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 ...

Those containing the word “Momiji” (maple) include “hatsu-momiji” (combination of yellow-green and pale yellow-green suggesting colors of maple leaves at the beginning of autumn), “ki ...