diet is significantly lower than the caloric intake from most other traditional meat diets. Peace: Francisco Alonso, Cristina Esteban, Andrea Serge, Maria-Luisa Ballestar, Jaime Sanmartín, Constanza Calatayud, and Beatriz Alamar, for measuring the frequency, motivation, and effects of shouting and cursing while driving an automobile. Reproductive Medicine: John Barry, Bruce Blank, and Michel Boileau, for using postage stamps to test whether the male sexual organ is functioning properly—as described in their study "Nocturnal Penile Tumescence Monitoring With Stamps." Economics: Lindie Hanyu Liang, Douglas Brown, Huiwen Lian, Samuel Hanig, D. Lance Ferris, and Lisa Keeping, for investigating whether it is effective for employees to use Voodoo dolls to retaliate against abusive bosses. 2019 The ceremony took place on 12 September 2019. Medicine: Silvano Gallus, for collecting evidence that pizza might protect against illness and death, if the pizza is made and eaten in Italy. Medical Education: Karen Pryor and Theresa McKeon, for using a simple animal-training technique—called "clicker training"—to train surgeons to perform orthopedic surgery. Biology: Ling-Jun Kong, Herbert Crepaz, Agnieszka Górecka, Aleksandra Urbanek, Rainer Dumke, and Tomasz Paterek, for discovering that dead magnetized cockroaches behave differently than living magnetized cockroaches. Anatomy: Roger Mieusset and Bourras Bengoudifa, for measuring scrotal temperature asymmetry in naked and clothed postmen in France. Chemistry: Shigeru Watanabe, Mineko Ohnishi, Kaori Imai, Eiji Kawano, and Seiji Igarashi, for estimating the total saliva volume produced per day by a typical five-year-old child. Engineering: Iman Farahbakhsh, for inventing a diaper-changing machine for use on human infants. Economics: Habip Gedik, Timothy A. Voss, and Andreas Voss, for testing which country's paper money is best at transmitting dangerous bacteria. Peace: Ghada A. bin Saif, Alexandru Papoiu, Liliana Banari, Francis McGlone, Shawn G. Kwatra, Yiong-Huak Chan, and Gil Yosipovitch, for trying to measure the pleasurability of scratching an itch. Psychology: Fritz Strack, for discovering that holding a pen in one's mouth makes one smile, which makes one happier—and for then discovering that it does not. Physics: Patricia Yang, Alexander Lee, Miles Chan, Alynn Martin, Ashley Edwards, Scott Carver, and David Hu, for studying how, and why, wombats make cube-shaped feces. 2020 The ceremony took place on 17 September 2020 and was webcast. Acoustics: Stephan Reber, Takeshi Nishimura, Judith Janisch, Mark Robertson, and Tecumseh Fitch, for inducing a female Chinese alligator to bellow in an airtight chamber filled with helium-enriched air. Psychology: Miranda Giacomin and Nicholas Rule, for devising a method to identify