The Secret Genius of Modern Life
Overview
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.
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.