 What isn't a reason for bringing the creature back to the ship?
They were something more—and something less—they were, in short, humanity's hopes for survival! Earth couldn't turn out enough starmen in the schools, so promising kids were being shipped out for training as cadets on their twelfth birthday. But something had happened to the exploration party fifteen years back, and to the more recent ship under Hennessy that was sent to check up. Even the deep gorge where they'd found Hennessy's carefully buried ship was completely hidden by the fog. Earth had ordered him to detour here, after leaving his load of deep-sleep stored colonists on Official World 71, to check on any sign of Hennessy. One, at the front, was stuttering into life, and Gwayne dashed for it as the exit port slid back.
 they want revenge for what it did to the cadets
 they want to learn more about him  they want to know why the ship had been hidden  they want to know what happened to Hennessy's group  they want revenge for what it did to the cadets