Documentary. Title from container. Originally produced as three episodes of the television series: Nova. TV Parental Guidelines rating: TV-G (general audience; most parents would find this program suitable for all ages). Cinematography, Piers Leigh ; editor, Jedd Ehrmann, music, Tay Chee Wei, Doug Brody. Narrator: Jay O. Sanders. In English with optional English subtitles for the deaf and hard of hearing (SDH).