SCIENCEWEEK - PART A November 28, 2003 Vol. 7 Number 48A Contents: 1. Astronomy: Liquid Surfaces on the Moon Titan 2. Applied Physics: Detecting Single Photons 3. Air Pollution, Climate Forcing, and a Global Hydrogen Economy 4. Neurobiology: Ultraviolet Vision in a Bat 5. Physiology: Genetic Factors in Metabolic Rates 6. Genomics and Global Health =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=