The new approach turns a single nodule into a high-resolution climate archive that can track daily temperature swings as well as warming trends. Combining three-dimensional X-ray imaging with geochemical analyses and a special algorithm, the team reconstructed daily seawater temperatures from a single rhodolith collected in the central Red Sea. Validation in the Red SeaThe researchers applied their method in the Red Sea, an extremely salty, nutrient-poor basin with high evaporation and intense sunlight. Rhodoliths can act as daily resolution paleotemperature archives in the Red Sea. https://doi.org/10.1038/s43247-026-03603-yWeitere Informationen:https://www.mpic.de/6070439/taegliche-meerestemperaturen-aus-rotalgen-ablesenBilder<Lena Li, first author of the study, holds a rhodolith sample collected in the Red Sea.