When did Horizon Season 42 Episode 20 air?
Horizon Season 42 Episode 20 aired on December 15, 2005.
Horizon
Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before.
Season 42 · Episode 20
The Ghost in Your Genes
Dec 15, 2005·1h
The controversial science of epigenetics suggests you may inherit a lot more than you imagine from your forebears. The scientists who believe your genes are shaped in part by your ancestors' life experiences.
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How long is Horizon Season 42 Episode 20?
This episode runs for approximately 60 minutes.
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