by Paul Devlin ; directed, edited, and produced by Paul Devlin ; produced by Claire Missanelli ; a Paul Devlin production in association with BBC, YLE/FST Finland, Discovery Channel Canada, SVT/Sweden
writers/directors, Marion Gruner, Christopher Sumpton ; producers, Christopher Sumpton, Robin Benger, Marion Gruner ; produced in association with Arte France, Unité Découverte et Connaissance ; and in association with Canadian Broadcasting Corporation ; Cogent Benger Productions Inc
Arte France, Grand Angle Productions ; directors, Emmanuelle Sapin, Pascal Goblot, written by Emmanuelle Sapin, Pascal Goblot, Guillaume Pérès ; produced by Guillaume Pérès
produced by the Harvard-Smithsonian Center for Astrophysics Science Media Group in association with the Harvard University Department of Physics ; Annenberg Media
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
Arte France, Beta Prod present a film by Alain Tixier ; in association with Off the Fence ; authors, Annette Gourdon, Alain Tixier ; director, Alain Tixier