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Jennifer Tadge, an ethnologist at the Nature and Human State Museum, with the exhibit 'Over-Modulated Ceremonial Skull from Papua New Guinea' in Oldenburg, Germany, 2 May 2017. The item is part of the museum's collection of skulls from the extra-European world. The museum is currently conducting research on the items in a bid to determine the provenance of the skulls and the nature of the collectors' interest in them. Photo: Ingo Wagner/dpa /MediaPunch ***FOR USA ONLY***