When the first person set the very first clock, how did they know what time to set it to? We go on a quest into the history of timekeeping, from sundials to atomic clocks. Show more
Discover 11,128,835 listings and 277,915 playable programmes from the BBC
When the first person set the very first clock, how did they know what time to set it to? We go on a quest into the history of timekeeping, from sundials to atomic clocks. Show more