Louis. He obtained B.S. degrees from University of Illinois at Urbana-Champaign in engineering physics, astronomy, and geology, respectively. He obtained a Master’s of Philosophy in polar studies from Churchill College, Cambridge University in 2002 and a Ph.D. in geochemistry in 2007 from the Massachusetts Institute of Technology. Subsequently, he was as an O.K. Earl postdoctoral fellow at the California Institute of Technology in 2007–2008, before joining the faculty at Washington University in 2009. His current research interests focus on isotope biogeochemistry, particularly understanding the biological, sedimentological, and diagenetic processes that generate and alter isotopic signatures in modern marine sedimentary phases and ultimately how they get preserved in the rock record.