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Image result for ancient time measuring devices | Ancient tools, Ancient artifacts, History of science
How was the second 'invented'? How are clocks built to exactly measure a second and how were computers taught the concept of this time length? - Quora
![Gnomon: Ancient Time Measuring Instrument Used By Babylonians, Egyptians And Chinese - Ancient Pages Gnomon: Ancient Time Measuring Instrument Used By Babylonians, Egyptians And Chinese - Ancient Pages](https://www.ancientpages.com/wp-content/uploads/2017/05/gnonomscincefacts11.jpg)
Gnomon: Ancient Time Measuring Instrument Used By Babylonians, Egyptians And Chinese - Ancient Pages
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