shoes that are white rather than some other color; What percentage of swimmers swim laps in the shallow end of a pool rather than the deep end; What percentage of automobile drivers almost, but not completely, come to a stop at one particular stop-sign; What percentage of commuters carry attaché cases; What percentage of shoppers exceed the number of items permitted in a supermarket's express checkout lane; What percentage of students dislike the taste of Brussels sprouts. Medicine – Presented to Eleanor Maguire, David Gadian, Ingrid Johnsrude, Catriona Good, John Ashburner, Richard Frackowiak, and Christopher Frith of University College London, for presenting evidence that the hippocampi of London taxi drivers are more highly developed than those of their fellow citizens. Peace – Presented to Lal Bihari, of Uttar Pradesh, India, for a triple accomplishment: First, for leading an active life even though he has been declared legally dead; second, for waging a lively posthumous campaign against bureaucratic inertia and greedy relatives; and third, for creating the Association of Dead People. Lal Bihari overcame the handicap of being dead, and managed to obtain a passport from the Indian government so that he could travel to Harvard to accept his Prize. However, the U.S. government refused to allow him into the country. His friend Madhu Kapoor therefore came to the Ig Nobel Ceremony and accepted the Prize on behalf of Lal Bihari. Several weeks later, the Prize was presented to Lal Bihari himself in a special ceremony in India. Physics – Presented to Jack Harvey, John Culvenor, Warren Payne, Steve Cowley, Michael Lawrance, David Stuart, and Robyn Williams of Australia, for their irresistible report "An analysis of the forces required to drag sheep over various surfaces". Psychology – Presented to Gian Vittorio Caprara and Claudio Barbaranelli of the University of Rome La Sapienza, and to Philip Zimbardo of Stanford University, for their discerning report "Politicians' Uniquely Simple Personalities". 2004 The ceremony took place on 30 September 2004. Biology – Presented to Ben Wilson of the University of British Columbia, Lawrence Dill of Simon Fraser University, Canada, Robert Batty of the Scottish Association for Marine Science, Magnus Wahlberg of the University of Aarhus, Denmark, and Håkan Westerberg of Sweden's National Board of Fisheries, for showing that herrings apparently communicate by farting. It has been suggested that the study of this phenomenon has had major political consequences. Following the sensational stranding of a Soviet