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Item Dubiofossils from a Mars-analogue subsurface palaeoenvironment : the limits of biogenicity criteria(2021-09-01) McMahon, Sean; Ivarsson, Magnus; Wacey, David; Saunders, Martin; Muirhead, David; Belivanova, Veneta; Knoll, Pamela; Steinbock, Oliver; Frost, Daniel A.; University of Aberdeen.Geology and GeophysicsItem Demonstrating deep biosphere activity in the geological record of lake sediments, on Earth and Mars(2018-10) Parnell, John; McMahon, Sean; Boyce, Adrian; University of Aberdeen.Environment and Food Security; University of Aberdeen.Energy; University of Aberdeen.Geology and GeophysicsItem Evidence for Seismogenic Hydrogen Gas, a Potential Microbial Energy Source on Earth and Mars(2016-09-01) McMahon, Sean; Parnell, John; Blamey, Nigel J F; University of Aberdeen.Geology and Geophysics; University of Aberdeen.Environment and Food Security; University of Aberdeen.EnergyItem Sampling methane in basalt on Earth and Mars(2013-04) McMahon, Sean; Parnell, John; Blamey, Nigel J F; University of Aberdeen.Geology and Geophysics; University of Aberdeen.Environment and Food Security; University of Aberdeen.Energy