Opening remarks and presentations on the emergence of life on Earth, including "Gleaning Clues to Earth's Earliest Life from Modern Geothermal Systems," "The Origin of Life: What Do We Know?" and "RNA Worlds." Part of a day-long symposium on the origins of life, how we came to know it, and what it means. Speaker Biography: Mary Voytek is senior scientist for astrobiology at NASA's Science Mission Directorate. Speaker Biography: A well-known historian of recent science (science of the recent past), biology and biomedicine, Nathaniel Comfort is currently a professor at the Institute of the History of Medicine at The Johns Hopkins University. His books include "The Science of Human Perfection: How Genes Became the Heart of American Medicine" and "The Tangled Field: Barbara McClintock's Search for the Patterns of Genetic Control." He served as the Baruch S. Blumberg NASA/Library of Congress Chair in Astrobiology. Speaker Biography: Nsikan Akpan is science reporter and producer for the PBS NewsHour. Speaker Biography: Matt Schrenk is an assistant professor of geomicrobiology at Michigan State University. For transcript and more information, visit www.loc.gov/today/cyberlc/feature_wdesc.php?rec=7725

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