Ötzi the Iceman: What we know 30 years after his discovery
nationalgeographic.com
nationalgeographic.com
One of the links in the article which I also found of interest was the museum page for the Iceman's equipment: http://www.iceman.it/en/equipment/
Among the items found was a tool used to resharpen flint (the equipment link includes a picture as well):
> Researchers were initially puzzled by an object in Ötzi’s equipment – a 12-cm-long tool made from the stripped branch of a lime tree and sharpened like a pencil. A black “lead” protrudes from the sharpened end. This was identified as a fragment from a fire-hardened antler that was hammered into the core of the branch. Archaeologic experiments have shown that this tool was used to shape (“retouch”) flint tools. First a lump of flint was hammered into the desired shape then the retoucheur was used for the precision work of fashioning a sharp blade. It was also used to re-sharpen tools and weapons. The antler point was sharpened like a pencil when it became blunt. This tool was completely unknown before Ötzi was found and has given archaeologists an entirely new understanding of the Copper Age tools and methods.