a film by Florentine Films/Hott Productions, Inc. in association with the Clark Science Center and Smith College ; produced by Lawrence R. Hott, Tom Litwin, Diane Garey ; directed by Lawrence R. Hott ; written by Ken Chowder, Diane Garey
a Tigress production in association with Devillier Donegan Enterprises & PBS ; writers, Anne MacLeod, James Sasse ; executive producer, Jeremy Bradshaw
Hydro-Québec presents a TVA International production, in association with the Swedish Museum of Natural History and Imagica Corporation ; writers, Georges-Hébert Germain, David Homel ; producer, Martin J. Dignard ; directors, Martin J. Dignard, William Reeve
directed by Gernot Lercher ; narrated by James Lurie ; produced by Yvette Durrenberger, Elisabeth Faber, Gabriele Wistawel, Heike Lettau, Thirteen Productions
BBC Earth, Reliance Entertainment and IM Global Present ; a BBC Earth production ; directed by Mike Slee, Patrick Morris, Neil Nightingale ; produced by Myles Connolly, Neil Nightingale, Amanda Hill
Bullfrog Films presents ; a film by Florentine Films/Hott Productions, Inc. in association with the Clark Science Center at Smith College ; produced by Lawrence R. Hott, Tom Litwin, Diane Garey ; directed by Lawrence R. Hott ; written by Ken Chowder, Diane Garey
a production of Partisan Pictures and Thirteen in association with WNET.org and National Geographic Channel ; written and produced by Doug Shultz ; series producer for Nature, Bill Murphy ; executive producer for Nature, Fred Kaufman