When did Horizon Season 28 Episode 10 air?
Horizon Season 28 Episode 10 aired on March 4, 1991.


Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before.
This Horizon interview presents Dr. Ulysses Seal who believes the "frozen zoo" concept is the best way to save vanishing species for the future generations.
Direct answers for episode-level questions and details.
Horizon Season 28 Episode 10 aired on March 4, 1991.
This episode runs for approximately 60 minutes.
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