2 Season
12 Episode
The Secret Genius of Modern Life - Season 1 Episode 5 Fitness Tracker
Hannah Fry finds out how 1970s car crashes helped us to count our steps, why WWII dog-fights led to a crucial health monitor and how fitness trackers are even being used to catch killers.
- Year: 2023
- Country: United Kingdom
- Genre: Documentary
- Studio: BBC Two
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