Science and Nature

Eons

Join hosts Hank Green, Kallie Moore, and Blake de Pastino as they take you on a journey through the history of life on Earth. From the dawn of life in the Archaean Eon through the Mesozoic Era — the so-called “Age of Dinosaurs” -- right up to the end of the most recent Ice Age.

When Mammals Only Went Out At Night

11m 9s

For decades, scientists believed dinosaurs were diurnal and tiny mammals were nocturnal. But as researchers have uncovered more mammalian fossils and studied the biology of different dinosaur species, they’ve found some surprising results.

Episodes

  • When Mammals Only Went Out At Night: asset-mezzanine-16x9

    When Mammals Only Went Out At Night

    S4 E10 - 11m 9s

    For decades, scientists believed dinosaurs were diurnal and tiny mammals were nocturnal. But as researchers have uncovered more mammalian fossils and studied the biology of different dinosaur species, they’ve found some surprising results.

  • How a Mass Extinction Event Created the Amazon: asset-mezzanine-16x9

    How a Mass Extinction Event Created the Amazon

    S4 E9 - 7m 55s

    The Amazon rainforest of South America is a paradise for flowering plants. But long ago, the landscape that we now think of as the Amazon looked very different. And would you believe that the entire revolution of the Amazon began with just one day?

  • How a Supervolcano Ignited an Evolutionary Debate: asset-mezzanine-16x9

    How a Supervolcano Ignited an Evolutionary Debate

    S4 E8 - 9m 59s

    The Toba supervolcano was the biggest explosive eruption of the last 2.5 million years. And humans were around to see it, or at least feel its effects! But what were those effects?

  • How Pollination Got Going Twice: asset-mezzanine-16x9

    How Pollination Got Going Twice

    S4 E7 - 9m 32s

    The world of the Jurassic was a lot like ours - similar interactions between plants and insects were happening, but the players have changed over time. Because it looks like pollination by insects actually got going twice.

  • The Creature That Stumped Darwin: asset-mezzanine-16x9

    The Creature That Stumped Darwin

    S4 E6 - 6m 46s

    Toxodon was one of the last members of a lineage that vanished 11,000 years ago after thriving in isolation for millions of years. And its fossils would inspire a revolutionary thinker to tackle a bigger mystery than Toxodon itself: evolution.

  • How the Starfish Got Its Arms: asset-mezzanine-16x9

    How the Starfish Got Its Arms

    S4 E5 - 10m 53s

    The story of how the starfish got its arms reminds us that even animals that might be familiar to us today can have incredibly deep histories - ones that stretch back almost half a billion years.

  • Where Are All the Medium-Sized Dinosaurs?: asset-mezzanine-16x9

    Where Are All the Medium-Sized Dinosaurs?

    S4 E4 - 11m 1s

    The remains of medium-sized predatory dinosaurs are pretty rare in places where giant predators like T. rex existed. Which is weird, because that’s just not how ecosystems work today.

  • The Island of the Last Surviving Mammoths: asset-mezzanine-16x9

    The Island of the Last Surviving Mammoths

    S4 E3 - 8m 6s

    The Wrangel Island mammoths would end up being the final survivors of a once widespread genus. In their final years, after having thrived in many parts of the world for millions of years, the very last mammoths that ever lived experienced what’s known as a mutational meltdown.

  • The Traits That Spawned the Age of Mammals: asset-mezzanine-16x9

    The Traits That Spawned the Age of Mammals

    S4 E2 - 7m 44s

    Lots of the traits we think of as defining us as mammals show up pretty early, during the time of the dinosaurs. And, in some cases, they show up a lot earlier and in things that weren’t mammals at all.

  • Did These Giant Sloths Poop Themselves to Death?: asset-mezzanine-16x9

    Did These Giant Sloths Poop Themselves to Death?

    S4 E1 - 10m 1s

    At Tanque Loma, at least 22 giant ground sloths in the genus Eremotherium met their end. Of the five hypotheses that researchers proposed for what killed the sloths, the best supported one right now is that they died surrounded by their own poop.

Extras + Features

  • A Quick Introduction to Eons: asset-mezzanine-16x9

    A Quick Introduction to Eons

    S1 - 1m 28s

    Join hosts Hank Green, Kallie Moore, and Blake de Pastino as they take you on a journey through the history of life on Earth. From the dawn of life in the Archaean Eon through the Mesozoic Era — the so-called “Age of Dinosaurs” -- right up to the end of the most recent Ice Age. The evolutionary history of mammals including humans and other modern species is explored with these amazing paleontology

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