Greg Graffin is the lead singer and a songwriter in Bad Religion. Greg obtained his PhD in zoology at Cornell University and a master's in geology from UCLA. He has lectured at UCLA and Cornell, and is coauthor, with Steve Olson, of Anarchy Evolution. He has received the Bryan Patterson Prize, among other honors.
A veteran voice artist, Tom Zingarelli has produced and narrated many audiobooks in the last several years. He has also recorded books for the Connecticut State Library for the Blind and Physically Handicapped. His voice was featured on the popular PBS children's television program Between the Lions.