b'Carnegie Science|Fall 2019 3Carnegies Michael Walterand Robert HazenElected AGU FellowsWorking to Understand and Fight Climate Changemarine ecosystems, Carnegies Arthur Grossman joined an international team of researchersMichael Walter (left) and Robert Hazen (right) were elected investigating the possibility of reviving bleached coralC 2019 Fellows of the American Geophysical Union.Images courtesy Carnegie Institution for Sciencereefs by repopulating them with heat-resistant algae. Their study, published in The ISME Journal arnegie scientists Michael Walter and Robert Hazen , found that the hardier non-native algae produce a different,have been elected 2019 Fellows of the American less-optimal panel of nutrients. However, theirGeophysical Union (AGU). findings suggest that future research might identifyThe AGU is an international nonprofit scientific cellular mechanisms in non-native algae that wouldassociation with 60,000 members in 137 countries. Only support coral resilience. one out of every thousand members is selected as a While climate scientists race to find pragmaticmember of the fellow class each year. new solutions to global warming, CarnegieFellows are recognized for visionary leadership and scientific researchers are looking to the stars to find newexcellence that has fundamentally advanced research in the Earth and answers to a (literally) existential question: whatspace sciences. Their breadth of interests and the scope of their fundamental conditions are necessary to make acontributions are remarkable and often groundbreaking, said the planet suitable for life? Our ongoing quest toorganization in its announcement of the new class. understand planetary habitability recently led toCongratulations to Mike and Bob on this achievement, said discovery of a hot Earth exoplanet orbiting insideCarnegie President Eric D. Isaacs. They are both emblematic of the the habitable zone of a dwarf star 31 light-years away,kind of bold, field-defining research that forms the bedrock of our in the Hydra constellation. The planet was discoveredinstitutional mission. by an international team that included CarnegieThe director of Carnegies Geophysical Laboratory, Walter is an astronomers and instrumentation specialists workingexperimental petrologist whose research focuses on early Earths in collaboration with NASAs Transiting Exoplanethistory, shortly after the planet accreted from the cloud of gas and dust Survey Satellite (TESS). The rocky planets Earth-likesurrounding our young Sun, when its mantle and core first separated size and high temperatures make it highly suitable forinto distinct layers. He also investigates the structure and properties of research on exoplanet atmospheric compositions.various minerals and other compounds under the extreme pressures As we continue to confront the frighteningand temperatures found deep in Earths interior, with a focus on consequences of greenhouse gas-driven climategleaning information about mantle conditions from impurities change, we can be both proud and encouraged topreserved inside diamonds. know that our core values of independence, creativity,Hazen is a staff scientist at the Geophysical Laboratory with an and intellectual rigor are making Carnegie scientistsexpertise in mineralogy. He is also the principal investigator of the Deep leaders in this vital effort. Carbon Observatory, which is dedicated to probing the chemical and biological roles of carbon in Earths interior. He pioneered the concept of mineral evolutionlinking an explosion in mineral diversity to the rise of life on Earth and the resulting oxygen-rich atmosphereand introduced the idea of mineral ecology, which analyzes the spatial Eric D. Isaacs distribution of Earths minerals to predict which ones remain President undiscovered and to assert our planets mineralogical distinctiveness.'