Mind's Eye / Tide Mill / Colour It Snake The Nature of Things : Season 22 Episode 14

Mind's Eye: A report on recent research into how the brain constructs vision from the information supplied by the eyes. Tide Mill: A look at a grist mill at Ealing in England which for two centuries has run on tidal power. Colour It Snake: A discussion of the ways in which the basic pigments in snake scales are arranged to produce colour patterns fitting various survival needs.