Conférence : Are we alone ? How Earth’s early oceans and atmosphere help guide the search for life beyond our solar system.
La faculté des Sciences Fondamentales et Appliquées a le plaisir de recevoir le professeur Timothy W. Lyons de l'université River Side de Californie.Il donnera une conférence intitulée : Are we alone ? How Earth’s early oceans and atmosphere help guide the search for life beyond our solar system.
AbstractLife and life-sustaining environments, including oceans, have existed on a dynamic Earth for more than four billion years. Each of our many past planetary states was associated with a particular atmospheric composition, and those atmospheres contained gases such as oxygen and methane that were produced by Earth’s early life. Using ancient Earth to understand when and how these biosignature gases accumulatedis allowing us to select targets and techniques for exploring the many Earth-like planets beyond our solar system. The talk will also address NASA’s latest missions and discoveries within our solar system.
Timothy Lyons currently leads the ‘Alternative Earths’ team of the NASA Astrobiology Institute. He is afellow of the Geological Society of America, the American Association for the Advancement of Science, the Geochemical Society, the European Association of Geochemistry, and the American Geophysical Union. He has been honored with visiting professorships throughout the world and is an Honorary Professor at the University of St. Andrews.
He holds a B.S. from the Colorado School of Mines, an M.S. from the University of Arizona, and a Ph.D. from Yale University. Hisprimary research interests include astrobiology, geobiology, Earth history, and the search for life beyond our solar system.
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