Note about Cover Image
The beautiful cover image shows a small portion of a rock art site in Utah known as the Great Gallery, which might have been painted more than 7000 years ago. This image is by Bret Webster and won the NASA Astronomy Picture of the Day May 19, 2010 among other awards. This image captures one aspect that humans in all societies have pondered and often tried to influence, sometimes by painting images: our relationship to each other and our place in the world and the greater cosmos.