A new visual by World Visualized highlights the countries with the highest average testosterone levels, measured in nanograms per deciliter (ng/dl).

Across much of the world, people are having fewer children than ever before. A new visual from World Visualised, using World Bank data, shows a striking pattern: between 2000 and 2023, fertility rates in the ten largest countries have fallen sharply, and in five of them, they’ve dropped below the replacement level of 2.1 births per woman.