The Browser Wars - Visualized as Tree Rings
I applaud the authors for attempting a new kind of data visualization. However, I find two major flaws in the graph:1) Because the perimeter of a circle grows as a function of the radius, an arc must grow just to represent the same share. This is misleading, giving an impression of growth where there is none.2) It is difficult to tell which arcs on one side of the circle go with arcs on other parts of the circle. There is simply too much distance between them to judge accurately which arcs belong to the same time period.