Guilherme Ost’s work promises to reveal more fundamental complexities of the most mysterious organ in the human body. With the advancement of technology, we can now simultaneously record the activity of tens to thousands of neurons. However, this view still represents only the “tip of the iceberg” of brain functioning. Ost’s project seeks to develop mathematical and computational tools to expand the understanding of inferring and interpreting interactions between neurons when we observe only a tiny part of a vast neural network. With a degree in mathematics from the Pontifical Catholic University of Rio Grande do Sul, he also has a master’s degree in mathematics from the Federal University of Rio Grande do Sul and a doctorate in statistics from the University of São Paulo. He has three postdoctoral periods, two at USP and one at the Université de Cergy-Pontoise, France.