The Spaceborn Peloran are the greatest population of Peloran outside the Peloran homeworlds. They can’t actually live in space, since they still need to breath air, but they were designed to hold onto their internal air far better than normal humans. They can go as long as ten minutes without breathing without side effects, but need oxygen masks for longer periods of time in vacuum. Science fiction stories would give them telepathy to communicate, since talking in vacuum is impossible, but in real life they were designed with a far more mundane communication system. Fingers. They are born knowing a form of sign language specifically optimized for combat, allowing them to communicate in nearly any environment. So remember that. A silent Peloran is not necessarily a non-communicative Peloran.