MathTrek, by Julie J. Rehmeyer and others, provides glimpses of mathematics at work in a wide variety of contexts, from games and puzzles to literature and art. Topics range from geometry in Islamic art to new discoveries in the realm of prime numbers. Entries before Feb. 14, 2007, were written by Ivars Peterson, former Science News math writer and now Director of Publications for Journals and Communications at the Mathematical Association of America.

Food for Thought, by Janet Raloff and others, provides an understanding of foods, their marketplace, the impact of nutrition, and societal and environmental implications of food production. This column reports new developments in nutrition, food science, and technology and provides current information on health impacts of dietary choices and environmental aspects food's journey from the field to the dinner plate. Janet Raloff covers the environment and science policy for Science News.