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  • EarthViewer

    EarthViewer

    Click & Learn

    Download the accompanying student worksheet under "Downloads." What did Earth look like 250 million years ago? Or 1 billion years ago? Or 4.5 billion years ago? EarthViewer is an interactive tool that allows you to explore the science of Earth's deep history.

  • Geological History of Oxygen

    Geological History of Oxygen

    Click & Learn

    Explore the changes in oxygen levels throughout Earth’s history and discover their impact on life.

  • EarthViewer Data Files

    EarthViewer Data Files

    Activity

    Summaries and links to the data files used to create the charts in EarthViewer, including the APK file to manually install the app.

  • Daly's Model of Subduction

    Daly's Model of Subduction

    Animation

    (2 min 19 sec) An early model of continental drift proposed that parts of continental plates can sink into the mantle, allowing for movement.

  • Continental Movement Over the Past 200 Million Years

    Continental Movement Over the Past 200 Million Years

    Animation

    (1 min 1 sec) The breakup of a supercontinent into several smaller continents explains the distribution of fossil and geologic evidence.

  • Arctic Island Was a Tropical Island 500 Million Years Ago

    Arctic Island Was a Tropical Island 500 Million Years Ago

    Animation

    (47 sec) Reconstructing past continental plate movements reveals the island of Spitsbergen was tropical 500 million years ago.

  • Changing Planet: Past, Present, Future

    Changing Planet: Past, Present, Future

    Lecture

    Has Earth changed over deep time? How did Earth shape life and life shape Earth? What does Earth's climate in the distant past tell us about the future?