There is nothing like the beauty of a clear blue sky on a spring or summer day. Lying on a blanket as you look up, whether in soft grass or on a sandy beach, it's a time to take a deep breath and appreciate how small you are in comparison to everything above you. One might say, however, that a parade of fluffy white clouds floating by is far more interesting and peaceful. Clouds at a higher altitude barely seem to move at all, while clouds nearer to the ground sail past more quickly, all the tim...