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Looking for a Clue? It's time to zero in on the line that divides the globe into Eastern and Western Hemispheres. More. . .

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Mystery Class Photoperiod Map
 
Reasons for Seasons: Model

Snow monkey©Stamp Design Royal Mail Group Ltd (1984)

 

Mystery Class is a global game of hide-and-seek. Follow photoperiod clues to search for ten secret sites around the world. Track sunlight to solve a mystery—and discover the reasons for seasons along the way.

 

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