Chapter 5 in Stephen Hawking's "A Brief History of Time" opens with the paragraph: "Aristotle believed that the universe was made up of four basic elements - earth, air, fire and water. These elements were acted on by two forces: gravity, the tendency for earth and water to sink, and levity, the tendency for air and fire to rise. This division of the contents of the universe into matter and forces is still used today."
This paragraph struck me, considering a recent visit to see four major murals inside downtown Sacramento's U.S. Bank Plaza. This American highrise has a great exterior and a wonderful lobby. The paintings that follow give Aristotle's four basic elements a California twist. The mural artist is Richard Piccolo.
Earth
Air
Water
Fire