The Truth About Toilet Swirl - Southern Hemisphere

  • Опубликовано: 3 июн 2015
    Both videos on one page (for desktop):
    Subscribe to Smarter Every Day:
    Click to tweet:
    Some notes:
    We each repeated the experiment 3 times, and got the same results every time. For those of you who might be skeptical, great! A right circular prismatic kiddie pool is only $10 and you can do the experiment for yourself at your latitude. There's really no reason you shouldn't do it for yourself.
    Veritasium on Instagram:
    Patreon Support Link:
    Smarter Every Day 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 Vanessa for filming in Sydney:
    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:

Комментарии • 6 193

  • Phil Rabe
    Phil Rabe 18 часов назад

    I understand that the flat earthers don't believe in water, so this experiment won't help them figure out their larger misunderstanding.

  • J Rob
    J Rob 21 час назад

    You can't do it one time and call it conclusive.

  • Loren Saunders
    Loren Saunders 2 дня назад

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

  • Willie Koorts
    Willie Koorts 3 дня 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!

  • Trans Sporter
    Trans Sporter 4 дня назад +1

    Toilet swirl is usually initiated by angular water nozzles located under the rim which will overpower any minute Coriolis effect.

  • LifeUnder TheMicroscope
    LifeUnder TheMicroscope 5 дней назад +1

    Two turds.

  • Christina Bauer
    Christina Bauer 5 дней назад

    I don't know which is more awesome, the experiment or that you did this together and planned it to show at the same time. My husband and I just watched them together and it was great! Definitely sharing the awesomeness with friends.

  • Elia Maracani
    Elia Maracani 5 дней назад

    What do you think about what is shown in this video on Facebook about the same phenomena?

  • Steven Johnson
    Steven Johnson 5 дней назад

    What happens if you do the experiment exactly on the equator? Will the water go straight down with no spin?видео.html

  • Joel Harris
    Joel Harris 5 дней назад

    Just remember to do the test with an unused toilet.

  • jazeets
    jazeets 5 дней назад

    The size of the bath tub is exaggerated---I am not sure if this 'lagging behind or getting ahead' business is significant in such a small tub.I don't know how to reconcile this with another video by a Kenyan on the equator, showing clockwise rotation in a bowl a few feet north of equator, and anti-clockwise rotation a few feet south of the equator.

  • Sanjay Bhowmick
    Sanjay Bhowmick 6 дней назад

    Amazing how you can say that the effect of the phenomenon is tiny and that it can be seen in flushing toilet (water jets) in the same breath!

  • Prashanth K S
    Prashanth K S 7 дней 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.

  • Ted Grassman
    Ted Grassman 8 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 10 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 !

  • Matt Pipp
    Matt Pipp 15 дней назад

    I can't see how you would get you pool sitting so perfecly that there would be no 'outside' influences

    • elonesnah
      elonesnah 6 дней назад

      Matt Pipp
      The water cant go other ways in this experiment, and lots of other experiments shows the same effect.

    • Matt Pipp
      Matt Pipp 7 дней назад

      elonesnah that's my point. When the water goes the way you think it should, it's set up correctly.

    • elonesnah
      elonesnah 7 дней назад

      Matt Pipp
      Focault pendulums shows same effect, hurricanes show same effect, star trails show same effect pointed at the two celestial poles, eotvos effect shows same....

    • Matt Pipp
      Matt Pipp 11 дней назад

      Kel Duck Right. Not sure how a kiddie pool on top of a piece of plywood falls in line with that. My impression is, they know it's 'set-up' correctly when it spins the way they think it should. That's all.

    • Kel Duck
      Kel Duck 12 дней назад

      Build a strong level foundation, a bit like most buildings in the world.

  • anmol gupta
    anmol gupta 17 дней назад

    wow it was awesome seeing both at the same time

  • Boris Popovich
    Boris Popovich 17 дней назад

    This doesn't prove the globe or the spinning. It can be a moving magnetic field or whatever force that's moving the sky and everything in it above the Flat Earth! You can prove the globe only by taking a picture of the entire thing, and you can prove the spin by making a video of it spinning. Everything else is a theory. You got overexcited too soon.

