One of Gop's tails scraped slightly against a huge boulder. The scales made a tractor-on-gravel sound. Pud thought in roars. The tiny creature had stopped and was turning its helmeted head this way and that, as if trying to see where the sound had come from. It had drawn a weapon of some sort from a holster at its belt—another thermonuclear popgun. The creature turned and came back toward the Vegans, heading for his ship. Pud lifted his tail again. The creature passed under it, reached the ship, joined its partner. "I heard it too, Johnny," Helen Gorman said nervously. "A loud scraping noise—" "It seemed to come from right behind me," Johnny Gorman said. "Damn near scared me off the planet ... I thought it was a rockslide. Or the biggest critter in creation, sneaking up on me. I couldn't see anything, though ... could you?" "No." Johnny stood there, blaster in hand, looking around, eyes sharp behind his faceplate. He saw nothing but flat, grayish-red ground, a scattering of stone outcroppings large and small; nothing but the star-clouded black of space above the near horizon, and the small sun of the system riding a low hillock like a beacon. "Blue light," he said thoughtfully. "Green light. Red and purple lights. And a mess of crazy colors we never saw before. Whatever those flashes were, honey, they looked artificial to me...." Helen frowned. "We were pretty far off-world when we saw them, Johnny. Maybe they were aurorae—or reflections from mineral pockets. Or magnetic phenomena of some kind ... that could be why the ship didn't handle right during landing—" Johnny studied the upside-down dials on the protruding chest-board of his spacesuit. "No neon in the atmosphere," he said. "Darned little argon, or any other inert gas. The only large mineral deposits within fifty miles are straight down. And this clod's about as magnetic as an onion." He gave the surrounding bleak terrain another narrow-eyed scrutiny. "I suppose it could have been some kind of aurora, though ... it's gone now, and there isn't a sign of anything that could have produced such a rumpus." He looked around again, then sighed and finally holstered his blaster. "Guess I'm the worrying type, hon. Nothing alive around here." "I