There are basically three kinds of knowledge humans can share with one another: news, concepts, and skills. Most of our early advances in communication technology focused on sharing news over a distance – a good place to start, as it was helpful in avoiding death. We've come a long way since then, and while online technologies are still evolving – and while too many people still lack access to them – we're using the internet to convey news, skills, and sophisticated concepts globally, instantaneously, and with increasing efficiency. Let's take a look at a few key historical moments in the history of knowledge transfer.