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.

Our goal is to contribute to the fundamental understanding of the Earth's biogeochemical cycling in the present and past climate, to conduct research in Ecosystem and Biogeochemistry, Ocean Carbon Cycle, Global Climate Change, and Ocean Deoxygenation using computational modeling, observations and AI/machine learning approaches. 

My primary interest is floating ice systems - Jupiter's moon Europa and Earth's ice shelves. I am interested in how these environments work and how they may become habitable. I have chosen to focus on Europa because of its potential to have what other places may not have: a stable source of energy from tides that can power geological cycles over the lifetime of the solar system. At its most basic form, life is like a battery, depending upon redox reactions to move electrons. A planetary proxy for this is activity, whereby a planet recycles through geologic processes, and maintains chemical gradients of which life can take advantage. Without recycling, it is possible that even once habitable environments can become inhospitable. This is where terrestrial process analogs come into the picture - by studying how ice and water interact in environments on Earth we can better understand the surface indications of such on Europa (and other icy worlds). My work provides a framework by which to remotely understand planetary cryospheres and test hypotheses, until such time as subsurface characterization becomes possible by radar sounding, landed seismology, or one day, roving submersibles. Much work remains to correlate observations and models of terrestrial icy environments - excellent process analogs for the icy satellites - with planetary observations. I think about how to incorporate melting, hydrofracture, hydraulic flow, and now brine infiltration as process analogs into constructing models for the formation of Europa's geologic terrain and to study the implications for ice shell recycling and ice-ocean interactions. The inclusion of realistic analogs in our backyard-Earth's poles -using imaging and geophysical techniques is a common thread of this work, giving tangible ways to generate and test hypotheses relevant to environments on Earth and Europa. In the long term, I envision constructing systems-science level models of the Europan environment to understand its habitability and enable future exploration. I'm lucky to work with a talented group of students, post docs, and collaborators who share this vision and continue to make my life's passion, understanding the worlds around us, tenable.

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.

I'm an Associate Professor of Biogeochemistry in the School of Earth & Atmospheric Sciences at the Georgia Institute of Technology. 

My research explores the ways in which Earth's biosphere and planetary boundary conditions act to reshape ocean/atmosphere chemistry and climate, how these interactions have evolved over time, and how they might be engineered moving forward. The work I do is inherently interdisciplinary, and utilizes an ensemble of tools including computer models of ocean, sediment, and soil biogeochemistry, stable isotope and trace element tracers, and analysis of modern natural systems.

Jenny became an Assistant Professor at Georgia Tech in August 2017. She uses both modern and paleontological specimens to identify how populations, species, and communities have responded to past climate change. Her goal is to identify strategies to conserve as much biodiversity as possible given rapidly shifting climates. She received her PhD from the Dept. of Integrative Biology at UC-Berkeley, and did postdoctoral research at the National Evolutionary Synthesis Center and at the University of Washington.

Yuanzhi Tang holds undergraduate degrees in Geology and Economics from Peking University, China. She earned a Ph.D. degree in Environmental Geochemistry at Stony Brook University and then continued working in the microbiology group of Prof. Colleen Hansel.

Tang joined the Georgia Tech faculty in 2013 as an assistant professor and is now an associate professor in the School of Earth and Atmospheric Sciences.