Hannah Fry Instagram – The Secret Genius of Modern Life is back on our screens tonight as Hannah 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.
Watch tonight on BBC Two at 8pm
@bbctwo #HannahFry | Posted on 08/Dec/2022 23:04:20
