produced by NHNZ in association with PBS, ARTE France, CCTV9, Discovery Networks Europe, ZDF, ZDF Enterprises and NHK ; producers, John Cullum, Hayes Baxley, and Quinn Berentson ; writers, Craig Meade, John Cullum, Andrew Murray, Mark Everton, and Gary Parker
produced by NHNZ in association with PBS, ARTE France, CCTV9, Discovery Networks Europe, ZDF, ZDF Enterprises and NHK ; producers, John Cullum, Hayes Baxley, and Quinn Berentson ; writers, Craig Meade, John Cullum, Andrew Murray, Mark Everton, and Gary Parker
produced by NHNZ in association with PBS, ARTE France, CCTV9, Discovery Networks Europe, ZDF, ZDF Enterprises and NHK ; producers, John Cullum, Hayes Baxley, and Quinn Berentson ; writers, Craig Meade, John Cullum, Andrew Murray, Mark Everton, and Gary Parker
produced by NHNZ in association with PBS, ARTE France, CCTV9, Discovery Networks Europe, ZDF, ZDF Enterprises and NHK ; producers, John Cullum, Hayes Baxley, and Quinn Berentson ; writers, Craig Meade, John Cullum, Andrew Murray, Mark Everton, and Gary Parker
produced by NHNZ in association with PBS, ARTE France, CCTV9, Discovery Networks Europe, ZDF, ZDF Enterprises and NHK ; producers, John Cullum, Hayes Baxley, and Quinn Berentson ; writers, Craig Meade, John Cullum, Andrew Murray, Mark Everton, and Gary Parker
directed by Harald Pokieser ; narrated by Natalia Reyes ; produced by Austrian Broadcasting Corporation Radio & Television (ORF), Cosmos Factory, NDR Naturfilm, Public Broadcasting Service, ARTE, DocLights