Where to start with this. In the developer's own words: ‘The main goal of this project is to expose human knowledge in a visual and structured way to accelerate learning'. The result is a kind of meta-mind map of research pathways across the internet. If it hardly scratches the surface of some areas, it offers a start at least, and where the internet is concerned that is always more than it seems. Moreover, this is an open source, living project with different implementations. The title link will take you to the version hosted by Mindnode, but the Github project is well worth exploring.