When did Horizon Season 13 Episode 5 air?
Horizon Season 13 Episode 5 aired on February 2, 1976.


Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before.
Horizon examines the projected expansion of the coal mining industry.
Direct answers for episode-level questions and details.
Horizon Season 13 Episode 5 aired on February 2, 1976.
This episode runs for approximately 60 minutes.
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