 There were several types of shamans distinguishing ones contacting upper world, ones contacting underneath world, ones contacting the dead.The isolated location of Nganasan people enabled that shamanism was a living phenomenon among them even in the beginning of the 20th century, the last notable Nganasan shaman's seances could be recorded on film in the 1970s.One of the occasions in which the shaman partook was the "clean tent rite", held after the polar night, which included sacrifices.