Olga Pravdivtseva, front right, a research associate professor of physics in Arts & Sciences, helps adjust the extraction manifold apparatus at Johnson Space Center in Houston. Scientists at Washington University in St. Louis designed and built the device that is being used to collect gases from a container of lunar soil collected by astronauts on the Apollo 17 mission. Also pictured is NASA's Juliane Gross, Astromaterials Research and Exploration Science Division (ARES) deputy Apollo curator.