How has the discovery of Iceman contributed to our understanding of Neolithic Italy/Austria?

On September 19, 1991, a couple from Nuremberg mountaineering in the Otztal Alps discovered the upper part of a corpse protruding from the glacier. It was to be later discovered that this body was actually that of a 5200-year-old man from the Stone Age. Not realizing the age of their discovery, rescue workers who came to the scene treated the body less than gently as they tried to pull it from the ice. A jackhammer tore chunks …

…disabling cut in his right hand, why was he clutching his dagger in it? Many of these answers may rely on evidence that may never be found. For example, we don't know how the backpack was worn, over the head or over the shoulder, and the quiver has no strap to indicate how it was carried. Nevertheless, the study of the artefacts that did survive the extraction have changed our understanding of the Neolithic world.