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Volume 42

About the cover: The cover shows a false colour image of amorphous calcium carbonate (ACC) experimentally precipitated from seawater. Each ball of ACC is approximately 50-100nm in diameter. In Letter 2623, Foster and Evans present a biomineralisation model that includes an ACC component and use this to place constraints on the calcification process of corals.

Image credit: The false colour image was created by Gavin Foster and David Evans using a field emission gun scanning electron microscope, with the project funded by the University of Southampton, UKRI, the Royal Society, and Horizon Europe.