Why Dogs Smile and Chimpanzees Cry (1999)

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Movie Info

Animal behavior and emotions, from happiness to sorrow, are investigated by researchers. Included: the bond between a mother and her offspring; altruistic behavior. Also: the evolution of the mammalian brain. Sigourney Weaver narrates.
Rating:
NR
Genre:
Documentary
Directed By:
Runtime:
Studio:
Discovery

Cast

Sigourney Weaver
as Narrator

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