SCIENCEWEEK - PART A October 24, 2003 Vol. 7 Number 43A Contents: 1. Paleobotany: On Fossils of the First Land Plants 2. Cell Biology: On the Centrosome 3. Neuroscience: On Memory and the Cerebellum 4. Medicine: Adult Attention Deficit/Hyperactivity Disorder 5. Cosmochemistry: Isotope Composition of the Solar System 6. Quantum Physics: On Entanglement in Free Space 7. Earth Science: On Convection in Earth's Mantle 8. Science Policy: On the Education of Future Scientists =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=