12.335 Experimental Atmospheric Chemistry

12.104 Introduction to Geochemistry

12.490 Current Topics in Stable Isotope Geochemistry

12.092 and 12.490 Stable Isotope Geochemistry and Biogeochemical Cycles

12.490 and 12.092, Current topics in Astrobiology and Geobiology

12.491, Biogeochemistry of Sulfur