A production of Clearwater Documentary Inc. ; produced in association with Canadian Broadcasting Corporation ; The Nature of Things ; Directed and written by Tom Radford, Niobe Thompson ; produced by Niobe Thompson
director, Jacqueline Corkery ; producer, Tina Verma ; produced by Canadian Broadcasting Corporation, in association with National Geographic Channel, and with the participation of Discovery Science
director, Elise Swerhone ; written by Robert Lower ; producers, Merit Jensen Carr, Sandra Moore ; a Merit Motion Pictures production ; produced in association with Canadian Broadcasting Corporation ; produced in association with National Geographic Channel, and with the participation of Discovery Science
Bullfrog Films presents ; directed and produced by Sara Marino ; written by Fiona McHugh ; co-produced by Helen Lerberg ; produced by Canadian Broadcasting Corporation
written & directed by Erna Buffie ; producers, Merit Jensen Carr, Sandra Moore ; a Merit Motion Pictures production ; produced in association with Canadian Broadcasting Corporation ; produced in association with National Geographic Channel, and with the participation of Discovery Science
Bullfrog Films presents ; directed by David Springbett ; producers, David Springbett, Heather MacAndrew ; writer, Heather MacAndrew ; produced by Asterisk Productions ; produced in association with the Canadian Broadcasting Corporation