By examining 200 years of demographic data from 237 countries and territories, Kenji Itao, of the RIKEN Center for Brain Science in Japan, discovered that universal mathematical laws describe how fertility declines as societies develop, providing a new framework for understanding one of the most ...

Source: [Phys.org](https://phys.org/news/2026-07-universal-patterns-global-fertility-decline.html)

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