How did we come up with time measurement?

Subject: How did we come up with time measurement?

Date: Sun Nov 9 17:59:43 2008
Posted by No name entered.
Grade level: 10-12 School: Richmond Heights
City: No city entered. State/Province: No state entered. Country: USA
Area of science: Science History
ID: 1226278783.Sh

Message:


I know a lot is arbitrary.  How do they know we're in the same place as a year 
ago?  How do they know how many million oscillations occur to make "a 
second"?  I get so confuzzled every time I look at a clock (but I can tell 
time!).

Re: How did we come up with time measurement?

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