© 2020. Published under the PNAS license.Wierzchos, J.Artieda, O.Ascaso, C.Nieto García, F.Vítek, P.Azua Bustos, A.Fairén, Alberto G.Unidad de Excelencia Científica María de Maeztu Centro de Astrobiología del Instituto Nacional de Técnica Aeroespacial y CSIC, MDM-2017-07372021-04-132021-04-132020-10-22Proceedings of the National Academy of Sciences of the United States of America (PNAS)https://www.pnas.org/content/early/2020/10/20/2013134117http://hdl.handle.net/20.500.12666/308engAttribution-NonCommercial-NoDerivatives 4.0 Internationalhttps://creativecommons.org/licenses/by-nc-nd/4.0/Crystalline water in gypsum is unavailable for cyanobacteria in laboratory experiments and in natural desert endolithic habitatsinfo:eu-repo/semantics/article10.1073/pnas.20131341171091-6490info:eu-repo/semantics/openAccess