Contents

19 November 1993
Vol 262, Issue 5137

About The Cover

Science and a Changing World is the theme for the 1994 AAAS annual meeting in San Francisco from 18 to 23 February. This is the 160th AAAS meeting, and it upholds our interdisciplinary tradition as researchers from every facet of science—including medical, environmental, evolutionary, physical, social, and technological—convene to exchange and publicize new knowledge. See page 1287 for a complete program and registration information. [Earth image: National Aeronautics and Space Administration. Additional illustration: Tracy Keaton Drew, Washington, DC]