Dr. Kevin Bohacs is a senior research scientist with ExxonMobil Upstream Research Company. His work integrates many scales of field and laboratory investigation, from plate tectonics to molecular geochemistry, to quantitative reconstructions of climate, oceanography, tectonics, and ecosystems of ancient depositional systems ranging from deep ocean to swamps and lakes. Dr. Bohacs will be giving a talk entitled "The path to Gale Crater—the role of terrestrial field work in selecting a landing site on Mars."