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  • Moth Mimicry: Using Ultrasound to Avoid Bats

    Moth Mimicry: Using Ultrasound to Avoid Bats

    Scientists at Work

    (10 min 24 sec) This video follows scientists as they uncover the ways in which moth species in Gorongosa National Park use ultrasound to avoid being eaten by bats.

  • The Origin of Flight: What Use Is Half a Wing?

    The Origin of Flight: What Use Is Half a Wing?

    Scientists at Work

    (8 min 16 sec) Biologist Ken Dial's study of how young birds use their developing wings sheds light on the evolution of flight in birds.

  • Young Students Recognize a Transitional Fossil

    Young Students Recognize a Transitional Fossil

    Clip

    (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.

  • Evolution: Constant Change and Common Threads

    Evolution: Constant Change and Common Threads

    Lecture

    How has the amazing diversity of plants and animals evolved? What can fossils, butterflies, and stickleback fish tell us about the deep common ancestry of all living forms?

  • Stickleback Environment

    Stickleback Environment

    Clip

    (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.

  • Fossil Record of Stickleback Evolution

    Fossil Record of Stickleback Evolution

    Clip

    (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.

  • The Meaning of Sex: Genes and Gender

    The Meaning of Sex: Genes and Gender

    Lecture

    Four talks focus on sex determination—the molecular and genetic mechanisms that determine whether an organism will be male, female or a hermaphrodite.

  • Clonal vs Sexual Reproduction

    Clonal vs Sexual Reproduction

    Clip

    (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.

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