Other Worlds Than These

the parameters. But the portal only opened if you’d satisfied consistency checks and if (as far as the machine could tell) the universe was stable. Somehow the pathways to other universes intersected within the cores of stars, hence Ubbiri’s surprising arrival.

Not long after, Ubbiri died. She left a note stating that there were three things she was grateful for: her white dwarf star, Rudrak, and spending her last days with Birha.

A quarter-cycle after Ubbiri’s death, Rudrak came for the first time into Birha’s life.

A Rumination on Thirru, or Rudrak

There is a rift valley between us, a boundary that might separate two people or two universes. I’ve been exploring there, marveling at the tortured geometries of its sheer walls, the pits and chasms on its floor. Through them I’ve sometimes seen stars. So far I’ve avoided falling in, but who knows? One day maybe I’ll hurtle through the layer between this universe and that, and find myself a meteor, a shooting star falling into the gravity well of a far planet.

What if a meteor changed its mind about falling? Would the universe allow it? Only if the rock fell under the sway of another imperative that lifted it beyond gravity’s grasp. But where, in that endless sky, would it find the rift from which it had emerged? It would have to wander, searching, until the journey became an end in itself. And then, one day when the journey had changed it beyond recognition, it would find the rift and it would stand on the lip of it, wondering: Should I return?

But I am not a rock. I am a person, slowly ripening in the sun of this world, like a pear on a tree. I am not hard, I am not protected by rocky layers.

Still, I cannot soar through your sky without burning.

Theories of Probability

What the actualizer did was change probabilities. So sometimes things that were highly improbable, like walking through a wall, or tossing five thousand coins so that heads came up every time—all those things could become much more likely.

Birha thought that in some sense people had always known about the other branches of the kalpa-vriksh. So many of humankind’s fantasies about the magical and the impossible were simply imaginative leaps into different regions of the cosmic tree. But to go to the place of your imagining in the flesh…that wasn’t possible before the actualizer’s discovery. If you adjusted the parameters, the actualizer would tweak the probability amplitudes to make your fairytale universe. Or perhaps it only opened a portal to an already existing one. What’s the difference? So much for you, entropy, for heat death, for death. Make it more likely that you live from fatal cancer than an ant bite…

But you couldn’t always predict how the amplitudes would work for complex systems like universes, and whether programming in coarse features you desired would give too much creative freedom to subsystems, resulting in surprises beyond imagining, and not always pleasant ones. Thus a mythology had already grown around the actualizer, detailing the possible and impossible other universes and their dangers. One made-up story related how they put in the parameters, the universal physical constants and the wavefunction behavior in space and time, and there came to be an instability in the matter of that universe that made people explode like supernovas when they touched each other with love. It was a fanciful lie, but it made a great opera.

In her idle moments, Birha wondered whether there was a curtain through which she could slip to find the place that always stays still amid the shifting cosmi, like the eye of a storm. But the foghorn trees were calling in the rain, and she was nodding over a bowl of soup, like the old woman she was. She looked at the veins standing out on the backs of her hands and the thick-jointed fingers, and thought of the body, her universe, which was not a closed system at all. Was there any system that was completely closed? Not in this universe, at least, where the most insulated of systems must interact with its environment, if only very slowly. So was our universe completely disconnected from the others, or did they bleed into each other? Exchange something? Not energy in any form we recognized, perhaps, but something more subtle, like dreams. She wanted to know what connected the universes, she wanted to step back from it all and see the kalpa-vriksh in its entirety. But she was caught in it as surely as anyone else. A participant-observer who must deduce the grand structure of the cosmic tree from within it, who must work at it while being caught in it, a worm in a twig, a fly in amber, to feel the knowing, the learning, like a new intimacy, a love.

“All matter is wavelike in some sense,” she told the dog. “The actualizer generates waves, and through interference changes the probability amplitudes. The tiny bubble universe so formed then resonates with an existing universe with the same properties, and a doorway opens between them.”

The dog sighed, as though this was passe, which in a way it was, and wagged his tail.

A Rumination, Dozing in the Sun

One day I dreamed I was the light falling off the edge of a leaf, nice and straight, but for the lacy diffraction at the edge. At night I flew into the clouds, to the well of stars, and became a piece of the void, a bit of dark velvet stitched on to the sky. In the afternoon I am just an old woman dozing in the sun with a yellow dog sitting beside her, wondering about stars, worried about the universes. If I could be the tap of your shoe, the glance out of the corner of your eye when you see that man or this woman, if I could be the curled lip of the snarling arboril, or a mote in the eye of a dog. What would I be, if I were to be any of this?

I am myself and yet not so. I contain multitudes and am a part of something larger; I am a cell the size of a planet, swimming in the void of the night.

When They Left

After the actualizer’s discovery, it became a subject of study, a thing to explore, and ultimately an industry dealing in dreams. Streams of adventurers, dreamers, and would-be suicides, people dissatisfied with their lives, went through the actualizer to find the universe that suited them better. The actualizer became a wish-fulfillment machine, opening a path to a universe just like this one, but with your personal parameters adjusted ever so slightly, the complexity matrices shifted just so. (This was actually not possible: manipulating individual meta- world-lines was technically an unsolved problem, but tell that to the dreamers.) Among the last to go were the people who had worked with Birha, her colleagues and students. They claimed not to be deceived by the dream- merchants; their excuse was academic, but they went like so many other people into the void. The exodus left certain towns and regions thinly populated, some planets abandoned. Imagine being dissatisfied enough to want to change not towns, or planets, but entire universes! It was all Birha could do in the early days to stand there and watch the insanity until finally her dear companions were sundered from her by space, time, and whatever boundary kept one universe from another. Some people came back but they were strangers, probably from other planets in her universe. She had discovered the infinite branches of the cosmic tree, but it was not hers to claim in any way. She was the only one who wouldn’t travel its endless ways.

Who knew how long her erstwhile companions would be gone, or in what shape they’d return, if they returned? She was too old to travel, and she liked the pleasures of small things, like tinkering with the tuning on the poeticas, designing and constructing new ones, and sipping the pale tea in the morning. She liked watching the yellow dog chase firelings. But also she was a prickly old woman, conservative as they come about universes and parameters, and she liked this one just fine, thank you. She liked the world on which she lived, with the seven-year day-cycle.

No, she wouldn’t go. She was too obstinate and she disapproved of this meddling with the natural unfolding of things. Besides there was the elegance of death. The neatness of it, the way nothing’s wasted after. It seemed as though only in this universe was death real. She liked to sit on the sunny doorstep and talk to the dog about it all. Dogs, she thought, don’t need other universes; they are already perfect for the one in which they exist. She wondered if humans were refugees from some lost other branch of the Tree, which is why we were so restless. Always dissatisfied, going from planet to planet, galaxy to galaxy, branch to branch of the Cosmic Tree, and maybe rewriting our own life-histories of what-has-been. But we are not all like that; there have always been people who are like the dog, like Birha, perfectly belonging in the worlds of this universe.

A Rumination on Poeticas

A poetica consists of a series of suspended rods or wires under tension, mounted vertically on a frame. A sounding stick run by an ingenious mechanism of gears and a winding mechanism not unlike an old- fashioned clock brushes over the rods at a varying speed, forward and backward. A series of levers controls which rod or wire is struck. While this instrument can be designed to be played by an adept, it can also be fully automated by the mechanism, which is built to last. The enormous ones on public display recount the histories and great epic poems of the people, and are made of wood and stone and metal. Some kinds are designed to be played by the