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. Every autumn, millions of Americans make ...

Autumn is rapidly approaching ... and in Britain oak leaves are falling a week later than 30 years ago. Fall is not an exclusively US term. The word "fall"– short for "falling of the leaf ...

Every autumn we revel in the beauty of the fall colors. The mixture of red, purple, orange and yellow is the result of chemical processes that take place in the tree as the seasons change from summer ...