NASA postdoc Eva Stueeken (The Selenium Isotope Perspective on Biogeochemical Events in Deep Time) and NSF GRFP supported graduate student Michael Kipp (Selenium Isotopes as a Proxy for Deep-Ocean Redox State during the Paleoproterozoic Lomagundi Event), both VPL members, gave oral presentations at the leading international geochemical conference – the Goldschmidt Conference – in Yokohama, Japan.