Main: view of the Els Trocs cave entrance in the Spanish Pyrenees located on the southern slope of a karst hill on the high plateau of Selvaplana; seen from the pass of the Puerto de las Aras. Source: H. Arcusa Magallón / Scientific Reports. Inset: Images of part of the skeletons damaged by blunt objects/arrows during the massacre. Source: T. Schuerch / G. Schulz / Scientific Reports
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