In the process of doing ‘research’ (well, googling) for my blog about innovations, elites, and flying cars, I stumbled on this wonderful project jointly produced by Gregory Benford and Popular Mechanics: The Future That Never Was: Pictures from the Past. Gregory Benford is

Last week I was in Berlin where I gave a talk in the conference on Contextualising Technical Innovations in Prehistory. The declared focus of the conference was on the evolution of technology in the 4th and 3rd millennia BC, but many of the presentations ranged much more widely, and a