演员：Frank,Drake,Carolyn,Porco,John,Casani,Lawrence,Krauss,Timothy,Ferris,Edward,Stone,Nick,Sagan,Larry,Soderblom,Charley,Kohlhase,Fran,Bagenal,James,F.,Bell,Frank,Locatell,Suzanne,Dodd,Jon,Lomberg,Heidi,Hammel