Free and open to the public, the event, "On the Origins of Life and the Universe: An Afternoon with 2006 Nobel Laureates Craig Mello and John Mather," will be held at the Library of Congress from 2:00 to 4:00 p.m. on Thursday, July 26, in Room 119 of the Thomas Jefferson Building, 10 First Street S.E., Washington, D.C. Tickets and reservations are not required, but seating is limited. The program will be webcast live at www.loc.gov.