Description: in which an important experiment is disrupted In the eighth decade of the queendom of Sol, on a miniature planet in the middle depths of the Kuiper Belt, there lived a man named Bruno de Towaji who, at the time of our earliest attention, was beginning his 3088th morning walk around the world. The word "morning" is used advisedly here, since along the way he walked through the day and night and back again without pausing to rest. It was a very small planet, barely six hundred meters across, circled by an even tinier "sun" and "moon" of Bruno''s own design. Walk with him: see his footpath cutting through the blossomy mea- dow, feel the itch of pollens in your eyes and nose. Now pass through into the midday forest, with its shafts of sunlight filtering warmly through the canopy. The trees are low and wide, citrus and honeysuckle and dogwood, not so much a shady, mushroom-haunted wilderness as a compromise with physical law--taller trees would reach right out of the troposphere. As it is, the highest limbs brush and break apart the puffy summer clouds that happen by. Pass the Northern Hills; watch the stream trickle out between them; see the forest give way to willows at its bank. The bridge is a quaint little arch of native wood; on the far side lie the grasslands of afternoon, the vegetable gardens tended by stoop-backed robots, the fields of wild barley and maize tended by no one, lit by slantwise rays. Behind you, the sun dips low, then slips behind the planet''s sharply curved horizon. Despite the refraction of atmospheric hazes, darkness is sudden, and with it the terrain grows rocky--not jagged but hard and flat and boulder-strewn, dotted with hardy Mediterranean weeds. But here the stream winds back again, and as evening fades to night the channel of it widens out into cattail marshland and feeds, and finally, into a little freshwater sea. Sometimes the moon is out, drawing long white reflections across the silent water, but tonight it''s only the stars and the Milky Way haze and the distant, pinpoint gleam of Sol. All of history''s down there; if you like, you can cover the human race with your hand. It grows colder; realize the planet shields you from the little sun-- the only local heat source--with the deadly chill of outer space so close you could literally throw a rock into it. But the beach leads around to twilight meadows, and the horizon ruddies up with scattered light, and then suddenly it''s morning again, the sun breaking warmly above the planet''s round edge. And there is Bruno''s house: low, flat, gleam- ing marble-white and morning-yellow. You''ve walked a little over two kilometers. Such was Bruno''s morning constitutional, very much like all his others. Sometimes he''d fetch a coat and take the other route, over the hills, over the poles, through cold and dark and cold and hot, but that was mainly a masochism thing; the polar route was actually shorter, and a good deal less scenic. He''d already eaten breakfast; the walk was to aid his digestion, to invigorate his mind for the needs of the day: his experiments. The front door opened for him. Inside, robot servants stepped gracefully out of his way, providing a clear path to the study, bowing as he passed, though he''d told them a thousand times not to. He grumbled at them wordlessly as he passed. They didn''t reply, of course, though their bronze and tin-gray manikin bodies hummed and clicked with faint life. Mechanical, unburdened by imagination or want, they were utterly dedicated to his comfort, his satisfaction. Another door opened for him, closed behind him, vanished. He waved a hand, and the windows became walls. Waved another, and the ceiling lights vanished, the floor lights vanished, the desk and chairs and other furnishings became optical superconductors: invisible. Projective holography created the illusion of his day''s apparatus: fifty collapsons, tiny perfect cubes visible as pinpoints of Cerenkov light, powder-blue and pulsing faintly, circling the holographic planet in a complex dance of swapping orbits. He''d spent the past week assembling these, after his last batch had gone sour. Assembling them? Certainly. Imagine a sphere of di-clad neutronium, shiny with Compton-scattered light. It''s a sort of very large atomic nucleus; a billion tons of normal matter crushed down to a diameter of three centimeters so that the protons and electrons that comprise it are bonded together into a thick neutron paste. Left to itself it would, within nanoseconds, explode back into a billion tons of protons and electrons, this time with considerable outward momentum. Hence the cladding: crystalline diamond and fibrediamond and then crystalline again, with a bound layer of well-stone on top. Tough stuff indeed; breaking the neutrons free of their little jail was difficult enough that Bruno had never heard of its happening by accident. These "neubles" were the seeds of seeds--it took eight of them, crushed unimaginably farther, to build a collapson--and the little "moon" was actually just Bruno''s storage bin: ten thousand neubles held together by their own considerable gravity. Another fifteen hundred formed the core of the tiny planet, a sphere about half a meter across, with a skeleton of wellstone built on top of it, fleshed out with a few hundred meters of dirt and rock and an upper layer neatly sculpted by robots and artisans.

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