The quest to find organic compounds on Mars has significantly advanced over the last ten years, with the identification of basic aromatic compounds, S-heterocycles, and aliphatic organic substances in the Gale crater. The in situ identification of more than 20 organic compounds from clay-containing sandstones found in the approximately 3.5-billion-year-old Knockfarrill Hill member of Glen Torridon, located within Gale crater.