Next to 'why is the sky blue' and 'where do babies come from,' 'why do leaves turn color in the fall' might be the most frequently asked question about nature. Next to 'why is the sky blue' and 'where ...

A meandering stream carries the eye from the foreground deep into the scene where short, staccato strokes of color create the fall foliage backdrop. The sky above is a mottled blend of warm and ...