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Magic Numbers: Hannah Fry's Mysterious World of Maths

Series 1

Episode 2: Expanded Horizons

Duration: 59 minutes

on BBC Four HD

Documentary series. Dr Hannah Fry travels down the fastest zip wire in the world to learn more about Newton's ideas on gravity. Show more

BBC Four HD

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.