One very attractive thing about these poster sessions... sharing one's passion. Soil characterization at Meridani. Meteorite (chrondrite) composition. Martian methane production theories, or evolution of ancient crater-lakes. Remote sensing studies of the Dionysius Region on the moon. And literally hundreds of others... one can stop and point and ask the author a question, and most will joyously launch into their favorite topics. :) It resembles 2 gyms-full of an adult-version science fair, only with real labs and spacecraft...