Water: it goes without saying that it's crucial to life on this planet.  The surface of the earth is more than 70% water, and the human body is composed of up to 60% water.  We humans feel an intimate connection with water and have expressed that connectivity in our art for thousands of years.  No surprise, then that photographers are attracted to water in its many forms and guises: everything from oceans, lakes and rivers to the sheen of rain on wet pavement.