SEATTLE-Over 5000 people turned out for the Annual Meeting and Science
Innovation Exposition of the American Association for the Advancement
of Science (AAAS, which publishes Science), held 13 to 18 February. L
ast week, we covered early sessions (Science, 21 February, p. 1061); i
n this issue, we cover talks on mechanisms for resisting HIV, the mari
time skills of early Americans, neutron stars, the demographic transit
ion, and public attitudes about science.