The Evolution of the Heart (A Love Story)

  • Published on: 13 February 2019
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    In order to understand where hearts came from, we have to go back to the earliest common ancestor of everything that has a heart. It took hundreds of millions of years, and countless different iterations of the same basic structure to lead to the heart that you have today.

    Thanks as always to Nobu Tamura for allowing us to use his wonderful paleoart:

    Thanks to Ceri Thomas for the Ichthyostega reconstruction. Check out more of Ceri's paleoart at and

    Produced in collaboration with PBS Digital Studios:

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    Katie Fichtner, Anthony Callaghan, Larry Wilson, Merri Snaidman, Renzo Caimi Ordenes, John Vanek, Neil H. Gray, Marilyn Wolmart, Esmeralda Rupp-Spangle, Gregory Donovan, Ehit Dinesh Agarwal, سلطان الخليفي, Gabriel Cortez, Marcus Lejon, Robert Arévalo, Robert Hill, Kelby Reid, Todd Dittman, Betsy Radley, PS, Colin Sylvester, Philip Slingerland, Jose Garcia, Eric Vonk, Tony Wamsley, Henrik Peteri, Jonathan Wright, Jon Monteiro, James Bording, Brad Nicholls, Miles Chaston, Michael McClellan, Jeff Graham, Maria Humphrey, Nathan Paskett, Connor Jensen, Daisuke Goto, Hubert Rady, Yuntao Zhou, Gregory Kintz, Tyson Cleary, Chandler Bass, Maly Lor, Joao Ascensao, Tsee Lee, Sarah Fritts, Ron Harvey Jr, Jacob Gerke, Alex Yan

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  • Runtime : 9:48
  • dinosaurs dinos paleo paleontology scishow eons pbs pbs digital studios hank green john green complexly fossils natural history heart muscle Fuxianhuia protensa snails fish arthropod mollusks circulatory system genes peristaltic pump gastropods tinman gene Nkx2-5 veins Neoproterozoic Era worms dorsal vessel common ancestor


  • SMeijers
    SMeijers   1 weeks ago

    Is it a coincidence that these primitive hearts all seemed to develop right before the cambrian explosion. Could hearts have been essential in paving the way for a much greater diversity of animal life?

  • VS Theo
    VS Theo   2 weeks ago

    okay imma say it:still a better love story than twilight

  • Danny Pablo-Ramirez
    Danny Pablo-Ramirez   2 weeks ago

    Stopped my heart from breathing to prove him wrong 25 seconds in and now I’m going to die

  • Moira O'Deorain
    Moira O'Deorain   2 weeks ago

    You said heart so many times that it doesn’t sound like a real word anymore

  • Nathanael Raynard
    Nathanael Raynard   4 weeks ago

    Hmm an evolution of the brain might be fun too, we need it in our live without it we'll not be alive

  • Blop
    Blop   4 weeks ago

    Evolution of the bobs

  • Decipher Euphony Notations

    Heart isn't the most important, the Blood is. Life is in the blood. if you don't have a heart you can be hooked up to a machine to help pump BLOOD to the rest of your body, but with out blood, you are dead

  • milan ilic
    milan ilic   1 months ago

    2:49 Oxygen rich-blood and Oxygen poor-blood are swapped on the graphics. Or the arrows directions are wrong.

  • naoufal belkamel
    naoufal belkamel   1 months ago

    only part we say we can give to someone else ... lemme rethink that

  • DjDedan
    DjDedan   1 months ago

    Nature you hacker you...

  • OpenSource Citizen
    OpenSource Citizen   2 months ago

    Thanks. I had a spiritual experience watching this. Maybe do one on the evolution of religion, and nonchalantly suggest that utube will perfect the algorithim so that even the most fundamentalists can be saved!

  • Bailey Collins
    Bailey Collins   2 months ago

    I’d give you my heart Blake, my science daddy

  • Drswag 007
    Drswag 007   2 months ago

    next question is this. which came first, the heart or blood?

  • Thomas D'Alimonte
    Thomas D'Alimonte   2 months ago

    We need a video on... STEVE!! he's mentioned in every video! We need to know more! About Steve.

  • stillsmashin
    stillsmashin   2 months ago

    I got an icebox where my heart used to be.

  • PhiendishPhlox
    PhiendishPhlox   2 months ago

    I love this channel with all my blood-pumping muscle.

  • Queen
    Queen   2 months ago

    Yaasssss feed ma brain 🤤

  • tinku kr
    tinku kr   3 months ago

    Your videos are superb but your speed is toooo much....please slow it down.....understanding takes time

  • FlyHigh
    FlyHigh   3 months ago

    I like hearing "octopodes"

  • Avro
    Avro   4 months ago

    'the genes that are used to form hearts are actually older than the heart its self' Well... obviously?

  • Aeturnalis
    Aeturnalis   4 months ago

    You pluralized octopus correctly, so you get a like :)

  • reverendhull
    reverendhull   4 months ago

    How has the heart "evolved" since the first Homo sapiens and if it hasn't, am I then to presume this is the perfect heart?

  • Dennis
    Dennis   4 months ago

    The brain 🧠 is irreplaceable not the heart. If you heart stop beating you have some time before you are dead. If all brain activities is gone you are dead immediately

  • Ikelos
    Ikelos   4 months ago

    Didn't vertebrates, arthropods and mollusks evolve hearts independently?

  • itsasin1969
    itsasin1969   5 months ago

    My ascending aorta is made of silicone.

  • Sumit Dev
    Sumit Dev   5 months ago

    She broke my heart she should be in jail for half a million your honour

  • Godisin Control
    Godisin Control   5 months ago

    So was the first heart made independent of a womb? At what point did the human heart creation change to be solely formed in the parents womb?

  • Pancake Rila
    Pancake Rila   5 months ago

    are you very hurry to go back home? you can speak not so quickly as you have too many professional terms in the content ......