Cal reads about artificial intelligence models that have written their own code in order to escape being shut down. He ponders the friction between the light side and dark side of AI as he mourns the passing of the photographer Sebastiao Salgado, who made a life of finding the best in humanity in some of the darkest times imaginable. Sebastiao and his wife, Lelia, replanted a denuded ranch in Brazil that had lost its birds and animals with 2.5 million trees and restored it into a pristine forest, leaving behind a powerful legacy of light over darkness.