Who discovered 24 hours in a day?

Related questions

1. Does Alaska have two time zones?
2. Which country has the latest time zone?
3. What is current est time in USA?
4. Does Michigan have 2 time zones?
5. Why do we kiss at midnight on New Year's Eve?
6. Why are there time zones?
7. Which country has no night only day?
8. How do you determine time zones?
9. Which country has the shortest night time?
10. Why is there 60 seconds in a minute?

Tags

1. #egyptians
2. #beginning
3. #night
4. #comes
5. #based
6. #measured
7. #devices
8. #ancient
9. #stars
10. #divided
11. #hours
12. #clocks
13. #observations
14. #added
15. #twilight
16. #shadow
17. #another