McMaster, Joseph, screenwriter.

Hornsby, Gaby, television producer.

Lewman, Lance, narrator.

British Broadcasting Corporation, production company.

WGBH (Television station : Boston, Mass.). Science Unit, production company.

PBS Distribution (Firm) film distributor.

written by Joseph McMaster ; produced and directed for BBC by Gaby Hornsby ; produced for Nova by the Nova Science Unit for WGBH Boston.

Macaulay, David.

Hallet, Judith Dwan, 1941-

Vink, Eugenie.

McMaster, Joseph.

Levenson, Thomas.

Olshaker, Mark, 1951-

Klein, Larry.

Apsell, Paula S.

WGBH Video (Firm)

WGBH Educational Foundation.

WGBH (Television station : Boston, Mass.)

with David Macaulay ; managing director Alan Ritsko ; executive-in-charge Paula S. Apsell ; executive producer Larry Klein.

Greene, Brian, 1963-

McMaster, Joseph.

Sahula, Jonathan.

Cort, Julia.

Bartlett, Dick, 1942-

Judd, Graham.

Streeter, Sabin.

Audette, Steve.

MacLowry, Randall.

Rosen, Josh.

DeNooyer, Rushmore.

Elisco, David

Quade, Doug.

Strachan, Anna Lee.

Greene, Brian, 1963- Elegant universe.

Greene, Brian, 1963- Fabric of the cosmos.

PBS Distribution (Firm)

WGBH (Television station : Boston, Mass.)

Channel Four (Great Britain)

David Hickman Films (Firm)

Sveriges television.

Norddeutscher Rundfunk.

WGBH Educational Foundation.

ARTE France.

National Geographic Channel (Television station : Washington, D.C.)

Sahula, Jonathan, television producer.

McMaster, Joseph, television producer, screenwriter.

Wallace, Melanie (Producer)

Swartz, Howard B., television producer.

Aspell, Paula S., television producer.

Judd, Graham, television producer, television director, screenwriter.

Streeter, Sabin, television producer, television director, screenwriter.

MacLowry, Randall, television producer, television director, screenwriter.

Cort, Julia, television producer, television director, screenwriter.

Rosen, Josh, television producer, television director, screenwriter.

DeNooyer, Rushmore, television producer, television director, screenwriter.

Elisco, David screenwriter.

Quade, Doug, television producer, film editor.

Strachan, Anna Lee, television producer.

Greene, Brian, 1963- host.

Audette, Steve, film editor.

Humphreys, Robert, director of photography.

McCarthy, Stephen (Cinematographer)

Tomney, Ed, composer (expression)

Greene, Brian, 1963- Fabric of the cosmos.

32-12 Media (Firm), production company.

Film Posse (Firm), production company.

Spine Films, production company.

Lone Wolf Documentary Group, production company.

ARTE France production company.

National Geographic Channel (Television station : Washington, D.C.), production company.

WGBH Educational Foundation, production company.

PBS Home Video film distributor.

produced and directed by Graham Judd and Sabin Streeter ; telescript by Graham Judd & Sabin Streeter ; story by Joseph McMaster and Graham Judd & Sabin Streeter produced and directed by Randall MacLowry ; telescript by Randall MacLowry ; story by Joseph McMaster and Randall MacLowry produced and directed by Julia Cort and Josh Rosen ; telescript by Julia Cort and Josh Rosen ; story by Joseph McMaster and Josh Rosen (ca. 55 min.) -- produced and directed by Rushmore DeNooyer ; telescript by Rushmore DeNooyer ; story by Joseph McMaster and David Elisco and Rushmore DeNooyer ; produced by Doug Quade ; produced by Anna Lee Strachan (ca. 56 min.)

senior producer, Jonathan Shula ; series executive producer, Joseph McMaster ; senior series producer, Melanie Wallace ; executive producer, Howard Swartz ; senior executive producer, Paula S. Apsell ; a NOVA Production by 32-12 Media (program 1), Film Posse (program 2), Spine Films (program 3), Lone Wolf Documentary Group (program 4) ; in association with ARTE France and National Geographic Channel ; WGBH Educational Foundation.