Summary: The Brazil Indigenous Science and Religion Network (BISREN) aims to increase our understanding of the relationship between knowledge and belief within a Brazilian indigenous context. Its planned activities across 24 months will attract a range of academics from various subjects, such as the anthropology, psychology, and sociology of religion, the philosophy and history of science, and environmental studies. By the end of the project, we expect the network to have expanded its membership to over 500 active members and to have been awarded official recognition as an Interest Group (Grupo de Trabalho) by the Brazilian Ministry of Education. Brazil is home to more than 150 indigenous languages and cultures, but their worldviews, including the relationship between science and belief, are poorly known and understood both by the general public and academics. Nonetheless these indigenous worldviews have provided important insights for the work of anthropologists like Lévi-Strauss or, more recently,