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Where to watch "The Secret Genius of Modern Life"
6. Trainer
No release date yet
Hannah discovers how delicious breakfast waffles helped to transform our sneaker soles.
5. Fitness Tracker
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Hannah finds out how 1970s car crashes helped us to count our steps and improve fitness.
4. The Electric Car
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Hannah Fry discovers how a breakthrough in camcorder batteries led to an electric empire.
3. Virtual Assistants
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Hannah Fry delves into the inner workings of virtual assistants, such as Amazon's Alexa.
2. The Food Delivery App
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Hannah Fry tucks into the staggering technology behind the latest food delivery apps.
1. The Bank Card
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Hannah Fry examines the bank card, including a surprising, sinister backstory.
