CSIRO, Australia's national science agency, is asking people to log their farts for a study on gut health. The research aims to understand the frequency, stench, loudness, and duration of farts, as well as their link to diet. Dietician Megan Rebuli explains that passing wind is a natural occurrence and a sign of a healthy digestive system. The agency is hoping to get data from tens of thousands of people, including adults and children, to help researchers better understand the nation's gut health. People can track their flatulence using the free Chart Your Fart phone app, which will help researchers analyze the data and answer the question: what is normal?