FIGURE 2.

Flow diagram of the BioRock experiment. Three bacterial species were prepared for the experiment: S. desiccabilis (red squares), B. subtilis (green squares), and C. metallidurans (blue squares). Negative controls (gray squares) represented sterile basalt slides. After integration in the experimental units (EUs), the EUs were either launched to the ISS (blue oval), where they were installed in KUBIK incubators and subjected to microgravity (μg), simulated Mars gravity (Mars g) or simulated Earth gravity (Flight-1g), or kept for incubation on Earth for the ground gravity control (True-1g, yellow oval). Steps in green were part of the experimental time period (21 days). Storage passages were omitted for brevity. Each experimental set was represented in triplicate.