Documentary. Originally broadcast as an episode of Nature on the PBS Network in 2022. Program content: ©2022. Wide screen (16x9). Title from disc surface. TV Parental Guidelines rating: TV-G (general audience; most parents would find this program suitable for all ages). Editor, Jim Isler ; cinematography, Mark Carroll, Sandesh Kadur, Russell Kaye, Tim Laman, Garth McElroy, Ann Johnson Prum ; music, Lenny Williams, Chris Biondo. Narrator, Paul Giamatti. English audio; English subtitles for the deaf and hard-for-hearing (SDH); audio-described for the visually impaired in English.