    One day i was washing dishes and i spined wather clock whise and at the last second the water turned counter clock whise and that was super weird

  • Ratsquid
    Ratsquid Month ago

    I did this experiment not long ago right tap made a clockwise rotation left tap made anti clockwise rotation and water left for a long time went straight down with a satisfying glug. I like science and the fact we are taught theory as fact is insane

    • Kel Duck
      Kel Duck 10 hours ago

      So you had no understanding of this video.

  • Richard Yuan
    Richard Yuan Month ago

    what if ur on the equator

  • Luka Stefanovic
    Luka Stefanovic Month ago

    Earth does not spin, it is flat and rests on a back of a giant turtle walking through space

  • Alexandre Hamada Possi

    Cool experiment, but I wish you had repeated it a few more times to make the results stronger. But hey, thanks for validating my abnormally wide screen!

  • Camilo G
    Camilo G Month ago

    I've never commented on a TVclip video before, but this double sync video deserved it. Great job.

  • An Interstellar Odyssey

    Difference of 200,000 views so 200,000 idiots

  • Gear and Outdoor GER.

    This is so cool watching two videos that interact with each other. This is so difficult to cut

  • Lukas Cameldooski
    Lukas Cameldooski Month ago

    That was amazing

  • John Nanney
    John Nanney Month ago


  • B33S_BOT99
    B33S_BOT99 Month ago

    So fascinating!

  • Youmo Yan
    Youmo Yan Month ago

    Great work, BTW, Hank, I still love you.

  • BigLu
    BigLu Month ago

    That was so cool.

  • 23soki23
    23soki23 Month ago

    I had finally did the two monitor synch I was amused more about the timing if everything then researching the experiment...

  • MrFlippy Music
    MrFlippy Music Month ago

    I hope that you find the other sid
    Is this making any
    If it actually is, reply to this comm

  • Bob Johnson
    Bob Johnson Month ago

    You already admitted it was random, and sometimes it rotates clockwise and sometimes it rotates counterclockwise.
    One time is not a sufficient sample size.
    repeat the experiment 100 times.
    Then get back to us.

  • Farisan Hafizh
    Farisan Hafizh Month ago

    I liked and commented this video and the other one at the same time

  • Gibson Kevin
    Gibson Kevin Month ago

    Now for some really cool effects Im going to watch it upside down.

  • Half Elf Gaming
    Half Elf Gaming Month ago +1

    this is cool

  • Nicholas James.S
    Nicholas James.S Month ago

    what an absolutely incredibly display of science, and film making merging flawlessly. by far the best video i have ever seen on youtube by far with no exaggeration.

  • Kevin Houston
    Kevin Houston 2 months ago

    SmarterEveryDay: I don't see how you can, logically or reasonablly, maintain a swirling Coriolis Effect on a globe where the overall atmosphere is not even independent of the landsphere in it's midst. Afterall, globalists MUST maintain that both the landsphere & atmosphere are moving at the exact same speed. If the atmosphere were not moving, at all, then the landsphere would cause anybody, who is standing on it's surface, to experience as much wind resistance as the speed-of-spin is at his or her geological location. If standing at the Equator, then about a 1,000mph of wind resistance would be generated as the landsphere moved you against the still air in the atmosphere. It would be like trying to stand on the wing of a futuristic jet that can travel at the speed of 1,000mph. This is why globalists MUST maintain that both the atmosphere & landsphere move together at the same rate of speed. If there was even the slightest difference, between the two, then stillness of air could NEVER be experienced on a globe and the swirling Coriolis would have a cause and ever be in effect because of it. However, stillness of air is QUITE OFTEN experienced all over the world. It doesn't even matter if the Equator is moving faster than, per se, the Tropics (Cancer & Capricorn) because the amount of land to speed-of-spin ratio, experienced at every line of latitude, in the whole landsphere, is equal in proportion to every other part. It has to be because it is connected, thereby, allowing no excess force to be experienced (from the overall unit thereof) when transitioning between differing speeds in differing geological locations. The same would, alikewise, be true for the overall atmosphere. Since the amount of air to speed-of-spin ratio, experienced at every line of latitude, in the whole airsphere is equal in proportion to every other part. It has to be because it is connected, thereby, allowing no excess force to be experienced (from the overall unit thereof) when transitioning between differing speeds in differing aerospace locations. And since so called: "outerspace" consists of no substance, at all, then the atmosphere would receive no frictional resistance on it's convexed outer rim from that. Nonetheless, it's concave underside, being a thick gaseous air fluid, would interlock with the landsphere's round ridgity surface (like a bike chain on a sprocket) and, therefore, would allow no kind of swirling motion (or Coriolis Effect) to be experienced (from the overall conjoined unit thereof) when transitioning between differing speeds in differing landsphere-to-atmosphere connected locations. This is because they are married & interlocked as a conjoined unit themselves. Though one is harder than the other, they are conjoined & propelled together at the exact same speed. Such would allow for isolated disturbances (due to other factors) but never as a direct cause of their overall union. This leaves the swirling Coriolis Effect with no CAUSE! So in order for you to continue maintaining the false notion, you will have to dream of a slightly offset atmosphere-to-landsphere connection by which absolute stillness of air is never experienced on the face of the whole globe (even though, in reality, stillness of air is often experienced all over the world in many different locations). Nonetheless, you absolutely can NOT have it both ways, Sir!!! And finally, here is a video of two whirlpools draining side-by-side but in opposite directions to one another --- --- Furthermore, the world's record sniper shooter mentions many variables but the Coriolis Effect is not one of them --- --- Please don't let your pride cause you to give a dishonest response, Sir.