    • elonesnah
      elonesnah 7 дней назад

      Boris Popovich
      But the earth rotate very slow, only once in 24 hours, or 0.000695 Rpm, speed is relative, if you were a giant holding the earth in your hand it would still only rotate once in 24 hours.
      Focault pendulum, eotvos effect, hurricanes opposite rotation in the two hemispheres, star rotation opposite in the two hemispheres, eotvos effect, tracking the sun and stars with an equatorial mount using only one axis of rotation, the suns movement is 15 degrees every hour due to the earth rotation, no matter from where on earth you measure it.. All impossible on a flat stationary earth.
      So what evidence of no rotation you got?.

    • Boris Popovich
      Boris Popovich 10 дней назад

      Kel Duck I am not claiming anything. I am disputing their claim. There is no evidence that we live on a spinning ball. If we were truly spinning, the oceans would be long gone.

    • Kel Duck
      Kel Duck 12 дней назад

      So you are claiming its a "whatever force", wow magic.

  • Vikash Pratyaksh
    Vikash Pratyaksh 19 дней назад

    Then how about swirl direction at North and South poles. In which direction will they rotate

    • elonesnah
      elonesnah 7 дней назад

      Counter clockwise and clockwise.

  • jeff Webb
    jeff Webb 19 дней назад

    It also depends on how the water in a toilet mechanism is designed and on what side of the bowel it drains to. Better off using a sink.

    • Kel Duck
      Kel Duck 12 дней назад +1

      Watch the video, that way you wont look so stupid.

  • G W
    G W 21 день назад

    Your channel is just fantastic to watch - You get smarter every day!!!! Greetings from NZ

  • Ivan Sin miedo
    Ivan Sin miedo 22 дня назад

    Min 3.53 is such a beautiful picture!

  • Hen Hen 601
    Hen Hen 601 23 дня назад

    Corriolis effect is so fascinating and makes sense : )

  • Emppu T.
    Emppu T. 25 дней назад

    Now i need 2 youtubes open on my phone

  • sometimesgood
    sometimesgood 27 дней назад

    I came from SmarterEveryDay! This was awesome!! :)

  • SCLS
    SCLS 29 дней назад

    They could just edit the videos side by side in one video but noooo

  • Markus Wolf
    Markus Wolf Месяц назад

    Just subbed based on Toilet Swirl and Dustin's recommendation. Also, I had the videos on the wrong side of the screen, so you exited the wrong way but showed up on the other side like pacman.

  • Daniel Lancaster
    Daniel Lancaster Месяц назад


  • Aidan S
    Aidan S Месяц назад +1

    My desktop will only play one video at a time. Dammit

  • Rickvian Aldi
    Rickvian Aldi Месяц назадвидео.html
    hey, this is great experiment!
    gotta try this because sometime in holidays i return to my home town at pontianak

    OMG OMG Месяц назад

    Synced video:

  • Megha Telang
    Megha Telang Месяц назад

    feeling like a boss. watched 16 minutes of content in 8 minutes.!!!

  • miguezscience
    miguezscience Месяц назад

    Science Teacher. Wrong. Coriolis Effect has an effect on large systems like wind and hurricanes not toilets. Please check the facts.

    • elonesnah
      elonesnah 7 дней назад

      Do you see any toilets in the video?.

  • 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.

  • 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!

  • BGMA
    BGMA Месяц назад

    Link for synced up videos:

  • Alexander Balesini
    Alexander Balesini Месяц назад +1

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

    PHSL KSA Месяц назад

    this is awesome !

  • Greyskyy151
    Greyskyy151 Месяц назад

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

  • Rui Cruzeiro
    Rui Cruzeiro Месяц назад

    Check this video out:видео.html
    On the girl's sink, which is small, the Coriolis effect is much more noticeable.
    Great channel!

    • Kel Duck
      Kel Duck Месяц назад

      There is a major issue with how she pored in the water, why did she pour it in off centre when she needed a whirlpool.

  • dereklacy
    dereklacy Месяц назад

    long time smarter subscriber and now I'm sub'd here too!

