"El árbol de la ciencia" is a novel written by the Spanish author Pío Baroja in 1911. The story follows the life of a young medical student named Andrés Hurtado, who grapples with existential questions and the meaning of life while studying in Madrid. The novel explores themes of science, philosophy, and the struggles of modernity. The narrative reflects Baroja's own experiences and critiques the societal norms of his time. Through Andrés' journey, the book delves into the conflict between rational thought and emotional turmoil, ultimately portraying the challenges faced by individuals seeking knowledge and purpose in a rapidly changing world.