a BBC Studios Natural History Unit production ; a co-production with BBC America, Tencent, WDR, France Televisions and CCTV9 ; a BBC Open University partnership ; executive producer, James Honeyborne ; series producer, Mark Brownlow ; producers, Miles Barton, Orla Doherty, Kathryn Jeffs, Will Ridgeon, John Ruthven, Jonathan Smith
A presentation of Films for the Humanities & Sciences ; Imago Film in co-production with RTSI-SF Swiss Television presents ; SF Swiss Television ; Suissimage ; producer, Villi Hermann ; screenplay by Eve Martin and Villi Hermann