Chemistry rules

Rina Fernandez, a second-year student in Cornell's College of Veterinary Medicine, makes a DNA necklace for Sam Nolan, 5, right, at the annual Chemistry Fair at Pyramid Mall, Oct. 25, featuring tables set up by several Cornell departments with outreach efforts. At Fernandez's right is her son Tony Trujillo, 6, and behind them are Margaret Wertheim, center, a Cornell grad student in chemistry, and Herin Kaputkin, 13. Frank DiMeo/ University Photography