How Do You Know What Time it Is?

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Robert E. Wells – TIME is a mystery! You can’t see or hear it… How did people keep track of time years ago? Were there always clocks around? Read about sundials, sand-glasses and pendulums. Learn more about the sun and moon.

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Robert E. Wells – TIME is a mystery! You can’t see or hear it… How did people keep track of time years ago? Were there always clocks around? Read about sundials, sand-glasses and pendulums. Learn more about the sun and moon.

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