Horizon
Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before.
Season 16 · Episode 12 ·
The Fight to Be Male
This episode of Horizon looks at the recent scientific research into how humans become male or female.
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Episode 12 of season 16 of Horizon: “The Fight to Be Male”. Aired 1979-05-21. Watch it online free on ZapFlix.