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  • Jurassic Mammal Teeth

    Jurassic Mammal Teeth

    Image of the Week

    A three-dimensional model of a fossilized jaw from a mouse-sized mammal that lived during the Jurassic Period.

  • Comparative Anatomy of the Domestic Chicken

    Comparative Anatomy of the Domestic Chicken

    Click & Learn

    Trace the evolutionary history of birds by comparing the shapes and structures of certain bones in a chicken to those of some of its extinct and living relatives. Also available in Spanish.