Hannah Fry finds out how 1970s car crashes helped us to count our steps, why WWII dogfights led to a crucial health monitor and how fitness trackers are even being used to catch killers. Show more
Discover 11,125,414 listings and 293,746 playable programmes from the BBC
Hannah Fry finds out how 1970s car crashes helped us to count our steps, why WWII dogfights led to a crucial health monitor and how fitness trackers are even being used to catch killers. Show more
BBC Two is a lively channel of depth and substance, carrying a range of knowledge-building programming complemented by great drama, comedy and arts.
