Calculate photoperiod using sunrise/sunset data to estimate latitude.

• Look up Sunrise/Sunset
• Record and Graph

• January 31
• February 7
• February 14
• February 21
• February 28
• March 7
• March 14
• March 21
• March 28
• April 4
• April 11

Narrow the search from continent to country to city.

• March 21
• March 28
• April 4
• April 11

• Mystery Class #1
• Mystery Class #2
• Mystery Class #3
• Mystery Class #4
• Mystery Class #5
• Mystery Class #6
• Mystery Class #7
• Mystery Class #8
• Mystery Class #9
• Mystery Class #10