Extras

    Video thumbnail: Science Trek D4k: The Web Show: Animal Migration

    Science Trek

    D4k: The Web Show: Animal Migration

    Do animals use the stars to migrate?

    D4k: The Web Show: Animal Migration

    Video thumbnail: Science Trek D4K: Animal Migration Video Short

    Science Trek

    D4K: Animal Migration Video Short

    What animals besides birds migrate and why?

    D4K: Animal Migration Video Short