The Truth About Toilet Swirl - Northern Hemisphere

  • Опубликовано: 3 июн 2015
    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.
    Smarter Every Day Instagram:
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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

Комментарии • 6 145

  • Widder Willen
    Widder Willen 3 дня назад

    One used a plug and a very small tube and the other used a valve and a larger pipe to drain the same sized pool (I wonder if the length and diameter of the pipe would have a different effect) = Not the same experiment. But hey, great that it worked the first time. Perhaps even 3 times. That's not enough testing.
    If they didn't see in which direction the water was going how could they see that it stood still? Because they waited 24 hours and the earth stopped rotating for the time beeing?

  • Kevin Field
    Kevin Field 3 дня назад

    By this theory, there should be no swirl at the equator. Has anyone experimented at that location?

  • Hoe YY
    Hoe YY 5 дней назад

    It looks like a typhoon/hurricane

  • Riley Nash
    Riley Nash 7 дней назад

    Of course it’s real, ask any long distance shooter.

  • Shamas Johnson
    Shamas Johnson 8 дней назад

    Where my Flat Earhers at?

  • Wesley Bates
    Wesley Bates 9 дней назад

    very clever and brilliantly executed

  • Phil Indeblanc
    Phil Indeblanc 9 дней назад

    Too bad the video is EDITED!! At 3:27 you can see what they have done if you watch closely.. Maybe the wishful thinking got the best of him, as I enjoy some of his other videos. But this is DISINFO!!
    Wonder if I am blocked, and this too will be deleted?

  • td7shelton
    td7shelton 12 дней назад

    Sorry, but the eventual right angle of the drain below the pool could easily cause that rotation. Not convinced here.

  • Eugenio Ginnasio
    Eugenio Ginnasio 12 дней назад

    This two videos have almost the same likes and dislikes

  • Martin Johnson
    Martin Johnson 13 дней назад

    Does this count as episode 137?

  • Sans the skeleton
    Sans the skeleton 15 дней назад +1

    I like the toilet part

  • Steven Mcelwee
    Steven Mcelwee 19 дней назад

    The water that enters the toilet comes in one way which starts the vortex a certain way. You have to have a body of water with no motion, then pull a plug. Even that has some variables that can affect the initial motion. Basically this is a trash experiment.

  • jonharson
    jonharson 23 дня назад +1

    I have 3 screens, we need to go deeper!

  • Bob Loblaw
    Bob Loblaw 29 дней назад

    Get your brainwashed by liars on this very channel.

  • Sterling215
    Sterling215 Месяц назад

    So.. How do airplanes land on North and South facing runways?

    • Kel Duck
      Kel Duck 23 дня назад

      The pilot lines up on the outer/middle markers, gets into the glide-slope and lands it on the runway, a bit like any other direction runway.

  • Crazykrew616
    Crazykrew616 Месяц назад

    I did the sync up and OMG was I glad I did... it was AWESOME!!!

  • Gabriel Satter
    Gabriel Satter Месяц назад

    I don't doubt the veracity of his conclusion, but you gotta try the experiment several times to make sure.

  • Evan Smith
    Evan Smith Месяц назад

    Why does this video have more views?

  • Walkercat
    Walkercat Месяц назад

    Watching this synched on 2 monitors.... god guys u are unbelivable amazing

  • leon witteman
    leon witteman Месяц назад

    This is SO worth it! I enjoyed it a lot! You guys are awesome, when you concluded on the (ant)arctic pool draining (5:30) Derek's pause between "swirls" and "clockwise" was precisely long enough for you to say "anti" and "clockwise" remaining synced. Please tell me you didn't need to cut the audio track while editing ;). Still, just great!

  • Karla Orosco
    Karla Orosco Месяц назад

    On a side note, we recently had 2 professors from Huntsville visit our class: Dr. Turner and Dr. Benfield. Do you know them?

  • aldensquared
    aldensquared Месяц назад

    There are at least 200,000 people who have only seen one half of this video. I am impressed at how close the views are between the SED and Ve videos. I wouldn't think most people would actually go check out the other video. It's a fun experiment.

  • Jennifer
    Jennifer Месяц назад

    You guys are adorable

  • Albert Sanchez
    Albert Sanchez Месяц назад

    Thanks for the experiment, once again another prove that the earth is NOT FLAT LOL

  • Valerie Walde
    Valerie Walde 2 месяца назад

    Were there threads in the outlet?

  • Wade Blevins
    Wade Blevins 2 месяца назад

    So ....What happens if you are directly on top of the equator? Does the pool drain faster, with no rotation?

  • Loren Saunders
    Loren Saunders 2 месяца назад

    FREAKING BRILLIANT!!!! THANK YOU!!! (I'm yelling on purpose)

  • Mindy Aguliar
    Mindy Aguliar 2 месяца назад

    this all depends on perspective. people in the northern hemisphere see counter clockwise and people im the southern hemisphere see in a mirror image fashion. its called the law of mirrored perspective its a thing u ballers can look it up in the book of pseudo science.

