Eons

From the dawn of life in the Archaean Eon through the Mesozoic Era — the so-called “Age of

Episodes

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

    S4 Ep10 |
    Scientists discover dinosaurs and tiny mammals' sleep habits are different than thought.
  • How the T-Rex Lost Its Arms: asset-mezzanine-16x9
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    How the T-Rex Lost Its Arms

    S1 Ep47 |
    Tyrannosaurus rex had tiny arms. How did this happen, and why did it keep them?
  • Why Triassic Animals Were Just the Weirdest: asset-mezzanine-16x9
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    Why Triassic Animals Were Just the Weirdest

    S1 Ep44 |
    Why the Triassic was full of creatures that look a lot like other, more modern species.
  • That Time It Rained for Two Million Years: asset-mezzanine-16x9
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    That Time It Rained for Two Million Years

    S1 Ep43 |
    234 million years ago, the climate suddenly changed for the wetter.
  • From the Fall of Dinos to the Rise of Humans: asset-mezzanine-16x9
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    From the Fall of Dinos to the Rise of Humans

    S1 Ep42 |
    The Cenozoic marks the rise of organisms that look a lot like us.
  • The Weird, Watery Tale of Spinosaurus: asset-mezzanine-16x9
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    The Weird, Watery Tale of Spinosaurus

    S1 Ep41 |
    In 1912, a fossil collector discovered the world’s only known semi-aquatic dinosaur.
  • The Age of Reptiles in Three Acts: asset-mezzanine-16x9
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    The Age of Reptiles in Three Acts

    S1 Ep40 |
    Reptiles in time grew to become some of the largest forms of life ever to exist on earth.
  • How the Chalicothere Split In Two: asset-mezzanine-16x9
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    How the Chalicothere Split In Two

    S1 Ep39 |
    How did two of the same kind of animal end up looking so different?
  • How the Squid Lost Its Shell: asset-mezzanine-16x9
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    How the Squid Lost Its Shell

    S1 Ep38 |
    Ancestors of cephalopods all had shells until it proved to be their biggest weakness.

About 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.