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  • Young Students Recognize a Transitional Fossil

    Young Students Recognize a Transitional Fossil

    Clips

    (4 min 44 sec) Neil Shubin brought the fossil of Tiktaalik to his daughter’s first grade class to see what the students would make of it.

  • 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.

  • Rift Valleys of Africa and Plate Tectonics

    Rift Valleys of Africa and Plate Tectonics

    Clips

    (2 min 14 sec) African rift valleys were formed by the separation of tectonic plates. Water flows down to the valley floors, creating rivers and lakes.

  • Stickleback Environment

    Stickleback Environment

    Clips

    (1 min 27 sec) At the end of the ice age, the retreating ice sheet created many new lakes, some of which were colonized by sticklebacks.

  • Dog Breeding

    Dog Breeding

    Clips

    (1 min 53 sec) The many forms of dogs that exist today were all created through selective breeding from the dog's ancestor, the wolf. In a span of less than 10,000 years, breeders have changed traits and body shapes of dogs by artificial selection-for example, emphasizing different aspects of hunting and herding behavior.

  • Breeding Corn from Teosinte

    Breeding Corn from Teosinte

    Clips

    (52 sec) Corn was originally bred from the teosinte plant by native Mexican farmers. The morphologies of modern-day corn and teosinte plants are compared to illustrate how artificial selection can bring about dramatic changes in plants.

  • Fossil Record of Stickleback Evolution

    Fossil Record of Stickleback Evolution

    Clips

    (2 min 34 sec) A quarry site in Nevada carries the evolutionary history of a population of stickleback fish that resided there when it was a freshwater lake.

  • Clonal vs Sexual Reproduction

    Clonal vs Sexual Reproduction

    Clips

    (8 min 56 sec) What does a stack of fruits and vegetables have to do with the theoretical advantages of sexual reproduction? Find out in this demonstration with student audience members and Dr. David Page.