  • Xanthopteryx
    Xanthopteryx Месяц назад

    That's not the correct explanation of Coriolis effect.

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


  • psydwaindah
    psydwaindah 2 месяца назад

    847 flat-tards took umbrage at this video! If we flushed them down a toilet which way would they swirl before they gurgled into oblivion?

  • John Johnson
    John Johnson 2 месяца назад

    Great simple example to debunk flat earth theorist

  • Feanor K
    Feanor K 2 месяца назад

    Do a video that teaches some science to flat Earthers please!

    • Kel Duck
      Kel Duck Месяц назад

      That is really an impossible challenge. You would have to start at kindergarten level and then there would still be problems.

  • Bishop Racicot
    Bishop Racicot 2 месяца назад

    we want more!

  • Lavuvzu Surat
    Lavuvzu Surat 2 месяца назад

    This is a lie.

  • Lampardi Phosphorous
    Lampardi Phosphorous 2 месяца назад

    Damn im on my phone

  • 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).

  • DoodiePunk
    DoodiePunk 2 месяца назад

    I still don't understand, was there a difference from the southern hemisphere?
    I watched the video twice, but I still can't understand!

    • Kel Duck
      Kel Duck 2 месяца назад

      It spins in different directions depending on the Hemisphere.

  • slaptoad
    slaptoad 2 месяца назад

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

  • phychmasher
    phychmasher 2 месяца назад

    That was so fun, thanks for the effort!

  • arno kosterman
    arno kosterman 2 месяца назад

    It spins in the same way than the planet even the tree s have a spinn

  • arno kosterman
    arno kosterman 2 месяца назад

    Strange that on quantum lv everyting spins the same way .
    Like the spinn Puls mather

  • Ju ch
    Ju ch 2 месяца назад

    Marvelous executed

  • Ziggurat XYZ
    Ziggurat XYZ 2 месяца назад

    That synchronisation experiment was absolutely fantastic.

  • 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

    What about at the equator

  • A. Cesário
    A. Cesário 2 месяца назад

    Amazing video! Congrats.

  • Khalis Suhaimi
    Khalis Suhaimi 2 месяца назад

    (go to destin's video for the beginning of this comment)...ARE AWESOME!!!!!!

  • Matt
    Matt 3 месяца назад

    What foolishness. The guy did the experiment ONE TIME. True science requires the experiment to be done several times. Was the pool on perfectly level ground? He didn’t take that into account. Here’s one more thing, which way does the water drain at the poles? I guarantee that it would spin in either direction. Everyone in here is congratulating this guy but no one thinks for themselves. Sheeple.

    • Kel Duck
      Kel Duck 2 месяца назад

      Well most people read the description, they then find it was done 3 times each, so 6 times all up.
      Explain how non level ground will effect the rotation of the water?
      Your guarantee is worthless.

  • *User.Aaron*
    *User.Aaron* 3 месяца назад

    where you at Southern flat-earthers

    • Kel Duck
      Kel Duck 2 месяца назад

      No FEers down here, we have education.

  • Wrench TV
    Wrench TV 3 месяца назад

    I can make a washing machine now

  • Jack Fredricks
    Jack Fredricks 3 месяца назад

    This video has more up votes and a few less down votes, yet the other has more views.

  • 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.

  • Shaun Villar
    Shaun Villar 3 месяца назад

    So does a real clock run slower in the northern hemisphere? Surely it does as the same force directing the swirl in the water will have an effect on the hands on the dial?

  • Sastkryptlox
    Sastkryptlox 3 месяца назад

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

  • Genesis Apuan
    Genesis Apuan 3 месяца назад

    This was just perfect! Love the double video concept and it worked perfectly! Even at the end when Devin was on your channel the you went to Devin’s and your shoulder was left on your channel. I am not sure if y’all meant that or not but it made the double video meld together!
    Great explanation and experiment, too!

  • ShdwJho
    ShdwJho 3 месяца назад

    Dammit, got to the end of the synch, only to notice i watched both videos on the wrong sides... so I had both youtubers pointing the edge of my screen instead of each other...

