Experiment 01 · Data Visualization
Global Demographics Atlas: 100 Years of Births, Deaths and Ageing
See how 236 countries and areas have aged from 1926 to 2026. Drag any country into the circle to see its population, deaths and births by age, then compare up to five countries across a century.
What you can explore
One circle, one century, every country
The age profile
Population, deaths and births by 5-year age group for the country in the centre, men and women side by side.
15+ map layers
Colour the world by age, children per woman, life expectancy, income, inequality, religion, homicides and healthcare.
Compare over time
Lock up to five countries and follow them from 1926 to 2026. See what goes with what across 195 countries.
- countries and areas
- 236
- years, 1926–2026
- 101
- country-years of data
- 23,836
- a just-for-fun fiction mode
- Realms ✦
The AI use case
How we built it with AI, step by step
From a question to a live app: AI-assisted engineering with every number traceable to an official source.
Data spec
We defined the questions, measures and age groups with AI, then reviewed them against the UN definitions.
Reproducible pipeline
Raw files come from the official UN WPP 2024 package, World Bank and Gapminder, each pinned to a version and checksum.
Interactive app
A fast D3 app with accessible controls, data tables for every chart and honest labels for estimates and projections.
Kept current
The pipeline checks for a new UN edition twice a year, so the atlas updates without a rebuild by hand.
Sources and licences
United Nations, DESA, Population Division (2024). World Population Prospects 2024, CC BY 3.0 IGO. Estimates 1950–2023, projections 2024–2026.
GDP, income, Gini, income levels and religion: Gapminder, CC BY. Healthcare and homicide: World Bank World Development Indicators, CC BY 4.0.
1926–1949 is our own reconstruction: off by default and always marked.
Map: Natural Earth (public domain). Today's borders throughout; no position on disputed territories.
Your Next Step
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