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The Vernal Equinox is coming! Only on that day, locations at the same longitude experience sunrise at the same time. Explore this unique connection to be ready for next week's Time Clues. More. . .

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Mystery Class Photoperiod Map
 
Reasons for Seasons: Model

Sunrise on the Equinox©

 

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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