Consequently, "Davy Crockett" and other pioneers of the Old West, and American history in general, appeared in "Frontier Land". Similarly, "20,000 Leagues Under the Sea" might be the focus of an evening spent in "Adventure Land", although a documentary on the film could also be possibly presented as a topic for such episodes, including clips from the actual film. Topics for "Fantasy Land" would include either actual cartoons, and animated films, or documentaries on "The Making of ..." (such as behind-the-scenes presentation of Peggy Lee singing the duet of the wicked Siamese cats in "Lady and the Tramp", or the barbershop quartet of lost dogs in the municipal Dog Pound); excerpts from a "True-Life Adventure" documentary may also be included (for example, one on the life and works of beavers and their dam-building) or those using stroboscopic stop-action photography (such as investigating what really happened when a rain-drop fell in a puddle, as part of a "Fantasy Land" episode), explaining the techniques of cartoon animation. The multiplane camera used to create the three-dimensional effects of "Bambi" was also as a topic for a "Fantasy Land"-set telecast. In one episode, four different artists were given the task of drawing the same tree, with each artist using his own preferred ways of drawing and imagining a tree; this led to cartoon examples of differently animated trees, as in some of the early "Silly Symphonies" shorts, and later full-length animated films. "Tomorrow Land" was an opportunity for the Disney studio staff to present cutting-edge science and technology, and to predict possible futures, such as futuristic automobiles and highways, and featured Wernher von Braun as an on-air technical consultant in Man and the Moon, which aired December 28, 1955. This format remained basically unchanged through the 1980s, though new material was scarce in later years. Other episodes were segments from Disney films such as "Seal Island" and "Alice in Wonderland", or cartoons of Donald Duck and other Disney standbys.