A world map displays the number of space missions per country, with circle size scaled by mission count using a square-root scale. A time-series histogram at the bottom shows missions per month, and users can brush a date range to filter the map’s circles. Built with D3 v5 and React, the visualization uses `geoNaturalEarth1` and `geoPath` for the map projection, `brushX` for the brushing interaction, and `scaleSqrt` for sizing. Mission data is sourced from Kaggle, and country boundaries come from the World Atlas TopoJSON.