This interactive scatterplot animates 209 years of global development, tracing each nation’s per-capita income (x-axis), life expectancy (y-axis), and population (circle radius) across time. Clicking and dragging the year slider scrubs forward and backward through the dataset, with circles colored by geographic region. The visualization uses D3 v3’s scales (log, linear, sqrt), axes, and transitions, interpolating sparse historical data from Gapminder via linear interpolation and bisection. Rendered as animated SVG elements, it recreates Hans Rosling’s famous 2006 TED talk visualization.