McMahon, SeanHood, Ashleigh v. S.Parnell, JohnBowden, Stephen2018-10-292018-10-292018-10-29McMahon, S, Hood, A V S, Parnell, J & Bowden, S 2018, 'Reduction spheroids preserve a uranium isotope record of the ancient deep continental biosphere', Nature Communications, vol. 9, 4505. https://doi.org/10.1038/s41467-018-06974-92041-1723http://hdl.handle.net/2164/11334S.M. acknowledges the support of the NASA Astrobiology Institute grant NNA13AA90A, Foundations of Complex Life, Evolution, Preservation and Detection on Earth and Beyond, and the European Union’s Horizon 2020 Research and Innovation Programme under Marie Skłodowska-Curie grant agreement 747877. Av.S.H. was supported by a NASA Astrobiology Institute Postdoctoral Fellowship and acknowledges the support of Xiangli Wang and Devon Cole for lab assistance. S.M. and Av.S.H. thank Noah Planavsky for technical advice, lab support, and comments on an early draft. J.P. was supported by NERC under grant number NE/L001764/1. The isotope facility at SUERC is supported by NERC. The authors thank the two anonymous referees for constructive criticisms that improved the manuscript.6819034engastrobiologyelement cyclesenvironmental microbiologypalaeontologyQE GeologyNatural Environment Research Council (NERC)NE/L001764/1QEJournal article10.1038/s41467-018-06974-99