3 ms·
Think about that: A clock starts at zero. A day has 24 hours but there is not a twenty-fourth hour. Midnight is 0:00.
by ralfd 15y ago
Think about that:
A clock starts at zero. A day has 24 hours but there is not a twenty-fourth hour. Midnight is 0:00.
- gnosis 15y agoClocks are a relatively recent invention.
- ralfd 15y agoIn fact Clocks are one of the oldest inventions of the human mind. 4000 years ago in Babylon water clocks (clepsydra) were used. Also in old China. http://www.nist.gov/pml/general/time/images/water_1.gif http://www.nist.gov/pml/general/time/images/water_1.gif There is a 2050 year old Horologia tower in Athen ("Tower of the Winds"): "This structure tracked a 24-hour day using both sundials and mechanical hour indicators"
- gnosis 15y agoHumans have been around for more than 200,000 years (up to 2.5 million years, depending on how you define the term "human"). So even 4,000 years ago is relatively recent on the scale of human history.