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Nature Geoscience, Published online: 30 July 2026; doi:10.1038/s41561-026-02040-y

Co-occurring atmospheric and river heatwaves have tripled since the 1980s across the USA and Europe, and are projected to become the norm by 2100, according to model simulations.

Nature, Published online: 29 July 2026; doi:10.1038/s41586-026-10814-y

In Drosophila, cell fate switching in adult intestinal stem cells is determined through an epigenetic mechanism in which these cells count divisions, switching from producing enterocytes to producing an enteroendocrine mother cell every ninth division.