Technology 2-minute read

A moving shadow keeps time.

A sundial mounted on a building.

The Sun's apparent motion gives a shadow a predictable path. Discover how different dial designs translate that path into a reading of time.

The Sun's apparent motion gives a shadow a predictable path. Discover how different dial designs translate that path into a reading of time.

Source: Wikipedia

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Wilson44691 / Wikimedia Commons / Public domain

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