In 2040, NASA despatches a space mission to explore an Earth-like planet orbiting a nearby star, returning in 2101 to a very different world from the one it left. Crewed by a transman and a transwoman who has had a womb transplant, the birth of identical twins genetically engineered to have opposite sex is a definitive test of the nature/nurture issue. However, the death of their transman mother during their birth forces the remaining crew member and the onboard chatbot to become the twins’ parents and bring them up as best they can, forcing them to change their names, genders, and pronouns in ways never foreseen by NASA…
Dialogues between the chatbot, the remaining crew member and the twins provide the means for the author to introduce readers to a totally new way of thinking about human nature, based on the latest advances in genetics, neuroscience, and evolutionary psychology.