americans started it. the first proposal was a single time for all around the planet, so now it's 4:00 all around the planet. people didn't like that, because 4:00 is day somewhere and night somewhere else. so there was this arrangement of dividing the planet in regions, all with the same time. so all of england, all of britain has the same time. this is artificial, obviously, because -- and remarkably, a few years later, there was a guy in switzerland who was checking the patent for synchronizing clocks in different train stations. his name was albert einstein. he realized that if you study carefully time, it's not possible to synchronize clocks. time goes at a different speed depending on how you move and where you are. >> and you can never say there is a specific time.