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The Secret Genius of Modern Life

Series 1

Bank Card

Duration: 59 minutes

on BBC Two Wales

Available for years

Hannah Fry takes a look at the bank card, the digital key to accessing cash, and finds out how its extraordinary innovations have some surprising and sinister origins. Show more

BBC Two Wales

About BBC Two

BBC Two is a lively channel of depth and substance, carrying a range of knowledge-building programming complemented by great drama, comedy and arts.