This example shows an interactive world map built with D3.js v5, displaying countries as green SVG paths with black borders that turn red on hover. The map uses a natural Earth projection via `d3.geoNaturalEarth1` and `d3.geoPath`, with country boundaries loaded from a TopoJSON file (world-atlas 50m) and country names from a matching TSV file. Zooming is enabled through d3.zoom, which applies a transform to the map group. The sphere background is rendered as a blue path, and each country includes a tooltip title showing its name.