Alessandro Maccarrone (Barcelona, 1980) holds a PhD in Theoretical Physics from the University of Barcelona, and is a science educator and secondary school teacher. His passion for mathematics came from his uncle, zio Illio, a lawyer by profession and a physicist at heart, and from the long afternoons spent listening to him tutor his cousins in maths. He studied at the Italian School of Barcelona, where he became a private tutor first for all his friends, then for almost the entire school. What he liked most about tutoring classes was being able to teach others to analyse and think, and to do so together and without leaving anyone behind. He decided not to study at the Scuola Normale Superiore in Pisa, one of the most prestigious of scientific universities, because he did not want to withdraw from everyday life and society, or from political and social activism in the CJC (Col·lectius de Joves Comunistes), the association that he was a member of in Barcelona. Later, he also abandoned his doctoral thesis because he felt there was no point in knowing all the secrets of black holes if the mathematical complexity that governs them is too complicated to explain to others. For fifteen years he has been dedicated to teaching and dissemination, and he has discovered that physics and mathematics are not only infinite in breadth, but also in depth, and that in the most basic and everyday questions lies a great wealth, complexity and beauty.