This example displays a world map using a natural Earth projection, rendered as yellow landmasses with black borders on a light blue sphere. It loads world country boundaries from the World Atlas TopoJSON data and converts it to GeoJSON using the `feature` function from TopoJSON. The map is drawn with D3’s `geoNaturalEarth1` projection and `geoPath` generator, appending SVG paths for both the background sphere and individual countries, styled via CSS classes.