Anne quotes a fascinating theory detailing how Inca Khipus (string assemblies originally thought to be used only for calculations) might have been used as a form of 3 dimensionnal writing. It’s great and at the same time very sad to see that old civilizations still have secrets and knowledge that we can delve into. The sad part being that in this case if europeans hadn’t virtually wiped them out we wouldnt have to hypothesize on what they actually used those Khipus for.