Tuf Voyaging by George R. R. Martin

a tyrannosaurus rex, anyway?
    At least there was no one out there but Nevis.
     
    Without the trace to guide him, Jefri Lion had wasted no time getting lost in the maze of interconnected corridors. Finally, he had adopted a simple policy; choose the wider corridors over the narrower, turn right where the passages were of the same size, go down whenever possible. It seemed to work. In no time at all, he heard a noise.
    He flattened himself against a wall, although the attempt at concealment was somewhat compromised by the ungainly bulk of the plasma cannon on his back. He listened. Yes, definitely, a noise. Up ahead of him. Footsteps.
Loud
footsteps, though at some distance, but coming his way—Kaj Nevis in his battlesuit.
    Smiling to himself with satisfaction, Jefri Lion unslung the plasma cannon and began to erect its tripod.
     
    The tyrannosaur roared.
    It was, thought Haviland Tuf, a thoroughly frightening sound. He pressed his lips firmly together in annoyance and squirmed back another half-meter into his niche. He was decidedly uncomfortable. Tuf was a big man, and there was very little room down here. He sat with his legs jammed under each other awkwardly, his back bent over in a painful manner, and his head bumping against the work station above. Yet he was not ungrateful. It was a small niche, true, but it had given him a place to seek shelter. Fortunately, he had been deft enough to attain that shelter. He was fortunate, also, in that the work station, with its waldos and microscanner and computer terminal, rested upon a heavy, thick, metal table that extruded itself from floor and wall, and not simply a flimsy item of furniture to be easily brushed aside.
    Nonetheless, Haviland Tuf was not entirely pleased with himself. He felt foolish; his dignity had been decisively compromised. No doubt his ability to concentrate on the task at hand was, in its own way, commendable. Still, that degree of concentration might be considered a liability when it allowed a seven-meter-tall carnivorous reptile to sneak up on one.
    The tyrannosaur roared again. Tuf could feel the work station vibrate overhead. The dinosaur’s massive head appeared about two meters in front of his face, as the beast leaned over, counterbalanced by its great tail, and tried to get in at him. Fortunately, its head was too large and the niche too small. The reptile pulled out and screamed its frustration; echoes rebounded all up and down the central cloning chamber. Its tail lashed around and smashed into the work station; the sheltering table shook to the impact, something shattered up above, and Tuf winced.
    “Go away,” he said as firmly as he could. He rested his hands atop his paunch and attempted to look stern.
    The tyrannosaur paid him no heed… “These vigorous efforts will avail you naught,” Tuf pointed out. “You are too large and the table too sturdily built, as would be readily apparent to you had you a brain larger than a mushroom. Moreover, you are undoubtedly a clone produced from the genetic record contained within a fossil. Therefore, it might be argued that I have a superior claim to life, on the grounds that you are extinct and ought properly to remain so. Begone!” The tyrannosaur’s reply was a furious squirming lunge and a wet bellow that sprayed Tuf with fine droplets of dinosaur saliva. The tail came down once more.
     
    When she first caught a flicker of movement out of the corner of her eye, Celise Waan squeaked in panic.
    She backpedaled and whirled to face—to face what? There was nothing there. But she had been certain that she’d seen something, up near that open door. What, though? Nervously, she unholstered her dart-pistol. She’d abandoned the laser rifle quite a distance back. It was cumbersome and heavy, and the effort of lugging it around had tired her out. Besides, she doubted that she’d be able to hit anything with it. The pistol was much preferable, in her view. As Jefri Lion had explained it, it threw