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  • Videos, Slides, Films

    Cracking your genetic code

    Author
    a Nova production by Holt Productions, LLC for WGBH ; written, produced, and directed by Sarah Holt
    Date
    [2012]
    Available As
    Physical
  • Videos, Slides, Films

    Mass extinction : life at the brink

    Author
    produced by Tangled Bank Studios in association with Holt Productions and Smithsonian Networks ; producer/director, Sarah Holt ; writers, Thomas Friedman, Sarah Holt
    Date
    [2015]
    Edition
    Wide screen.
    Available As
    Physical

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