Ancient Fauna, Flora & Fungi

    Ancient Fauna, Flora & Fungi

    Video thumbnail: Eons How the Turtle Got Its Shell

    Eons

    How the Turtle Got Its Shell

    Where did turtles come from? And how did the they get their shells?

    How the Turtle Got Its Shell

    Video thumbnail: Eons How the Squid Lost Its Shell

    Eons

    How the Squid Lost Its Shell

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

    How the Squid Lost Its Shell

    Video thumbnail: Eons When Birds Had Teeth

    Eons

    When Birds Had Teeth

    How did Archaeopteryx relate to today’s birds? Its teeth provide a major clue.

    When Birds Had Teeth

    Video thumbnail: Eons Why Triassic Animals Were Just the Weirdest

    Eons

    Why Triassic Animals Were Just the Weirdest

    Why the Triassic was full of creatures that look a lot like other, more modern species.

    Why Triassic Animals Were Just the Weirdest

    Video thumbnail: Eons The Rise and Fall of the Bone-Crushing Dogs

    Eons

    The Rise and Fall of the Bone-Crushing Dogs

    What happened to the biggest dogs that ever lived?

    The Rise and Fall of the Bone-Crushing Dogs

    Video thumbnail: Eons How Horses Took Over North America (Twice)

    Eons

    How Horses Took Over North America (Twice)

    Horses vanished from North America for 10,000 years until a mammal brought them back.

    How Horses Took Over North America (Twice)

    Video thumbnail: Eons When Fish Wore Armor

    Eons

    When Fish Wore Armor

    420 million years ago, some fish wore armor – and it may have served a surprising purpose.

    When Fish Wore Armor

    Video thumbnail: Eons When Fish First Breathed Air

    Eons

    When Fish First Breathed Air

    Before a group of fish could live on dry land, they acquired the ability to breathe air.

    When Fish First Breathed Air

    Video thumbnail: Eons When Insects First Flew

    Eons

    When Insects First Flew

    Insects were the first animals to fly. Scientists are still working on how it happened.

    When Insects First Flew