Comedian Chris Rock recently appeared on Oprah to talk about his participation in the upcoming PBS show African American Lives 2. African American Lives is the brainchild of Harvard Professor Henry Louis "Skip" Gates. Using DNA testing and genealogy, Gates helps several prominent African Americans trace their roots. Of the experience, Rock says: After learning about his family history, Chris says he can make sense of certain things. "The things I'm doing with my life, they make sense," he says. "Let's just hope that everybody learns where they come from so their lives can make more sense."