How Sloths Went From the Seas to the Trees

  • Published on: 28 November 2018
  • The story of sloths is one of astounding ecological variability, with some foraging in the seas, others living underground, and others still hiding from predators in towering cliffs. So why are their only living relatives in the trees?

    Thanks to Ceri Thomas for allowing us to use few sloth reconstructions! Check out more of Ceri's paleoart at and

    And thanks as always to Franz Anthony and everyone at for their great paleoart.

    Produced in collaboration with PBS Digital Studios:

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  • Runtime : 12:21
  • dinosaurs dinos paleo paleontology scishow eons pbs pbs digital studios hank green john green complexly fossils natural history sloths Peru Xenarthra anteater armadillo giant sloths Patagonia herbivore Thalassocnus Shasta Ground Sloth basal metabolism Lestodon Diabolotherium Nematherium Hapalops Megalonyx Bradypus Choloepus two-toed three-toed sea cliffs trees


  • Tine Of Nice Dreams
    Tine Of Nice Dreams   3 days ago

    Sloths are the ultimate in a peaceful, sustainable lifestyle and for that I admire them. See opportunities where others do not, stay in your lane, take no more than you give back. The sloth way!

  • jbe678910
    jbe678910   3 days ago

    Hurry cut down all the rainforests so we can kill off these too

  • Ivan Zhukof
    Ivan Zhukof   1 weeks ago

    slow and steady wins the evolutionary arms-race

  • Ravick Bitencourt
    Ravick Bitencourt   2 weeks ago

    Every time I hear about extinct sloths, I get sad about it. =/I kinda like sloths. They got extinct recently here where I live (south Brazil). It'd be awesome to actually see some of those giant species.

  • Brandan Miller
    Brandan Miller   3 weeks ago

    The article linked for the Shasta ground sloth doesn’t say anything about body temperature like what’s stated in the video. That article just talks about the diet of Shasta ground sloths

  • Dragon Xlayer
    Dragon Xlayer   3 weeks ago

    Thanks for all the awesome vids ❤️🧡💛💚💙💜💝

  • Alex
    Alex   3 weeks ago

    they should've stayed in the water

  • 50 Shades of Geek
    50 Shades of Geek   3 weeks ago

    Somewhere along the way a mistake happened in the firm of Sid the sloth.

  • Jay420
    Jay420   3 weeks ago

    wha if sloths are related to seals jus how coyotes are related to cats and not dogs🤔

  • Edy Coyote
    Edy Coyote   3 weeks ago

    All fossils were put here by Satan to test people's faith. They weren't real animals

  • Canzandridas Joe
    Canzandridas Joe   4 weeks ago

    I've been laughing for a while and I feel sad that I probably will never be able to use the words "metabolically challenged" in a sentence.

  • Zack Nimkoff
    Zack Nimkoff   4 weeks ago

    "forgive me for this" okay, i will "very slowly" i have changed my mind

  • CheatsythePimp2
    CheatsythePimp2   1 months ago

    I’m still sad that we can’t clone ground sloths back from extinction...

  • Peter Kröger
    Peter Kröger   1 months ago


  • Aurum
    Aurum   1 months ago

    whales/sloth= role reversal

  • Legacy of Lore
    Legacy of Lore   1 months ago

    6:22... Anyone else thinking badger moles from Avatar the Last Airbender?!

  • C C
    C C   1 months ago

    6:37 where the host mimics "furiously digging" 😆

  • Floppyfish288
    Floppyfish288   1 months ago

    How many species of ground sloth are there???

  • 5pecular
    5pecular   1 months ago

    Survival of the cutest.

  • Front Desk
    Front Desk   1 months ago

    i like his button down shirt. i want one. where do you find it.

  • Alice Dixon
    Alice Dixon   1 months ago

    Sloths are my favourite animal! I was having a bad day but this video cheered me up. Thank you PBS Eons!

  • V Guyver
    V Guyver   1 months ago

    I got a really interesting one. How much sunlight the earth is getting now compared to the time of the dinosaurs and prior as the earth's rotation has slowed down.

  • Tina McLaughlin
    Tina McLaughlin   1 months ago

    Ooooooo! Me Too! Dogs turned into deals, whales you did. Manatees are worth a closer look too.

  • Strxwberry
    Strxwberry   1 months ago

    They went from friggin scary to ADORABLE

  • Kairi Suzuki
    Kairi Suzuki   2 months ago

    This is actually my favorite episode of PBS Eons because it has completely changed my view of animals.I learned that sloths are weird animals that have thrived in rainforests, caves, and even shallow waters by utilizing their versatile forearms and their ability to live on every kind of plants. Essentially “sloths” are NOT restricted to being suspensory.

  • KommanderChopp'ard
    KommanderChopp'ard   2 months ago

    Sloths are just done. They’ve been there, done that. They want nothing to do with any of that anymore. They are done.

  • Joel Aguilar
    Joel Aguilar   2 months ago

    Does eons have a podcast or something?? I'd love to be able to have it playing in the background while I'm cleaning

  • FeedMeSalt
    FeedMeSalt   2 months ago

    they went from those majestic creatures, To something so stupid it will freeze to death if you wet it.