Pure water freezes only at around -38°C (-36°F). Tiny mineral dust particles act as so-called ice nucleators—crystallization seeds on which ice crystals form. A research team at Bielefeld University and the University of Vienna, in cooperation with researchers at the University of Helsinki, has...
Source: [Phys.org](https://phys.org/news/2026-08-microcline-reveals-common-mineral-surface.html)