Renzo Taddei is an anthropologist, and was previously an engineer, who lives and works in Brazil. The subject of his research is what is generally called “social studies of science and technology,” with a specific focus on the atmosphere. He is interested in many dimensions of the subject: currently, these include both what non-Western collectives do, think, and feel when they say that they are manipulating the atmosphere (through rituals, for instance), and what climate engineers do, think, and feel when they say they are creating large geoengineering schemes to save us from climate change. In the past, Renzo spent many years trying to understand what meteorologists and the so-called “rain prophets” of rural Brazil do, think, and feel when they predict the future states of the atmosphere.