This visualization shows the global distribution of Nobel Prize winners by country, using prize counts derived from laureate birth or organization countries. A choropleth world map colors each nation on a blue sequential scale, with gray for countries lacking winners and a tooltip providing details. The implementation uses D3 v7 with `d3.geoNaturalEarth1` and `d3.geoPath` to render SVG paths from world GeoJSON data, while `d3.rollup` and a custom normalization function reconcile country names between the CSV dataset and map features.