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character: Sundial Designers
topic: Mathematics of Timekeeping
subject: Math
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character: Ancient Astronomers
topic: History of Time Measurement
subject: Math
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character: Geometry Experts
topic: Angles and Shadows in Sundials
subject: Math
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character: Optics Scientists
topic: Light and Shadow Interaction
subject: Math
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    https://www.yourstory.education/learn?character=Optics+Scientists&topic=Light+and+Shadow+Interaction&subject=Math
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