While NASA astronaut Stephanie Wilson has created a small trench to analyze with a portable spectrometer some levels of now-buried rock deposits, ESA astronaut Alexander Gerst looks for more clues for the science team.

Credits: ESA / A. Romeo Larger image

Astrobiology, Away Team, Tricorder,

Explorers Club Fellow, ex-NASA Space Station Payload manager/space biologist, Away Teams, Journalist, Lapsed climber, Synaesthete, Na’Vi-Jedi-Freman-Buddhist-mix, ASL, Devon Island and Everest Base Camp...