Whose idea was it to split the day into intervals and decided the duration of each interval? Also how did the units for time become so universal? The hour, minute, and second are the only units to be used by every country in the world. How did this idea spread, or did every civilization come up with it on their own?
hi! there's always room for someone to contribute more on this topic, but FYI, there's a section on this in the FAQ*
*see the link on the sidebar or the wiki tab