Shrunken head heads of monkeys or sloths. Some even used goatskin. Kate Duncan wrote in 2001 that "It has been estimated that about 80 percent of the tsantsas in private and museum hands are fraudulent," including almost all that are female or which include an entire torso rather than just a head. Thor Heyerdahl recounts in "Kon-Tiki" (1947) the various problems of getting into the Jívaro (Shuar) area in Ecuador to get balsa wood for his expedition raft. Local people would not guide his team into the jungle for fear of being killed and having their heads shrunk. In 1951 and 1952
Frogner century Scandinavian sea vessels - including the fully intact Oseberg ship - which were used as high status tombs. A collection of Viking weapons, utensils and talismans, buried with the ships, is also on display. The Kon-Tiki Museum is named after the raft on which Norwegian adventurer Thor Heyerdahl crossed the Pacific Ocean in 1947. Alongside the raft, the museum houses various artefacts related to Heyerdahl's other expeditions and a changing program of temporary exhibitions explores his life and work. Oslo City Museum is situated at Frogner Manor in the Vigeland park (Frognerparken). It is a museum of cultural history