" If a failure to preserve and consider potentially controversial evidence has frustrated a full understanding of the Hypogeum, then the same is also true for the megalithic temples and even the prehistoric cave sites in Malta. Thus, Mifsud points out that archaeologists excavating Ghar Dalam cave in the early twentieth century [...] 'discovered several knives, scrapers, borers and burins in previously undisturbed deposits, and although stratigraphically Pleistocene, they have been arbitrarily attributed to the Neolithic'. "

― Graham Hancock , Underworld: The Mysterious Origins of Civilization