The 2008 Ig Nobel winners, awarded Thursday at Harvard University by the Annals of Improbable Research magazine:

NUTRITION: Massimiliano Zampini and Charles Spence for demonstrating that food tastes better when it sounds better.

PEACE: The Swiss Federal Ethics Committee on Non-Human Biotechnology and the citizens of Switzerland for adopting the legal principle that plants have dignity.

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 demonstrating that expensive fake medicine is more effective than cheap fake medicine.

COGNITIVE SCIENCE: Toshiyuki Nakagaki, Hiroyasu Yamada, Ryo Kobayashi, Atsushi Tero, Akio Ishiguro and Agota Toth for discovering that slime molds can solve puzzles.

ECONOMICS: Geoffrey Miller, Joshua Tyber and Brent Jordan for discovering that exotic dancers earn more when at peak fertility.

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.

LITERATURE: David Sims for his study "You Bastard: A Narrative Exploration of the Experience of Indignation within Organizations."

• Click here to visit's Natural Science Center.