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3000 BCE obelisk used the sun and the shadow it cast to tell time.
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A 12-hour clock using the sun and the shadow it casts on the gnomon to tell time
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Also called a clepsydra that used the flow of water to tell time
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lighting flames on ropes and marking candle wax to track the passing of time
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first tool to tell time not dependent on the sun
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First appreared in Europe
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Analog clocks that people could wear or carry first created
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The earth revolves around the sun annually, creating seasons. The earth rotates in 24 hour periods, creating day and night.