In her book "Packing for Mars: The Curious Science of Life in the Void," Mary Roach delves into the field of space psychology. She highlights the importance of understanding mental health in space travel, where the isolation and unique stresses of the environment can impact astronauts significantly. Researchers aim to develop methods for detecting stress or signs of depression, particularly in individuals who may not be forthcoming about their emotional state.

This focus on proactive detection is crucial as space missions become longer and the psychological well-being of crew members directly affects mission success. Detecting hidden emotions ensures that astronauts receive the support they need, contributing to safer and more effective missions beyond Earth.