We're well into the fall season here in the northern hemisphere, so Sara and Casey take a look at what causes those brilliant fall colors, and why trees lose their leaves in the fall, anyway. 
Resources for this episode:
National Weather Service: Why Do We Have Seasons?
Young People's Trust for the Environment: Why Do Trees Lose Their Leaves in Winter?
Three Rivers Parks: Why Do Leaves Change Color in Fall?
Three Rivers Parks: Why Do Some Trees Keep Their Leaves Through Winter?
Forestry and Land Scotland: Why Do Trees Lose Their Leaves?
University of Florida: Florida Fall Color
WCJB: Where to Find Fall Colors in NCFL
 

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