narcissists by examining their eyebrows. Peace: The governments of India and Pakistan, for having their diplomats surreptitiously ring each other's doorbells in the middle of the night, and then run away before anyone had a chance to answer the door. Physics: Ivan Maksymov and Andriy Pototsky, for determining, experimentally, what happens to the shape of a living earthworm when one vibrates the earthworm at high frequency. Economics: Christopher Watkins, Juan David Leongómez, Jeanne Bovet, Agnieszka Żelaźniewicz, Max Korbmacher, Marco Antônio Corrêa Varella, Ana Maria Fernandez, Danielle Wagstaff, and Samuela Bolgan, for trying to quantify the relationship between different countries’ national income inequality and the average amount of mouth-to-mouth kissing. Management: Xi Guang-An (), Mo Tian-Xiang (), Yang Kang-Sheng (), Yang Guang-Sheng (), and Ling Xian Si (), five professional hitmen in Guangxi, China, who managed a contract for a hit job (a murder performed for money) in the following way: After accepting payment to perform the murder, Xi Guang-An then instead subcontracted the task to Mo Tian-Xiang, who then instead subcontracted the task to Yang Kang-Sheng, who then instead subcontracted the task to Yang Guang-Sheng, who then instead subcontracted the task to Ling Xian-Si, with each subsequently enlisted hitman receiving a smaller percentage of the fee, and nobody actually performing a murder. Entomology: Richard Vetter, for collecting evidence that many entomologists (scientists who study insects) are afraid of spiders, which are not insects. Medicine: Nienke Vulink, Damiaan Denys, and Arnoud van Loon, for diagnosing a long-unrecognized medical condition: Misophonia, the distress at hearing other people make chewing sounds. Medical Education: Jair Bolsonaro of Brazil, Boris Johnson of the United Kingdom, Narendra Modi of India, Andrés Manuel López Obrador of Mexico, Alexander Lukashenko of Belarus, Donald Trump of the United States, Recep Tayyip Erdoğan of Turkey, Vladimir Putin of Russia, and Gurbanguly Berdimuhamedow of Turkmenistan, for using the COVID-19 viral pandemic to teach the world that politicians can have a more immediate effect on life and death than scientists and doctors can. Materials Science: Metin Eren, Michelle Bebber, James Norris, Alyssa Perrone, Ashley Rutkoski, Michael Wilson, and Mary Ann Raghanti, for showing that knives manufactured from frozen human feces are not effective tools for skinning or butchery. 2021 The 31st First Annual Ig Nobel Prize ceremony took place on Thursday, 9 September 2021 and was webcast. Biology: Susanne Schötz, Robert Eklund and Joost van de Weijer for analyzing variations in purring,