Hummmm... using the "But we can identify ancient Neanderthal presence through the distinctive Mousterian stone tools that they left behind, which have been found on the coastal Greek islands..."
What if a stone tool or two was picked up at an ancient campsite by a coastal trader seeking ballast in 800 BC and moved as ship's ballast to be off loaded on an offshore island and this same event occurred again in 200 AD moving one of these stone tools to yet another isle would the existance of two stones on different islands prove a migration pattern???
Jas. Hook