PHYSICS: Dorian Raymer and Douglas Smith for proving that heaps of string or hair will inevitably tangle. CHEMISTRY: Sheree Umpierre, Joseph Hill and Deborah Anderson for discovering that Coca-Cola is an effective spermicide, and C.Y. Hong, C.C. Shieh, P. Wu and B.N. Chiang for proving it is not. ARCHAEOLOGY: Astolfo Gomes de Mello Araujo and Jose Carlos Marcelino for showing armadillos can scramble the contents of an archaeological dig. BIOLOGY: Marie-Christine Cadiergues, Christel Joubert and Michel Franc for discovering that fleas that live on a dog can jump higher than fleas that live on a cat. MEDICINE: Dan Ariely for...