other interpretations, including capital punishment, human sacrifice, assassination or systemic warfare cannot be ruled out. While some skeletal and artefactual evidence is suggestive of violent death, clear evidence showing consistent intergroup violence (rather than accidents, homicide etc) is relatively absent. The site of the Jebel Sahaba, estimated to be 13,000 years old, in Sudan contains evidence of a mass grave with wound marks on 24 out of 59 skeletons, although it is an outlier with no other similar sites discovered. It has also been suggested that lack of evidence of Paleolithic warfare is due to differences in archaeology resulting in less evidence being likely to survive to be analysed compared to other eras. Since Paleolithic humans lived in small, mobile bands, with low population densities and less durable structures, while also existing further back in history, this results in a lower probability of finding clear evidence as well as that evidence not decaying by the modern day. Epipaleolithic The most ancient archaeological record of what could have been a prehistoric massacre is at the site of Jebel Sahaba, committed against a population associated with the Qadan culture of far northern Sudan. The cemetery contains a large number of skeletons that are approximately 13,000 to 14,000 years old, almost half of them with arrowheads embedded in their skeletons, which indicates that they may have been the casualties of warfare. It has been noted that the violence, if dated correctly, likely occurred in the wake of a local ecological crisis. At the site of Nataruk in Turkana, Kenya, numerous 10,000-year-old human remains were found with possible evidence of major traumatic injuries, including obsidian bladelets embedded in the skeletons, that should have been lethal. According to the original study, published in January 2016, the region was a "fertile lakeshore landscape sustaining a substantial population of hunter-gatherers" where pottery had been found, suggesting storage of food and sedentism. The initial report concluded that the bodies at Nataruk were not interred, but were preserved in the positions the individuals had died at the edge of a lagoon. However, evidence of blunt-force cranial trauma and lack of interment have been called into question, casting doubt upon the assertion that the site represents early intragroup violence. The oldest rock art depicting acts of violence between hunter-gatherers in Northern Australia has been tentatively dated to 10,000 years ago. The earliest, limited evidence for war in Mesolithic Europe likewise