The Trouble With Trilobites

  • Published on: 26 June 2017
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    Trilobites are famous not just because they were so beautifully functional, or because they happened to preserve so well. They’re known the world over because they were everywhere!

    This episode was written by Blake de Pastino.

    Thanks to Franz Anthony, Julio Lacerda, Lucas Lima and Studio 252mya for their illustrations. You can find more of their work here:

    Produced in collaboration with PBS Digital Studios:


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  • Runtime : 6:55
  • trilobites PBS hank green dinos dinosaur john green complexly paleo paleontology natural history scishow crash course pbs digital studios Cambrian Period arthropod the great dying extinction


  • Kah Deh
    Kah Deh   2 days ago

    What about horseshoe crabs?

  • Patti Feit
    Patti Feit   4 days ago

    Has anyone else noticed that, for at least 2 of the top 5 mass extinctions (252 mya and 66 mya), scientists are arguing about whether it was caused by rampant volcanism or a meteor? Is it possible that they're related? Like maybe a giant bloody rock slamming into the planet might have caused the volcanism?

  • mew umu
    mew umu   5 days ago

    Heck yeah! Startrek title!!

  • Leto85
    Leto85   1 weeks ago

    I feel strangle sad for these little critters now.But thank you still for this well informative video. It's very inspirational.

  • Blind Squid
    Blind Squid   1 weeks ago

    Meanwhile down in the Mariana trench some trilobites are hanging out watching this on their t-phones & giggling.

  • Jallamedalla
    Jallamedalla   1 weeks ago

    I do NOT understand how the horse shoe crab is not an ancestor of the trilobite...

  • Vipere
    Vipere   1 weeks ago

    I miss you trilos! 🥺

  • OrphanPaper
    OrphanPaper   1 weeks ago

    if you call success give the plant its 6the mass extinction and the answer to the question is they evolved they changed and did not go extinct there just different

  • lawlblogger
    lawlblogger   2 weeks ago

    They probably just evolved into roaches and rolly pollys.

  • Stephen Roux
    Stephen Roux   2 weeks ago

    You're mispronouncing trilobite. The first I is a short I not a long I.

  • Kemal Batavian
    Kemal Batavian   2 weeks ago

    Just like coeleacanth fishes.., some experts found their fossils and said that they live and extincted several million years ago. Guess what..? Some living exactly the same fishes were caught alive in 1990's at south east asia and other region.!Palaentology is unreliable !

  • -p Catalano
    -p Catalano   2 weeks ago

    Predation first appeared in the Cambrian. I bet the dying thought of the first animal to be eaten was "WTF???"

  • Broockle
    Broockle   2 weeks ago

    Trilobites are extinct... but we still have Horseshoe crabs ;D

  • Brian M
    Brian M   2 weeks ago

    And according to Gretchen this was all caused by man and their greed of cars and factories.

  • You Tube
    You Tube   3 weeks ago

    It's easy to ponder at a live horseshoe crab and question whether it had any ties to trilobites.

  • Karma
    Karma   3 weeks ago

    "trilobite is kill""no"

  • unknown
    unknown   3 weeks ago

    Who came from deep town?

  • keith corrigan
    keith corrigan   3 weeks ago

    I have seen trilobites in my garden they are called Slater's and woodlice!😁🌞

  • JulzyBoy
    JulzyBoy   3 weeks ago

    But what if some trilobites are still alive in some deep areas of the ocean? It honestly seems likely.But how would you go about finding them?

  • planescaped
    planescaped   3 weeks ago

    "20 million years after the arrival of jaws spiked trilobites began to appear"I keep needing to remind myself of the amount of time that has to pass for these evolutionary changes... it really is unfathomable.

  • Waynem Lambert
    Waynem Lambert   3 weeks ago

    Cockroaches of the sea !!!Died do to global cooling and today the climate is catching back up to what it once was , but we only have 12 year left till we all die ......

  • Misty Boyer
    Misty Boyer   4 weeks ago

    Trilobites and isopods look very similar

  • shoved to the right?
    shoved to the right?   1 months ago

    See all i ever hear is how many species died off and went extinct... if everything died how did we get here? i think as many creatures vanished because they evolved as went extinct and frankly that story is much more interesting than doom and death! Maybe you should show some of the winners for a change instead of all the final losers!

  • shoved to the right?
    shoved to the right?   1 months ago

    I have their descendants (visually at least) living in my garden! We call them woodlice!

  • Med Otaku
    Med Otaku   1 months ago

    0:59 You tellin' me that horseshoe crabs and sea lice aren't at all related to trilobites?

  • VioletWhirlwind
    VioletWhirlwind   1 months ago

    What about things like Horseshoe crabs, giant isopods, and triops (not to mention pill bugs) ? Are they related to trilobites, or just a case of convergent evolution?

  • M M
    M M   1 months ago

    New show: ”Bear Grylls VS. Terry the trilobite”

  • Bush Master Flash
    Bush Master Flash   1 months ago

    So, trilobites also went extinct because they didn't have a space program.

  • Amy Jones
    Amy Jones   1 months ago

    So if a meteor of that size hit the Earth could it have impacted tectonic plates enough to start volcanic activity?