A gigantic study of schoolchildren in France pinpoints the moment a ‘mathematical gender gap’ appears during school. Plus, a mysterious epidemic of kidney disease affecting young men and a deep-sea squid species caught on camera for the first time.

Nature, Published online: 11 June 2025; doi:10.1038/d41586-025-01856-9

A gigantic study of schoolchildren in France pinpoints the moment a ‘mathematical gender gap’ appears during school. Plus, a mysterious epidemic of kidney disease affecting young men and a deep-sea squid species caught on camera for the first time.

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