When did Horizon Season 30 Episode 21 air?
Horizon Season 30 Episode 21 aired on June 28, 1993.
Horizon
Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before.
Season 30 · Episode 21
Life is Impossible
Jun 28, 1993·1h
Horizon investigates how life began on Earth. Did it evolve on land surfaces on Earth, in the sea, or in space?
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How long is Horizon Season 30 Episode 21?
This episode runs for approximately 60 minutes.
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