We take sunlight for granted. In our hubris we produce our own version of light and imagine it an acceptable replacement. Oddly, we have a greater appreciation of plants' need for natural light than our own. Recent research now adds depression to the already lengthy list of illnesses associated with inadequate sunlight.
Now that Labor Day is in the record books, it's time to plan for winter survival if you live above about 39 degrees latitude in the northern hemisphere like I do as a denizen of Philadelphia. Every year, my Seasonal Affective Disorder seems worse. By February, I am wallowing in despair. I have learned that I need to preemptively plan a trip to somewhere warm. One option is a cruise.