Extras

    Video thumbnail: NOVA Animal Minds: Dogs Preview

    NOVA

    Animal Minds: Dogs Preview

    How do dogs, sharks, dolphins, or birds experience the world?

    Animal Minds: Dogs Preview

    Video thumbnail: NOVA The Mysteries of Optic Flow

    NOVA

    The Mysteries of Optic Flow

    Birds use a trick of the eye called “optic flow” to zip through forests without colliding.

    The Mysteries of Optic Flow

    Video thumbnail: NOVA Five Dogs With Crazy Résumés

    NOVA

    Five Dogs With Crazy Résumés

    Learn about the traits we most prize in dogs, and the bizarre jobs they were bred for.

    Five Dogs With Crazy Résumés