Why Dogs Smile and Chimpanzees Cry

    Is it human conceit to attribute emotions to animal actions, or are emotions basic to life on earth? Wildlife filmmakers and scientists make a convincing argument for the latter in this gripping film.
    Documentary
    • Runtime: 1 hour and 40 minutes
    • Release Date: January 1, 1999
    Why Dogs Smile and Chimpanzees Cry
    Sigourney Weaver