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  • Discovering the Wallace Line

    Discovering the Wallace Line

    Activities

    This activity supports the HHMI short film The Origin of Species: The Making of a Theory. Students are presented with a map of the Malay Archipelago and some field notebooks with observations of animals. By plotting which animals are found on which island, the students discover the Wallace Line—a sharp boundary that separates distinct Asian and Australian fauna. 

  • EarthViewer Data Files

    EarthViewer Data Files

    Activities

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

  • The Principle of Isostasy

    The Principle of Isostasy

    Clips

    (2 min 39 sec) Continents rose in elevation after ice sheets from the last ice age retreated. This suggested that the underlying mantle is pliable.

  • Stratigraphic Principles

    Stratigraphic Principles

    Clips

    (2 min 21 sec) Dr. John Shea demonstrates the two main principles in the study of rock layers: superposition and association.