This example shows an interactive world map rendered with D3.js, displaying country boundaries colored light green that turn red on hover. The visualization uses a natural Earth projection via `d3.geoNaturalEarth1` and `d3.geoPath` to draw geographic features, with zoom support through `d3.zoom`. It loads world-atlas TopoJSON data and a companion TSV file to map country names, appending tooltips with each country’s name. The map is drawn as SVG paths, including a dark blue sphere background.