This example displays a world map using the Natural Earth projection, with countries filled in sky blue against a black spherical backdrop. The visualization loads geographic data from the World Atlas TopoJSON dataset via `d3.json`, then converts it to GeoJSON features using `topojson.feature`. The `d3.geoNaturalEarth1` projection and `d3.geoPath` render the countries as SVG paths, while a separate path for the sphere outlines the globe.