    • jonharson
      jonharson 23 дня назад

      The flat Earth society has members all across the globe...

    • Kel Duck
      Kel Duck Месяц назад +1

      And yet you believe in "hemispheres". I suspect your brain is trying to tell you the Earth is not flat.

  • Willie Koorts
    Willie Koorts 2 месяца 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 месяца 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 2 месяца назад

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

  • Prashanth K S
    Prashanth K S 2 месяца 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 2 месяца назад

    haha this was awesome

  • Ted Grassman
    Ted Grassman 2 месяца 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 2 месяца 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 2 месяца назад

    I'm new to this channel its very good

  • Matt Pipp
    Matt Pipp 2 месяца назад

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

  • Imortal Flame [VIXLE]
    Imortal Flame [VIXLE] 2 месяца назад

    I’m not getting smarter every day

  • George Praisehim
    George Praisehim 2 месяца 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 2 месяца назад

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

  • sometimesgood
    sometimesgood 2 месяца назад

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

  • Adam W
    Adam W 2 месяца 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 2 месяца назад

    But how many trials did you do?

  • Daniel Lancaster
    Daniel Lancaster 3 месяца назад

    Just WOW!

  • Curtis Scott
    Curtis Scott 3 месяца назад

    Simpsons: Bart vs Australia...

  • Moonstruck Exploring
    Moonstruck Exploring 3 месяца 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 3 месяца назад

    Seriously? ;-)

    OMG OMG 3 месяца назад

    Synced video:

  • almarjyou
    almarjyou 3 месяца назад

    i dont get the sync.

  • Shad Stewart
    Shad Stewart 3 месяца 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 3 месяца 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 3 месяца назад

    You guys are cool!!!

  • Mike 1
    Mike 1 3 месяца назад

    Best idea ever

  • Ben Roberts
    Ben Roberts 3 месяца назад

    You should do this on the equator.

  • Phil Protheroe
    Phil Protheroe 3 месяца назад

    Now drain a pool on the equator

  • Tricken87
    Tricken87 3 месяца назад

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

  • Mustafa Süzen
    Mustafa Süzen 3 месяца 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 3 месяца назад

    Brainwashing to the globe

  • Abe Alaniz
    Abe Alaniz 3 месяца 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 3 месяца назад

    These videos should actually have the same amount of views

  • DWS Outdoors
    DWS Outdoors 3 месяца 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 3 месяца назад +1

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

  • Funk Obama
    Funk Obama 3 месяца назад

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

    PHSL KSA 3 месяца назад

    this is awesome !

  • Jonathan Shafer
    Jonathan Shafer 3 месяца назад

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

  • Brandon
    Brandon 3 месяца назад

    What about sample size, Is it repeatable?

  • Nick Ellermann
    Nick Ellermann 3 месяца назад

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

  • crazy observations
    crazy observations 3 месяца назад

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

  • Xanthopteryx
    Xanthopteryx 3 месяца назад

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

  • gab Macpro
    gab Macpro 3 месяца 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 3 месяца 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 3 месяца назад

    I like Drink from Vebistrabidum

  • Aleksy Gaming
    Aleksy Gaming 3 месяца назад

    You can see that earth is round not Flat

  • Sir_Tactical_Slime
    Sir_Tactical_Slime 4 месяца назад

    1:20 sounds like halo reach

  • Luminescent Lion
    Luminescent Lion 4 месяца назад

    with 2 monitors it looks epic

  • Shawn Sutcliffe
    Shawn Sutcliffe 4 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 4 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 4 месяца назад didn't do it in the "south 'hemisphere'" but that proves whatever you want to prove....phony

  • C jest
    C jest 4 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 4 месяца назад

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

  • Juan David Santamaría Sánchez
    Juan David Santamaría Sánchez 4 месяца назад


    BIG DOGE 4 месяца назад

    So cool!!!

  • George Mason
    George Mason 4 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 4 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 4 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 4 месяца назад

    I would have at least clean my toilet first!

  • Raider Horse
    Raider Horse 4 месяца назад

    Checking for if you can see my comment on other side

  • Kyle Riley
    Kyle Riley 4 месяца назад

    That was super cool. Great job guys.

  • Bishop Racicot
    Bishop Racicot 4 месяца назад

    we want more

  • Connor Freeman
    Connor Freeman 4 месяца назад

    What If you have a drain on the equator

  • 1brennon11
    1brennon11 4 месяца назад

    Wow that sync was amazing!

  • Hyacinthe1969
    Hyacinthe1969 4 месяца назад

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

  • Sani R.
    Sani R. 4 месяца назад

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

  • Mostlyharmless1985
    Mostlyharmless1985 4 месяца назад

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

  • Dan L
    Dan L 4 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 4 месяца назад

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

  • Christophoro Baggins
    Christophoro Baggins 4 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 4 месяца назад

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

  • Ju ch
    Ju ch 4 месяца назад

    Marvelous executed