[Magazine] Scientific American. Vol. 275. No 5

Cover 1 Table of Contents 2 From the Editors 4 Letters to the Editors 5 50, 100 and 150 Years Ago 6 In Focus 7 Science and the Citizen 9 Cyber View 16 Technology and Business 17 Profile: Thereza Imanishi-Kari 22 The Case for Electric Vehicles 24 Immunity and the Invertebrates 30 Sharks and the Origins of Vertebrate Immunity 35 Quantum Seeing in the Dark 40 Global Climatic Change on Mars 47 Can China Feed Itself? 56 Dyslexia 63 Rock Art in Southern Africa 70 The Amateur Scientist 78 Mathematical Recreations 80 Reviews and Commentaries 83 Working Knowledge: Television Ratings 91