A production of the Educational Film Center and Christenson Associates ; writers, Louis Barbash, Patrick Prentice ; producer/director, Ira H. Klugerman
[a film by Bregtje van der Haak] ; producer, Judith van den Berg ; director, Bregtje van der Haak ; a co-production of VPRO and International Architecture Biennale Rotterdam
produced & directed by Giles Badger ; a BBC Studios Natural History Unit production ; co-produced with BBC America, Tencent Penguin Pictures, ZDF, France Télévisions and China Media Group CCTV9