An international team of researchers led by Ilona Croy, Tomasz Frackowiak, Thomas Hummel, and Agnieszka Sorokowska recently won an Ig Nobel Prize for their study on why babies are often perceived as smelling more pleasant than teenagers. The research, published in 2017, involved 255 parents who rated the body odor of their children and their partners. The results showed that parents generally found the scent of babies and young children more pleasant than that of their romantic partners. This preference decreased as children grew older, and this pattern occurred regardless of how close the parent-child relationship was. To further explore this phenomenon, the study involved more than 300 children of various ages. Participants, including both parents and non-parents, were exposed to body odor samples. Some parts of the research used functional magnetic resonance imaging (fMRI), a technique that scans brain activity, to observe how different odors affected the brain. The findings indicated that the smell of infants activates brain regions associated with pleasure and reward, which may encourage caregiving behaviors. However, around puberty, parents had more difficulty recognizing their teenagers by smell. In some cases, mothers showed a dislike for the body odor of their sons, and fathers showed similar feelings toward their daughters. After puberty, parents gradually became accustomed to their children's changing scents and began to prefer them again. The study highlights the role of body odor in conveying important social and biological information that influences human interactions. According to Croy, the research could also offer insights into the nature of love. Humans are biologically inclined to care for their offspring, and the study suggests that people can develop affection for the scents of those close to them, even as those scents change over time. The Ig Nobel Prize ceremony took place on September 3, 2026, at the Kongresshaus Zürich in Switzerland. This was the first time the event was held in Europe after 35 years of annual ceremonies in the United States. The shift was partly due to visa restrictions and concerns about immigration and border policies, which made it difficult for some international teams to travel to the U.S. Each year, the Ig Nobel Prizes, awarded by the Annals of Improbable Research, honor 10 studies that are both surprising and thought-provoking.