Figure 1
From: Detectability of biosignatures in a low-biomass simulation of martian sediments
Typical micrographs of stained cells in Mars analogue mudrock. Example micrographs of final transfer cultures. Rod-shaped cell structures, distinctive from spherical structure that may or may not be cellular, are marked with white circles. There were high levels of autofluorescing material (red) of different grain sizes in almost all fields of view.
