The Secret of Synchronization
How does order spontaneously arise out of chaos? This video is sponsored by Kiwico - go to for 50% off your first month of any crate.
An enormous thanks to Prof. Steven Strogatz - this video would not have been possible without him. Much of the script-writing was inspired and informed by his wonderful book Sync, and his 2004 TED talk. He is a giant in this field, and has literally written the book on chaos, complexity, and synchronization. It was hard to find a paper in this field that Steven (or one of his students) didn't contribute to. His Podcast "The Joy of X" is wonderful - please listen and subscribe wherever you get your podcasts
Nicky Case's Amazing Firefly Interactive -
Great Kuramoto Model Interactive -
Strogatz, S. H. (2012). Sync: How order emerges from chaos in the universe, nature, and daily life. Hachette UK. -
Strogatz, S. H. (2000). From Kuramoto to Crawford: exploring the onset of synchronization in populations of coupled oscillators. Physica D: Nonlinear Phenomena, 143(1-4), 1-20. -
Goldsztein, G. H., Nadeau, A. N., & Strogatz, S. H. (2021). Synchronization of clocks and metronomes: A perturbation analysis based on multiple timescales. Chaos: An Interdisciplinary Journal of Nonlinear Science, 31(2), 023109. -
The Broughton Suspension Bridge and the Resonance Disaster -
Bennett, M., Schatz, M. F., Rockwood, H., & Wiesenfeld, K. (2002). Huygens's clocks. Proceedings of the Royal Society of London. Series A: Mathematical, Physical and Engineering Sciences, 458(2019), 563-579. -
Pantaleone, J. (2002). Synchronization of metronomes. American Journal of Physics, 70(10), 992-1000. -
Kuramoto, Y. (1975). Self-entrainment of a population of coupled non-linear oscillators. In International symposium on mathematical problems in theoretical physics (pp. 420-422). Springer, Berlin, Heidelberg. --
Great video by Minute Earth about Tidal Locking and the Moon -
Strogatz, S. H., Abrams, D. M., McRobie, A., Eckhardt, B., & Ott, E. (2005). Crowd synchrony on the Millennium Bridge. Nature, 438(7064), 43-44. -
Zhabotinsky, A. M. (2007). Belousov-zhabotinsky reaction. Scholarpedia, 2(9), 1435. -
Flavio H Fenton et al. (2008) Cardiac arrhythmia. Scholarpedia, 3(7):1665. -
Cherry, E. M., & Fenton, F. H. (2008). Visualization of spiral and scroll waves in simulated and experimental cardiac tissue. New Journal of Physics, 10(12), 125016. -
Tyson, J. J. (1994). What everyone should know about the Belousov-Zhabotinsky reaction. In Frontiers in mathematical biology (pp. 569-587). Springer, Berlin, Heidelberg. -
Winfree, A. T. (2001). The geometry of biological time (Vol. 12). Springer Science & Business Media. -
Special thanks to Patreon supporters: Mac Malkawi, Oleksii Leonov, Michael Schneider, Jim Osmun, Tyson McDowell, Ludovic Robillard, jim buckmaster, fanime96, Juan Benet, Ruslan Khroma, Robert Blum, Richard Sundvall, Lee Redden, Vincent, Lyvann Ferrusca, Alfred Wallace, Arjun Chakroborty, Joar Wandborg, Clayton Greenwell, Pindex, Michael Krugman, Cy 'kkm' K'Nelson, Sam Lutfi, Ron Neal
Written by Derek Muller and Petr Lebedev
Animation by Fabio Albertelli and Jakub Misiek
GFX and 3D animation by Jonny Hyman
Filmed by Derek Muller and Raquel Nuno
Edited by Derek Muller
Additional video supplied by Getty Images
Thumbnail by Ignat Berbeci
More footage from NASA's Scientific Visualization Studio
100 metronome video from
Intro animation by Jorge Cham
Thanks for the BZ footage from SteinbockGroup: and
Animation of waves in the heart from The Virtual Heart/ EM Cherry/ FH Fenton - and
Chemical materials and protocol provided by Mike Morris and the UCI Chemistry Outreach Program
Thanks to Alie Ward for title/thumbnail consultation
Thanks to Dr Juliette Becker and Dr James O'Donoghue for the planetary science help
Music from Jonny Hyman, Epidemic Sound "Seaweed" "Deeper Than The Ocean" "Ripple Effect"
Music also from Artlist "Children of Mystery"
Thumbnail by Ignat Berbeci

  • Aaron Martinez
    Aaron Martinez

    Dammit veritasium stop keeping me awake!

