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Horizon

2018

Episode 3: How to Build a Time Machine

Duration: 59 minutes

on BBC Four

Horizon meets scientists working on the cutting edge of discovery - people who may discover how to build wormholes, manipulate entangled photons or build functioning time crystals. 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.