Postdoctoral associate Christian Miller joined DTM this week. He received his Ph.D. from the MIT/ WHOI Joint Program in Oceanography in 2009. Miller’s research interests focus on the development and application of novel isotope systems to geochemical problems. A significant portion of his Ph.D. research involved the development of stable isotope analysis of Re and the identification of Re isotope variation in nature. At DTM, Miller will work on dating chondrules—some of the oldest materials in the solar system—with several radioactive chronometers. Chondrules have been dated with single decay systems before and have shown million-year variations in age. This is unexpected in light of prevailing models of solar system formation. Using several decay systems on the same chondrule will allow researchers to say with certainty that age variations are real; if they are the result of mixing of materials of different ages; or if they are recording events that occurred after the formation of the chondrule.