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Canals: The Making of a Nation

Geology

Duration: 29 minutes

on BBC Four

Available for years

How the process of building Britain's canals resulted in furthering geological knowledge, as surveyor William Smith created the first geological map of England and Wales. Show more

BBC Four

About BBC Four

BBC Four reflects arts, music and culture with an ambitious range of intellectually and culturally enriching programmes, taking an expert and in-depth approach to its subjects.