For the first couple decades of its existence, NASA was the epitome of an Old Boys Club; its astronaut ranks pulled exclusively from the Armed Services' test pilot programs which, at that time, were exclusively staffed by men. Glass ceilings weren't the only things broken when Sally Ride, Judy Resnik, Kathy Sullivan, Anna Fisher, Margaret "Rhea" Seddon and Shannon Lucid were admitted to the program in 1978 — numerous spaceflight systems had to be reassessed to accommodate a more diverse workforce. In The Six: The Untold Story of America’s First Women Astronauts, journalist Loren Grush...