a presentation of the Howard Hughes Medical Institute ; produced by Sutherland Media Productions, Inc ; producer, Dennis WC. Liu, Ann DeStefano Sutherland ; director, Wally Ashby
Oxford University, Victoria University of Wellington, The Science Documentary Project present ; a David Sington/Simon Lamb film ; a DOX production, co-produced by Catherine Fitzgerald ; directed by Simon Lamb & David Sington
a film by Maria Finitzo ; executive producer, Gordon Quinn ; produced in association with The British Broadcasting Corporation, The Canadian Broadcasting Corporation, SBS-TV Australia ; produced by Kartemquin Educational Films, Inc