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Discovery Channel Documentaries: Season 1

1x158 Why Dogs Smile & Chimpanzees Cry (1)
TV-G

  • Discovery
  • 45m
  • United States
  • English
  • Documentary
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.
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