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. Last week, we covered early sessions (Science, 21 February, p. 1061); in this issue, we cover talks on mechanisms for resisting HIV, the maritime skills of early Americans, neutron stars, the demographic transition, and public attitudes about science.