This example displays a world map using the Natural Earth projection, with country boundaries rendered as filled paths on an SVG canvas. It demonstrates fundamental D3.js DOM manipulation by loading geographic data from a remote TopoJSON file, converting it to GeoJSON with the `feature` function, and projecting it using `d3.geoPath` and `geoNaturalEarth1`. The sphere outline and countries are styled via CSS, with sky-blue fills and thin stroke outlines. The visualization relies on D3 v5 and TopoJSON v3 to generate the map.