Extended Data Fig. 3: Surface and vertical distribution of a putative hydrogenotrophic methanogenic biosphere on Noachian Mars.
From: Early Mars habitability and global cooling by H2-based methanogens
Spatial projection of the median minimum depth of this biomass occurrence for three values of brines’ freezing point of 203 K (A), 252 K (B), and 273 K (C). The white shaded areas correspond to the probability (from 50% to 90% by steps of 10%) of ice-coverage superimposed to the maps by transparency. Open circles indicate the Noachian lakes distributed along the South-North dichotomy. See Methods for more detail.
