"She has a big appetite as a result of her high metabolism," Ariel whispered in return.
Derec raised an eyebrow. "I hope Wolruf hasn't been doing that since you first came up on the roof. If she keeps using raw materials at this rate, she could start her very own energy crisis."
"Her people have a custom of big meals, anyway. Perhaps it's a sublimation of their other animal urges."
"You mean her kind might have begun their evolutionary history as meat-eaters, then evolved into vegetarians whose big meals relieved them of their urges to kill for food?"
"The predilection toward violence wasn't exactly what I had in mind."
"Hmmrn. From what I've seen of her sublimation activity, it's no wonder her species was unaware of space travel until their homeworld was first visited by aliens. They were all simply too busy burping to have time for scientific pursuits."
Derec had intended the remark perfectly innocently, but Ariel appeared genuinely shocked. "You know something, Derec? Your penchant for low humor never ceases to amaze me."
"Aw rrright, thiss one heard 'nuff this converr-sation line," said Wolruf in mid-chew, finally looking up from the plasti-dish. "It customary for ourrr kind to eat 'til full ohverrr and ohverrr when food is plen'iful. Ingrained instinct born of the trrrial and trrribulatshons of untold centurrries of hunting."
Mandelbrot stopped pressing dispensary buttons, turned, and looked down at the caninoid. "Forgive me, Wolruf, perhaps it is not my place to make such observations, but I estimate that once the energy from your repast is stored in your body cells, you will lose point-zero-zero-one percent of your natural speed, thus diminishing your survival abilities should fleetness of foot be required. Your next meal, should it be as large as this, would do even more damage."
"If she can't run, I'm sure she can roll," said Derec, crossing the lobby toward the alien and the robot.
The left side of Wolruf's mouth quivered as she growled. She cocked one ear toward the humans, and the other back toward the robot behind her. "Thiss one convinced humanz lack funnee bone."
Derec recalled as well how scratchy Wolruf's brown and gold coat had appeared when he had first met her, when he was being held captive by the alien Aranimas. Now her fur was slick and soft to the touch, no doubt due to the dietary improvements the robots had taken upon themselves to make. In some ways she resembled a wolf, with her flat face, unusually long, pointed ears, and her sharp fangs. A fierce intelligence burned behind her yellow eyes, reminding Derec that she was an alien from a culture about which he knew next to nothing, a creature who would have been new and strange and wonderful-perhaps even dangerous-in a world where she was the only mystery.
On the other hand, Mandelbrot was dependable and old-fashioned and predictable, and hence all the more wonderful because Derec had built him himself, from the spare parts provided by Aranimas, who had also indentured Wolruf as an aide. Mandelbrot was programmed to serve Derec first and foremost of all human beings. The other robots in Robot City were programmed to serve Doctor Avery first, and so Derec could never totally depend on them to follow his instructions to the letter. Sometimes when they did, they violated the spirit of the instructions. Mandelbrot adhered to the spirit as well.
Derec did not blame the robots of the city for their frequent evasions. After all, what else could anyone reasonably expect of a robot, so long as his behavior did not conflict with the Three Laws?
"How was your meditation, master?" asked Mandelbrot. "Did you achieve any insights that you would care to share with us?"
"No, but I did manage to get a few wires uncrossed." Before Mandelbrot-who tended to interpret Derec's remarks quite literally-could ask him which wires and where they might be, Derec told them about the spectacular building the city had grown. "It doesn't fit the character or context of the city's minimalist engineering at all, as if it's somehow the product of a totally different mind."
"No, therr'r cells here," protested Wolruf. "Could be result of unprezi'ented evolu'-onary developmen'."
Derec rubbed his chin as he thought about what Wolruf was saying. It made sense. The city's DNA-like codes could be mutating and developing on their own, just as bacteria and viruses evolved without mankind's notice or approval on the civilized worlds.
Mandelbrot nodded, as if deep in thought. The truth was, however, that his positronic potentials were sifting through all the information gained from the moment he had awakened in Derec's service, selecting the points relevant to the situation at hand in the hope that when they were juxtaposed into a single observation, it would shed new light on the matter. The conclusion that resulted from all this micromagnetic activity, unfortunately, left something to be desired. "It is much too early to speculate on what created the building, who did it, or why. Candor forces me to admit, though, that my private conversations with the native robots indicate their creative efforts might be permitting particular individuals to make what scholars refer to as a conceptual breakthrough."
"Why haven't you told me this earlier?" Derec asked in an exasperated tone.
"You did not ask, and I did not think it germane to any of our discussions of the last few days," said Mandelbrot evenly.
"Ah," said Ariel, her eyes widening. "Perhaps the robots have decided to experiment with humanoid behavior in the hopes of gathering empirical evidence. "
"I hope not," said Derec laconically. "It disturbs me to think I might have become some kind of scientific role model to them."
"What makes 'u think therr studying 'u?" asked Wolruf slyly.
"Come on," said Derec impatiently. "Time's a-wasting!"
Outside, the low, thick clouds rolling in from the horizon had began to reflect the opalescence, which in turn was mirrored in the shimmering, multifaceted buildings surrounding Derec and his friends. He felt as if the entirety of Robot City had been engulfed in a cool fire.
And deep in the city was the glowing point of origin-rotating with those varying shades, as if an industrial holocaust of mammoth proportions had disrupted the fabric of reality itself, exposing the scintillating dynamism that lay hidden beneath the surface of all matter. It was easy for Derec to imagine-just for the sheer joy of idle speculation-that the glow was expanding, gradually absorbing the rest of the city into its coolness.
Indeed, so bright were the reflections from the building beyond and the clouds above that occasionally a street's own lighting fixtures, which automatically switched on and off whenever it was occupied, stayed deactivated. The four found themselves traveling down streets shining with undiluted hues of blue or crimson, as if they had suddenly become immersed in the semihospitable fires of a mythological netherworld.
So it was indeed natural for Derec to assume that neither Mandelbrot nor Wolruf commented on the particulars of the unusual incandescence because some other matter was uppermost in their minds. That matter being the speed of the scooters he and Ariel were piloting through the streets. The hums of the electric engines echoed from the buildings as if a blight of locusts was nigh, and the screeching of the tires as they made their turns was like the howl of a photon explosion, blasting its target into an antimatter universe.
Ariel naturally had taken the lead. She had designed the scooters herself while Derec was preoccupied with other activities, and she had even convinced the engineer robots that the scooters' extra horsepower was actually good for the driver, since it would give her a chance to alleviate some of the "death wish" humans carried around with them. "Why do you think a First Law-either Robotics or Humanics-is necessary in the first place?" she had said. The engineers, who were quite mentally adept at solving practical problems, were unprepared to deal with that kind of logic, and so had no choice but to acquiesce to her demands.