Horizon
Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before.
Season 22 · Episode 1 ·
Colourful Notions
Documentary about colour perception based on the theories of Dr. Edwin Land, which oppose the long-held three-receptor theory of colour vision
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Episode 1 of season 22 of Horizon: “Colourful Notions”. Aired 1985-01-07. Watch it online free on ZapFlix.