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Showing 1-4 of 4 Resources
  • It's a Fishapod!

    It's a Fishapod!

    Article

    This article by Sean B. Carroll tells the story of the search for and discovery of Tiktaalik, an animal with a mix of fish and tetrapod features—a fishapod! It supplements the short film Great Transitions: The Origin of Tetrapods, starring Neil Shubin.

  • Weighing the Evidence for a Mass Extinction—On Land

    Weighing the Evidence for a Mass Extinction—On Land

    Activity

    A lesson in which students analyze graphs and data on pollen grains and fern spores to form a picture of the living landscape before and after the K-T mass extinction.

  • Determining the Size and Energy of the K-T Asteroid

    Determining the Size and Energy of the K-T Asteroid

    Activity

    A lesson in which students calculate the mass, size, and kinetic energy of the K-T asteroid based on the total abundance of iridium in the K-T boundary layer.

  • Weighing the Evidence for a Mass Extinction—In the Ocean

    Weighing the Evidence for a Mass Extinction—In the Ocean

    Activity

    A hands-on activity in which students see first-hand the difference in foraminifera fossils below and above the K-T boundary. Also available in Spanish.