In her book "Packing for Mars: The Curious Science of Life in the Void," Mary Roach explores the unique and often amusing aspects of space travel. One point she makes is that astronaut selection isn't influenced by physical attributes such as penis size, emphasizing that the criteria focus on skills, training, and psychological fitness rather than superficial characteristics.

Roach's work sheds light on the rigorous process of becoming an astronaut, highlighting the importance of teamwork and adaptability in the challenging environment of space. By addressing misconceptions and providing insights into the astronaut selection process, she demystifies the path to becoming part of the elite group known as astronauts.