Complex sentence: They reproduce through external reproduction, and live to be quite old theyr exact lifespan is never mentioned, but Rygel have spent over 300 sycles (years) in Peacekeeper prison and still does not seem to be considered particularly old by Hynerian standards.
Split into simpler sentences: They reproduce through external reproduction, and live to be quite old, though theyr exact lifespan is never mentioned. It is known however that Rygel have spent over 300 sycles (years) in Peacekeeper prison, and still does not seem to be considered particularly old by Hynerian standards.