Mystery Class
It's time for the first set of Continent, Country, and City clues. Week by week, these clues reveal fun facts that will help you progressively narrow your search.
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Mystery Classes Photoperiod Data
Local Photoperiod Data
Continent, Country, City Clues
Graph this week's photoperiod data and then revisit your prediction graph from Week #6. Explore patterns and rates of change. Make new predictions!
Next Update March 25, 2016
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