This visualization shows a phylogenetic-style tree diagram for cat species, tracing evolutionary branches from a central root (Dinohippus) through families like Felinae and Panthera down to individual species such as Cheetah, Cougar, and Andean Cat. The code uses `d3.hierarchy` and `d3.tree` to compute the layout, with SVG rendered paths styled via the `level` and `type` data properties. Node circles use a static radius of 9 from the value field, and text labels are positioned relative to each node’s data values.