  • jesokingcryst
    jesokingcryst 2 months ago

  • Nessi
    Nessi 2 months ago

    Rip Mobile

    ABZ SWAGGER 2 months ago

    Whoa that’s so cool. I just put it next to my computer and the ending was so good

  • Joe B
    Joe B 2 months ago

    I guess the Coriolis effect works on pools.

  • Noorquacker
    Noorquacker 2 months ago

    Dang, these are some great videos

  • Kai
    Kai 2 months ago

    this was cool to watch with dual monitor setup :D

  • PecoraSpec
    PecoraSpec 2 months ago

    !rehtraetalf emos ezeeuqs nac i yllaniF
    !enola ssel leef em ekam ytisoiruc ruoY !eromyna derob ton m'i won ,tenretni eht no derob saw i elihw uoy dnuof I
    !sguh isewkcolcretnuoC

  • camillebroccoli
    camillebroccoli 2 months ago

    bestfriend goals

  • Cameron Stebbins
    Cameron Stebbins 2 months ago

    This was the most impressive use of TVclip I have ever seen. So creative!

  • jacob almond
    jacob almond 2 months ago

    got this synced up perfect! awesome experience!

  • Gabriel Frisch
    Gabriel Frisch 2 months ago


  • Champy heteromer
    Champy heteromer 2 months ago

    oh man this is so cool

  • Bhargava Jaisimha
    Bhargava Jaisimha 2 months ago

    I have been subscribed to both your channels from quiet some time.
    You guys make some of the most interesting videos on youtube and I'm a huge fan!!!!
    loved the concept of the whole double vid thing!!! (probably the best way to make a colab. vid!)

  • Raphael Wedd
    Raphael Wedd 2 months ago

    The Simpsons did it.

  • cput leader
    cput leader 2 months ago

    what happen if it was on equator? i from malaysia

  • Luqman Mohiuddin
    Luqman Mohiuddin 2 months ago

    Did you try in the Southern Hemisphere?!?! Just to be 100% sure

  • Bp1033
    Bp1033 2 months ago

    Wow, I never watched a video(s) that let me utilize my dual monitor setup in such a way. it was neat.

  • Tyler Berg
    Tyler Berg 2 months ago

    will honey coil in the opposite direction?

  • Miguel Diaz
    Miguel Diaz 2 months ago

    o.m.g destin so the corialis is real!!!!!!

  • mike s
    mike s 2 months ago

    1. the way the toilet swirls, is due to the way its manufactured. Its designed to allow the liquid to flow to one side first, then rotate around the rim. 2. inconsistent silicone, or what ever sealer you used in the center of the pool, to seal the exit port, will alter the flow too. It needs to be a machined part for accuracy.

  • RattyCZ
    RattyCZ 3 months ago

    its awsome!

  • Jonathan Pilic
    Jonathan Pilic 3 months ago

    wow, awesome collaboration and at the time the subject is interesting.. the main thing is when I play both video synchronized my mind blow. I'm speech less this is new level.. it makes me giggle. I'm already watching and subscribes both smartereveryday and veritasium. thank you both of you and I/we expect more interesting science video in the future. applause....

  • Brandon Poole
    Brandon Poole 3 months ago

    Can you try it at the equator?

  • EpicJimm
    EpicJimm 3 months ago

    coolest video colab i've ever watch :)

  • TorahTV
    TorahTV 3 months ago

    The truth is that this is Bullshit

    • Syahadatul Hidayat
      Syahadatul Hidayat 2 months ago

      at least try to do an experiment to debunk this rather than talking bullshit

  • transparent lemon
    transparent lemon 3 months ago

    How does this have more views than the other?

  • TheDoctor 40
    TheDoctor 40 3 months ago

    its 1:18 am... It pays to stay up late.

  • Wheeled salmon
    Wheeled salmon 3 months ago

    its awesome how when you stop talking he starts idk i think its cool

  • rakerholm
    rakerholm 3 months ago

    Oh my god. This ACTUALLY gave me goosebumps!

  • PalmaKotStube :D
    PalmaKotStube :D 3 months ago

    In Germany the water is going straight down no swirl

  • Mr Awesome
    Mr Awesome 3 months ago

    anyone who has drained a bathtub knows this lol

  • Brew Bear Brewer
    Brew Bear Brewer 3 months ago

    Mind blowing video! Even with just the effects of having two videos synchronized! Wow!

  • Jonahs Channel
    Jonahs Channel 3 months ago

    Pedophile: Hey, Kid, Come over here, I got some candy!
    Kid: Yay! *eats candy*
    Pedophile: Want some more candy?
    Kid: Yeah!
    Pedophile: Follow me then!
    Kid: Okay!
    Pedophile: *brings kid to the woods then knocks him out*
    Pedophile: YES YES
    Pedophile: I GOT SOMETHING SPECIAL FOR YOU MWAHAHA *brings to school*

  • x1RoBoT3x
    x1RoBoT3x 3 months ago

    So if I'm understanding this correctly, if this experiment were to be conducted on the equator, you would produce a portal to another dimension?

  • Tymen Vds
    Tymen Vds 3 months ago

    this is one of the most amazing and well thought out video i have ever seen than you <3

  • Daniel Smartt
    Daniel Smartt 3 months ago

    I'd be interested to see the same experiment done on the equator

  • daniel ramirez
    daniel ramirez 3 months ago

    Love your channel I've got a question. Why wouldn't the water go the opposite way the Earth is rotating? You know like the force you feel in a car when going forward doesn't push you forward it sends you back in your seat. Can you please explain that to me?

  • Jonny Couillard
    Jonny Couillard 3 months ago

    When they see the colored water they will be like what's happening there and call the police