  • Diletta Moscatelli
    Diletta Moscatelli

    When I was young I often went to church and when we had to eat the host everybody walked in lines oscillating like penguins all at the same I understand why, that’s amazing

  • Javier Torres
    Javier Torres

    You idiots got the Moon thing wrong but, OK...

  • ying17zi

    Subscribed. Like the video and your voice! Thank you for making/creating this video!

  • Digit Study Point
    Digit Study Point


  • Joel Oliver
    Joel Oliver

    An easy way to get synchronization is to go”ooh oooohhhh oohhhh ooohhh oooooohhh” in a room full of guys

  • Jared Croft
    Jared Croft

    Narrator: to understand it, we have to go back 350 years. My stoned ass: Well let's go then.* smirks with a smile, leans back in chair and props foot on knee*

  • Collin Smith
    Collin Smith

    Great video! 👍

  • Mange Chanagement
    Mange Chanagement

    That metronome syncing was amazing. In saying that - is everyone getting an ad per minute or is it just me? Is google syncing our ads cos its driving me mad. Time to move all content onto TikTok Veritasium

  • Willfrye1980

    I have zero interest in this whatsoever. But I watched it all and loved every minute of it.

  • Diego Fernandes
    Diego Fernandes

    My brain!!! I LOVED THIS VIDEO!

  • Shaunak Dhekane
    Shaunak Dhekane

    Quick question, why did the pendulums sync out of phase but all the metronomes synced to the same phase?

  • Big DogCountry
    Big DogCountry

    ...periods in the amazon brigade

  • Friday’s are cool
    Friday’s are cool

    Almost as if it was designed...

  • Pirom

    7:30 Captain America and The Falcon first meeting 15:02 - happy 420

  • N

    Wait is this the same huygen who proposed why waves diffract through small gaps?

  • Beobout6

    I really don’t care how it works, I just love watching 100 metrothingys all clicking together. How soothing!

  • C.T. E.
    C.T. E.

    The last comment about understanding. If understanding a way to get a grasp on things like disease and everything that is earthly would be a great first achievement. Then they can move on to the spiritual, worm holes and time travel. See all the parallel universes and dimensions. Everything seen and unseen is vibrating at an unknown resonant frequency. Our eyes can only see the light of this plane (earthly plane) that is vibrating. If only the eyes of our soul could see 👀 the spiritual plane, while still alive.

  • Christian Roi Cabel
    Christian Roi Cabel

    When your heartbeat synchronized with someone you hug

  • Alejo Steinman
    Alejo Steinman

    Where there's universe there's order, and where there's order there's God.

  • SurvivorCraft YT
    SurvivorCraft YT

    3:54 that happened with the flashers of two cars

  • Kevin Aldana
    Kevin Aldana

    This remember me to find the mcm

  • Aline Sanchez Ramirez Baruchi
    Aline Sanchez Ramirez Baruchi

    This is the kind of breathing and colour of those who saw something beautiful

  • Aline Sanchez Ramirez Baruchi
    Aline Sanchez Ramirez Baruchi

    Love makes him more productive, I guess

  • Sam Strohl
    Sam Strohl

    Damn, why doesn't this happen with blinkers when I'm driving

  • balcomoz

    I've tried that but it doesn't work. And I've used high quality digital metronomes

  • Kalo

    Was watch this on tik tk and accidentally refreshed, glad u found it in here, wasn't expecting it to be the same video tho. Yay

  • Staarkalinou

    great as usual 👍

  • Jukes McGee
    Jukes McGee

    I NEED to know the music for that intro. What beautiful ambience.

  • IronPump89

    Thanks, bifurcations and limit cylce oscillations are amazing !

  • mic jones
    mic jones

    What if they tuned the " guitar strings" of the bridge to a different octive or different key?

  • fouoii gyhh
    fouoii gyhh

    so, similar to "when you stare into the abyss, the abyss stares back at you", "When you beat something into rhythm, that something also beats you into rhythm."

  • Elif Göksu Algın
    Elif Göksu Algın

    does this mean all moons of all planets are eventually going to lock??

  • Xeno The Strange
    Xeno The Strange

    Everyone here is secretly learning to code and they don't know it yet...

  • Sergio B. Meza C.
    Sergio B. Meza C.

    Very, very interesting. In the video, people looks like penguins walking...

  • FirstName LastName
    FirstName LastName

    Does the fact that planets circle around their sun more or less in same plane also have a synchronization explanation? Also, I would perhaps think this plane is more or less perpendicular to the rotation axis of the sun ...

  • Soul

    I know how every polyrhythm eventually syncs up on one beat even with vastly different rhythms like 34:83 or 12:95, a similar principle here.

  • Shamus Beaglehole
    Shamus Beaglehole

    Every prostitute should be forced to watch this video every day around 4pm.

  • Shamus Beaglehole
    Shamus Beaglehole

    All people are horses.

