When Rodents Rafted Across the Ocean

  • Published on: 06 November 2018
  • Support us on Patreon! http://patreon.com/eons

    The best evidence we have suggests that, while Caviomorpha originated in South America, they came from ancestors in Africa, over 40 million years ago. So how did they get there?

    This episode was written by Genevieve Perdue.

    Thanks to Ceri Thomas for the Josephoartigasia monesi reconstruction. Check out more of Ceri's paleoart at http://alphynix.tumblr.com and http://nixillustration.com

    Produced in collaboration with PBS Digital Studios: http://youtube.com/pbsdigitalstudios

    Super special thanks to the following Patreon patrons for helping make Eons possible:

    Katie Fichtner, Aldo Espinosa Zúñiga, Anthony Callaghan, Esmeralda Rupp-Spangle, Gregory Donovan, Ehit Dinesh Agarwal, الخليفي سلطان, Gabriel Cortez, Marcus Lejon, Anel Salas, Robert Arévalo, Robert Hill, Kelby Reid, Todd Dittman, Betsy Radley, PS, Colin Sylvester, Philip Slingerland, John Vanek, Jose Garcia, Noah offitzer, 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, Sapjes, Daisuke Goto, Hubert Rady, Yuntao Zhou, Gregory Kintz, Tyson Cleary, Chandler Bass, Maly Lor, Joao Ascensao, Tsee Lee, Sarah Fritts, Ruben Winter, Ron Harvey Jr, Jacob Gerke, Alex Yan

    If you'd like to support the channel, head over to http://patreon.com/eons and pledge for some cool rewards!

    Want to follow Eons elsewhere on the internet?
    Facebook - https://www.facebook.com/eonsshow
    Twitter - https://twitter.com/eonsshow
    Instagram - https://www.instagram.com/eonsshow/


    Lavocat, R. “La syste´matique des rongeurs hystricomorphes et la de´rive des continents.” Comptes Rendus de l'Académie des Sciences Series D 269 (1969).
    Merali, Z., and B.J. Skinner. Visualizing Earth Science (2009). Hoboken: John Wiley & Sons, Inc.
    Mones, A., and J. Ojasti. “Hydrochoerus hydrochaeris.” Mammalian Species 264(1986).
    Morrison, M.L., Marcot, B.G., and R.W. Mannan. Wildlife-Habitat Relationships: Concepts and Applications, 3rd ed. (2006). Washington, D.C.: Island Press.
    Nowak, R. M. Walker’s mammals of the world, 5th ed. (1991). Baltimore: Johns Hopkins University Press.
    Patton, J. L., Pardiñas, U. F. J., and G. D’Elía. Mammals of South America, Vol. 2, Rodents (2015). Chicago: The University of Chicago Press.
    Scotese, C.R. “A Continental Drift Flipbook.” The Journal of Geology 112.6 (2004).
    Simpson, G.G. 1940. “Mammals and land bridges.” Journal of the Washington Academy of Sciences 30 (1940).
  • Runtime : 10:20
  • dinosaurs dinos paleo paleontology scishow eons pbs pbs digital studios hank green john green complexly fossils natural history Caviomorpha guinea pigs capybara chinchillas porcupines South America Africa Hystricognathi infraorbital foramina hystricognaths Caviomorphs old world new world molecular clock Eocene Gondwana rafts Rio Grande Rise Walvis Ridge Atlantic Ocean adaptive radiation sweepstakes colonization


  • David Ev
    David Ev   4 days ago

    Yaaaay. Cali is #1. She is the best.

  • Ravi Sanghvi
    Ravi Sanghvi   4 days ago

    So Christopher Columbus or Amerigo Vespucci, did not discover sea route to Americas?A rat discovered sea route to Americas long ago?Americas should be celeberating "Rodent Jerry day" every year then.

  • sharkfinbite
    sharkfinbite   6 days ago

    Capybara don't look cute. Only you sheltered domesticated people would consider it cute

  • pinkgalah
    pinkgalah   1 weeks ago

    Why was south america so open to niches?

  • Sir Dude
    Sir Dude   1 weeks ago

    I think the chain of islands and shallow water is the only theory that even remotely plausible. Not only would it explain the other "sweepstakes colonizers" it far more plausible than a raft of random debris that somehow managed to cross the open ocean in 11-8 days without breaking apart and without the passengers dieing of dehydration and possibly malnutrition. Also how can we be sure that the ocean that is half size of our modern ocean between Africa and south America is the same? I would think that it would be at least significantly different If not completely. I understand that this is not fully understood and that PBS Eons is trying to give all the information they can

  • drwnpadilla
    drwnpadilla   1 weeks ago

    You're awesome thank you for your information

  • Whiskey Bravo
    Whiskey Bravo   2 weeks ago

    Given enough time, the unlikely becomes inevitable.

  • Rios Salvajes
    Rios Salvajes   2 weeks ago

    Kallie is my favorite host. She can make clear and interesting the most complicated thing. And she's gorgeous too.

  • Maxine Bonadie
    Maxine Bonadie   2 weeks ago

    Did she say...”...somehow” Like she doesn’t know exactly how🤣

  • jusk8lp
    jusk8lp   3 weeks ago

    I want to learn about the evolution of BATS

  • Beneko '11
    Beneko '11   3 weeks ago

    Huh.... so sea rats sailed the seas..... pi-rats

  • Zephiris
    Zephiris   3 weeks ago

    I prefer the flying pikachu theory. They crossed by balloons~

  • HonorisCreed
    HonorisCreed   3 weeks ago

    07:30, you call dying of thirst "unpleasant"? o_o

  • Sirius White
    Sirius White   3 weeks ago

    thanks for your video. the rodents could have drank fresh water during and after rainfall. also, if the temperature was very cold and there was ice between the continents, clearly the rodents could also have walked across the ice to find new land.

  • Ruben Kelevra
    Ruben Kelevra   4 weeks ago

    Columbus: I've crossed the Atlantic Ocean and discovered America!Guinea Pig: Hold my running wheel

  • Kevin Schultz
    Kevin Schultz   1 months ago

    so then are porcupines in America and in Africa examples of convergent evolution?

  • ꧂Oddish꧂
    ꧂Oddish꧂   1 months ago

    I thought the video was a metaphor about European imperialism, it's not carry on.

  • pablo znotti
    pablo znotti   1 months ago

    fun fact,there are a couple of species of iguana native to Fiji,they could only have got there by rafting all the way across the Pacific.that's a very long way.

  • Travis Merriman
    Travis Merriman   1 months ago

    Rats have proliferated by travelling with humans. Hominids with brains like ours existed 40 million years ago. Boats are low tech.

  • good dog
    good dog   1 months ago

    Capybaras = peace bears

  • Quinceps
    Quinceps   1 months ago

    Just say "leeeend" (land) or "Atleeentic".

  • Cat Santos
    Cat Santos   1 months ago

    .....COME SAIL AWAY! COME SAIL AWAY!!..... 🐭🐹🐰⛵️

  • Martin Costas
    Martin Costas   1 months ago

    2.600 km? from south america to africa? really? are you shure? seems kind of short.

  • Uriel Septim
    Uriel Septim   1 months ago

    Now these days they stow in ships. Hopefully not during space age.