This visualization shows global population estimates for 2018 using a natural Earth projection, with circles sized proportionally to population overlaid on country boundaries. It renders in SVG with animation, combining a world map of countries from World Atlas topojson with UN population data. Using d3.geoNaturalEarth1, d3.geoPath, and d3.geoCentroid, it projects each country and draws scaled circles via d3.scaleSqrt, plus a size legend and zoom interaction via d3.zoom.