The graph shows this blog posts relationship in term of similarity. Each node in the graph is a post, two nodes are connected by an edge if they share some degree of similarity (weighted by edge thickness and edge distance). A large edge thickness and/or short edge distance shows a strong similarity between the two connected nodes.
Nodes are arranged by force which is modelled by content similarity. The more similar the nodes content, the stronger the force between them. Therefore, nodes that share similar topic will tend to group themself together in a cluster.
Navigate the blog by hovering the mouse on a node and following the node relationship (edges) to find your interesting topic.