When did Horizon Season 7 Episode 28 air?
Horizon Season 7 Episode 28 aired on October 12, 1970.


Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before.
Horizon reports on the work of the British Nature Conservancy and how scientists are trying to find out about nature.
Direct answers for episode-level questions and details.
Horizon Season 7 Episode 28 aired on October 12, 1970.
This episode runs for approximately 60 minutes.
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