  • LUCIFER FPS - Fury
    LUCIFER FPS - Fury

    I saw this Nike red video. That dude does some crazy chemical experiments

  • watching Kung Fu Panda 2
    watching Kung Fu Panda 2

    12:29 What instrument is that ?

  • Memespeech

    disorder and chaos are subjective terms

  • Joseph Ololade
    Joseph Ololade

    An intelligent designer made the universe Yahweh is his name

  • Lenard

    9:53 synchronised clapping after chaos clapping is a cultural thing in Hungary, it may be due to what you said, but people do it consciously as it means ‘again’-for the performers to come out and bow etc

  • Haͥppͣyͫ UK ๖ۣۜƤaͥτrͣiͫoτ
    Haͥppͣyͫ UK ๖ۣۜƤaͥτrͣiͫoτ

    The law of entropy is not really about order in the sense of organisation and synchronicity. It's actually more about one very fundamental concept. For any process, the amount of energy available for work is diminished. As long as there is a difference of energy levels, there is a potential for a flow of energy and therefore a potential for work to be done. If all the energy in the universe was evenly distributed, things would be very orderly and synchronised, but the universe would be stone cold dead.

  • Rajesh Roger
    Rajesh Roger

    scapegoat central, no need for sorries or thank you. I don't care

  • Pranshu Aggarwal
    Pranshu Aggarwal

    What was the last bit "How can you figure out properties of the whole given the properties of parts?"

  • yaogog

    best friend women can synchronise their periods

  • Abner Jr. Paredes
    Abner Jr. Paredes

    Quality content.. Love it

  • Mario Velez
    Mario Velez

    This has to be one of my favorite videos ever on SLtoos

  • E B
    E B

    The millennium bridge wasn't swaying because the people were walking in step, the people were walking in step in response to the lateral sway of the bridge. Their walking in step then caused it to sway ever more.

    • Captain Aryán
      Captain Aryán

      Then how were they supposed to 'walk' ?

  • Subhranil Majumder
    Subhranil Majumder

    @Prof. Steven Strogatz and @Veritasium, I believe the reason why it is hard to figure out the properties of whole given the properties of parts is because, of the level of mental activity human mind can reach in normal state. Due to the limited amount of energy our body can process, it becomes very hard to understand the bigger picture, which is relative in different people's case.

  • Tory Slusher
    Tory Slusher

    Coupled oscillation via vibrational transference, got it.

  • NEWS

    Well I am not auto synchronised to my missus, maybe I am a freak of nature?

  • Paradox G
    Paradox G

    Chaos and Order are not different to Nature.... They are 2 sides of the same coin.

  • Adrian Epic
    Adrian Epic

    Finally, something to adequately explain Aphex Twin's video, windowlicker. Thank you for your service, good sir.

  • Laksyians sTuDy TiMeS
    Laksyians sTuDy TiMeS

    Actually at all you challenge the physics.

  • Kelley McBride
    Kelley McBride

    Super cool video thanks!

  • libertyn jeopardy
    libertyn jeopardy

    Obviously there is a God, unfortunately this fact is not obvious to many. Giving credit to "Nature" is naive and illogical.


    This can apply to all life, I’ll give you an example I was at a concert and somebody started a fight and somebody else in the crowd got angry and they started a fight, at the end of the concert it turned into a riot and everyone was starting to fight. This theory applies to everyone and that GOD is real, And synchronization is the key to the multi-verse.

  • Bellhop Walrus
    Bellhop Walrus

    I notice this happening in a line of cars, with their turn signals on. They'll sync up for a while, then go out of phase again, creating interesting rhyrmic patterns. I am very easily entertained.

  • Muhammed Shahbaz Sadiq
    Muhammed Shahbaz Sadiq

    Very informative

  • miles andress
    miles andress

    Hey..babies in the nursery cry and dogs in a kennel bark out of sync...

  • miles andress
    miles andress

    So...if one clock out of would anyone know the correct time? He should have had a third clock as a tie breaker..or..better yet..a fourth clock for confirmation🤣

  • Carlo S
    Carlo S

    Your opinion on nature being chaotic and disordered is a subjective point of view. These smaller chaotic occurrences are part of a bigger order.

  • Leslie Henderson
    Leslie Henderson

    This is interesting, because when a group of women get together, like in a roommate kinda situation, then tend to get their periods at the same time!

  • Scott

    So everything has a frequency including us humans. Everything living and inanimate is effected by frequency, however living things have a higher frequency than inanimate objects, and some humans have a higher frequency than others.

  • iBoolGuy

    that was 20 minutes.....? i thought it was 6 yo

  • M Al
    M Al

    Gravity 👈 morons🤓

  • NO

    1 Hz seems worse than 2 Hz would be, but maybe I'm just not a civil engineer

  • iBoolGuy

    “Entropy is the natural order of the universe.”

