NOVA, Season 49, Episode 9, Ice Age Footprints
directed by Bella Falk, fl. 2007 and David Dugan, fl. 1988; presented by Kirk Johnson, fl. 1996; produced by Bella Falk, fl. 2007, Windfall Films and WGBH Educational Foundation, in NOVA, Season 49, Episode 9 (Arlington, VA: Public Broadcasting Service, 2022), 53 mins