  • Pramath Bhat
    Pramath Bhat 3 месяца назад +1

    am I the only one who didn't synchronize?

  • Computer Guy
    Computer Guy 3 месяца назад

    Sir, but the bathtub is very very very very very very small as compared to earth. So I don't think there will be any measurable or observable changes in the pool.

  • quinnster753
    quinnster753 3 месяца назад

    I love how the like and dislike is so similar between these videos. It seems like everyone actually tried the video syncing and thats cool :)

  • Tim Cunningham
    Tim Cunningham 3 месяца назад

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

  • Matthew Holland
    Matthew Holland 3 месяца назад

    Haha that was awesome. Had to use my wifes phone and mine but that was cool!

  • Pzyko TV
    Pzyko TV 3 месяца назад

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

  • Abdulmuati Asiri
    Abdulmuati Asiri 3 месяца назад

    Wow, that was amazing

  • Danny Forrest
    Danny Forrest 3 месяца назад

    Love it!

  • Peter Ryseck
    Peter Ryseck 3 месяца назад

    What would happen on the equator?

  • MDB
    MDB 3 месяца назад +1

    A. Is your backyard PERFECTLY level and would that make a difference?

  • Steve Mendoza
    Steve Mendoza 3 месяца назад never has been this useful.

  • Gear and Outdoor GER.
    Gear and Outdoor GER. 4 месяца назад


  • Cashback Man
    Cashback Man 4 месяца назад

    hi Destin, i'm in the middle of equator
    where will the water swirl?

  • Thumbnail Finder
    Thumbnail Finder 4 месяца назад

    I wasn't gonna play both at the same time, but I did.
    And I'm happy I did. Seriously great job.

  • Delve
    Delve 4 месяца назад

    I want more videos like this. Anyone have any?

  • RefleX
    RefleX 4 месяца назад

    What if your on the equator and do this experiment. Will it flow strait down?!

  • John Nanney
    John Nanney 4 месяца назад


  • Youmo Yan
    Youmo Yan 4 месяца назад

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

  • John Mckerrell
    John Mckerrell 4 месяца назад

    there are no proof wee live on a spinning testical

  • BigLu
    BigLu 4 месяца назад

    That was soo cool. 🤣

  • MrFlippy Music
    MrFlippy Music 4 месяца назад

    e of my comment to finish the sentence.
    sense to you?
    ent so I know!

  • mike mcgln
    mike mcgln 4 месяца назад

    I DONT GET IT.............

  • wizbang68
    wizbang68 4 месяца назад

    I call shenanigans you pulled your hands out one to the left and one to the right so YOU created the swirl and was then followed by the drain.

  • Archangel Raphael
    Archangel Raphael 4 месяца назад

    A challenge to raise your game Veritasium?
    *All of the preachers and creatures and teachers have such a hard time using the S word when teaching 'we the sheeple' about science ...*
    please tell me WHY the idea called 'chiral' in physics seen as a very subtle force has NOTHING to do with the 'coriolis effect' and of course the '4-fold World TEACHER' a very fine diplomat of the idea called 'perpendicular'?
    the SwaStika World TEACHER is shadowing Veritasium
    Derek sadly ye are another fine mind unable to see the obvious hidden in plain sight, and instead of teaching about the simple EMPIRICAL facts regarding the 4-fold and 3-fold World TEACHER today making its emergence known as the gammadion in the world of nano and chiral meta-materials ye CHOSE to ignore it ... why?

  • Subeesh panthroli
    Subeesh panthroli 4 месяца назад +1

    tell me what is the direction of rotation at equator?
    Do this experiment at Ecuador

  • Farisan Hafizh
    Farisan Hafizh 4 месяца назад

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

  • Forever Flat
    Forever Flat 4 месяца назад

    Dude this was terrible... MIT conducted this same experiment? Are they that dumb too? 1 pool? 1 sample? And you claim proof? Why didn’t you have 4 or 6 smaller pools. I just got dumber not smarter. I wouldn’t be surprised if NASA funded this experiment, unreal. 🤦‍♂️