When did Horizon Season 7 Episode 36 air?
Horizon Season 7 Episode 36 aired on December 21, 1970.


Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before.
Horizon reports on some of the pure scientific research work carried out at the Smithsonian Tropical Research institute.
Direct answers for episode-level questions and details.
Horizon Season 7 Episode 36 aired on December 21, 1970.
This episode runs for approximately 60 minutes.
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