Africa's Elephant Kingdom; Discovery Channel Pictures/Imax Corporation Michael Caulfield directed this 40-minute Imax documentary about African elephants, traveling over Mount Kilimanjaro, and Kenyan waterfalls, rivers, and forests. A large 60-year-old elephant known as Old Bull (voice of Avery Brooks) recalls the history of his clan and relationships in elephant society -- babies to mothers, mothers to families, and families to clans.