Grisly, 4,000-year-old forensic evidence found in a cave in the Pyrenees Mountains hints at a serious disagreement between members of the region’s first shepherds. Archaeologists uncovered the rib and its accompanying arrowhead at the Roc de les Orenetes archaeological site. Located 79 miles north of Barcelona at an altitude of over 5,900 feet, Roc de les Orenetes was first discovered in the late 1960s. Archaeologists have excavated over 6,000 bone fragments from Roc de les Orenetes. According to the team, excavators have located a flint arrowhead identical to the others in Roc de les Orenetes, this time, embedded in a rib fragment.