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  • Popped Secret: The Mysterious Origin of Corn

    Popped Secret: The Mysterious Origin of Corn

    Short Films

    (17 min 51 sec) Where did corn come from? Genetic and archeological data point to what may seem like an unlikely ancestor: a wild Mexican grass called teosinte. Also available in Spanish.

  • Dog Breeding

    Dog Breeding


    (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


    (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.