The Glass research group studies the microbes that made Earth habitable, and, more specifically, the microbial mechanisms underpinning cryptic transformations of methane and nitrous oxide in oxygen-free ecosystems. Why focus on the microbial world? The Earth has been constantly inhabited for four billion years. For three-quarters of that time, life was solely microbial. Ancient microbes produced the gases that warmed the planet to clement temperatures when the sun was faint, and that invented the molecular machines that drive biogeochemical cycles. The co-evolution of Earth and life is woven into the fabric of our research group, which examines the interplay between microbes and the greenhouses gases that control planetary temperature. Our research informs the microbial metabolisms that (i) made the early Earth habitable for life, (ii) make the deep subsurface habitable for life, (iii) serve as biosignatures for life on exoplanets, and (iv) play crucial roles in regulating atmospheric fluxes of greenhouse gases on our warming planet.

Christopher E. Carr is an engineer/scientist with training in aero/astro, electrical engineering, medical physics, and molecular biology. At Georgia Tech he is an Assistant Professor in the Daniel Guggenheim School of Aerospace Engineering with a secondary appointment in the School of Earth and Atmospheric Sciences. He is a member of the Space Systems Design Lab (SSDL) and runs the Planetary eXploration Lab (PXL). He serves as the Principal Investigator (PI) or Science PI for several life detection instrument and/or astrobiology/space biology projects, and is broadly interested in searching for and expanding the presence of life beyond Earth while enabling a sustainable human future. He previously served as a Research Scientist at MIT in the Department of Earth, Atmospheric and Planetary Sciences and a Research Fellow at the Massachusetts General Hospital in the Department of Molecular Biology. He serves as a Scott M. Johnson Fellow in the U.S. Japan Leadership Program.