JOE SCHWARCZ is director of McGill University's Office for Science and Society. He teaches courses on nutrition and the applications of chemistry to everyday life. His informative and entertaining public lectures range from nutritional controversies to the chemistry of love. Schwarcz has received numerous awards, including the Royal Society of Canada's McNeil Award, and is the only non-American to win the American Chemical Society's prestigious Grady-Stack Award. He is the author of five titles, including Let Them Eat Flax. He was also the chief consultant for the blockbuster titles Foods That...