  • Grim Grinn
    Grim Grinn

    The man at the end sounded like David Bohm :)

  • WJ Stulp
    WJ Stulp

    yet another reason to realize God controls the entire universe.

  • As2000 the stop motioner
    As2000 the stop motioner

    Its same with my walk i literally Almost always walk the same speed in steps as the person Im walking with

  • Eric Singley
    Eric Singley

    Even more interesting is the oscillation in American politics...

  • VenB

    Hehe penguins

  • David Perkins
    David Perkins

    Many years ago myth busters used a linear actuator on an old disused bridge, the movement was maybe 4 to 6 inches but after a while the resonance created a measurable sway within the bridge.

  • Guilherme Santana
    Guilherme Santana

    It was great to learn more about synchronization. It really helped me strengthening up my faith a little bit more. It reminded me of a God that puts order in chaos as Genesis 1-2 shows us. A God who holds all the wisdom and the secrets of cosmos (Job 38). A God who loves me and you with sacrificial love (John 3:16) and who will eventually put everything in place again (Revelation 22)

  • Muhammad Omer
    Muhammad Omer

    maybe fireflies were celebrating saying hip hip hurraaaaaaaaayyy

  • Dub Dado
    Dub Dado


  • Kenneth

    This is very interesting. Great video. But does this also applies to lights? What if we had blinking multiple blinking lights? Does this apply too?

  • Art Mezins
    Art Mezins

    Two pedantic notes from a retired electrical engineer: [1] The bridge sync is like any system that has a resonance (and there may be more than one resonant frequency in a system). Electrical engineers routines apply "white noise" (randomness) to a resonant system to determine its resonant frequency(s). [2] When two timing sources are "close" in frequency, then something called a "beat" frequency results from the difference between the two frequencies. For example, if one is 0.1% different from the other (i.e. "close"), then there should be one "beat" every 1000 cycles. If 0.01% apart, then 10000, etc. Now if that frequency is from something slow, like a metronome or pendulum, say 1/sec, then you would have to wait 10000 sec (about 2.8 hours) before they sync, but only "momentarily", before they start to drift away. Then there's the "anti-beat" when they're motions are synced oppositely, at half the time, but repeats at the same frequency of once/2.8 hr. Now that also assumes that these are perfect timing systems with no animalities to throw a stick into the spokes, otherwise, more chaos ensues. Now multiply that to say 50 metronomes. The math gets more sticky, like the complexities of the 2-body vs. 3-body (or more) celestial orbital equations. But then computers were made to simulate is stuff so we humans can stay (mostly) sane. And this shouldn't detract from any enjoyment of the simplicity of the world around us, just know that it's there and the engineers (mostly) know how to address any issues that come along (albeit, after the fact sometimes).

  • Mujahid Faruq
    Mujahid Faruq

    I appreciate over exaggerated examples, thank you

  • David Milhous Carter
    David Milhous Carter

    14:12 Golden Ratio.

  • amine mk
    amine mk

    This universe and this life is not random, but meticulously designed by a higher thinker.

  • Its Mango
    Its Mango

    1:56 "They aren't part of an army" That's what you think

  • Dolzinfant

    17:24 shouldn't it say swayed instead of suede in the subtitles? Fabulous video all the same...

  • Will Pablo Brazão Barletta
    Will Pablo Brazão Barletta

    The unstable base is the answer.

  • Mahir Balushi
    Mahir Balushi

    Thanks 👍

  • 46raulfull

    Wait is this why women living together get their periods around the same time?

  • Wilmer Urbina
    Wilmer Urbina

    All this is common sense

  • Salomea Brt
    Salomea Brt

    Is there a formula as to when does the sync happen? At least for something simple, like metronomes? Ah, this is some exciting stuff.

  • Adam Stock
    Adam Stock

    woop nilered

  • Abinash Pal
    Abinash Pal

    The big picture.

  • Ricardo Cortez Calderon
    Ricardo Cortez Calderon

    Esto significa que nosotros volveremos al sol? (Se volvera a juntar la tierra con el sol xd incluidos otros planetas del sistema)

  • Arda Ehi Ehi
    Arda Ehi Ehi


  • Felicia Moniq
    Felicia Moniq

    Hmm. There must be a God somewhere?

  • Jazeen Haral
    Jazeen Haral

    I always wondered why clapping would line up like that!! Omg. When I used to sit in chapel in high school (private Christian school) we would always end up clapping in sync. I would hear this and intentionally change my clapping, lol. I never knew this was almost a rule of nature

  • 360 Nature Relaxation
    360 Nature Relaxation