We hope you enjoy this enhanced CD, which adds full text and pictures to the experience of listening to the album. Darkness and Light is one of a series of disks produced by KUHF-Houston Public Radio. The Engines of Our Ingenuity, created by Dr. John Lienhard, is a short daily program available to radio stations for rebroadcast upon request. You can read and hear more at: uh.edu/engines. Permission for any use in an academic context is explicitly granted and encouraged.