" Soon after the news broke about these published conclusions [regarding the evidence of a Palaeolithic human presence on Malta] and their stark contradiction of the orthodox view on Malta's prehistory, the Italian team distanced itself from its initial Palaeolithic leanings and claimed instead that the depictions in Ghar Hasan are 'out of context' -- which indeed they are if one is only prepared to countenance a Neolithic context for the earliest human presence in Malta.
Another development at about the same time was that the Ghar Hasan cave began to be vandalized, and the paintings defaced or completely removed, a process that continued over a long period. The result, which would have caused an international furore anywhere else but Malta, is that today:
'The only depictions which have survived, unless more are obscured by stalagmitic material on the cavern walls, are the two handprints in red pigment in Gallery D ... Vandalism not of the popular type has destroyed and obscured the entire repertoire of images on the accessible areas. "

― Graham Hancock , Underworld: The Mysterious Origins of Civilization