Seminar – February 5, 2026 – Origin and preservation of organic compounds in the Martian subsurface: what clays have to tell us. Gallery Seminar – February 5, 2026 – Origin and preservation of organic compounds in the Martian subsurface: what clays have to tell us. Seminars Seminar – February 5, 2026 – Origin and preservation of organic compounds in the Martian subsurface: what clays have to tell us.