spin-barrier

The narrator settles into his new role running a medical clinic at Perihelion and develops a closer relationship with Jason, who reveals his secret illness and the immense pressures of managing the Spin project. Jason explains the technical and biological aspects of the Martian payload mission, which involves sending autonomous probes to inoculate Mars with engineered microbes to terraform the planet over long timescales. The chapter explores the hope and desperation behind humanity's attempt to extend life beyond Earth through slow, evolutionary processes.