Blindsight

Szpindel raised one finger. "The layers we cut through couldn't result from any metabolic process I know about. So it's not 'alive', not in the biological sense. Not that that means anything these days," he added, glancing around the belly of our beast.

"What about life inside the structure?"

"Anoxic atmosphere. Probably rules out complex multicellular life. Microbes, maybe, although if so I wish to hell they show up in the samples. But anything complex enough to think, let alone build something like that" — a wave at the image in ConSensus—"is gonna need a high-energy metabolism, and that means oxygen."

"So you think it's empty?"

"Didn't say that, did I? I know aliens are supposed to be all mysterious and everything, but I still don't see why anyone would build a city-sized wildlife refuge for anaerobic microbes."

"It's got to be a habitat for something. Why any atmosphere at all, if it's just some kind of terraforming machine?"

Szpindel pointed up at the Gang's tent. "What Susan said. Atmosphere's still under construction and we get a free ride until the owners show up."

"Free?"

"Freeish. And I know we've only seen a fraction of a fraction of what's inside. But something obviously saw us coming. It yelled at us, as I recall. If they're smart and they're hostile, why aren't they shooting?"

"Maybe they are."

"If something's hiding down the hall wrecking your robots, it's not frying them any faster than the baseline environment would do anyway."

"What you call a baseline environment might be an active counterintrusion measure. Why else would a habitat be so uninhabitable?"

Szpindel rolled his eyes. "Okay, I was wrong. We don't know enough to make a few smart guesses."

Not that we hadn't tried. Once Jack's sensor head had been irreparably fried, we'd relegated it to surface excavation; it had widened the bore in infinitesimal increments, patiently burning back the edges of our initial peephole until it measured almost a meter across. Meanwhile we'd customized Bates's grunts—shielded them against nuclear reactors and the insides of cyclotrons—and come perigee we'd thrown them at Rorschach like stones chucked into a haunted forest. Each had gone through Jack's portal, unspooling whisker-thin fiberop behind them to pass intelligence through the charged atmosphere.

They'd sent glimpses, mostly. A few extended vignettes. We'd seen Rorschach's walls move, slow lazy waves of peristalsis rippling along its gut. We'd seen treacly invaginations in progress, painstaking constrictions that would presumably, given time, seal off a passageway. Our grunts had sailed through some quarters, staggered through others where the magnetic ambience threw them off balance. They'd passed through strange throats lined with razor-thin teeth, thousands of triangular blades in parallel rows, helically twisted. They'd edged cautiously around clouds of mist sculpted into abstract fractal shapes, shifting and endlessly recursive, their charged droplets strung along a myriad converging lines of electromagnetic force.

Ultimately, every one of them had died or disappeared.

"Any way to increase the shielding?" I wondered.

Szpindel gave me a look.

"We've shielded everything except the sensor heads," Bates explained. "If we shield those we're blind."

"But visible light's harmless enough. What about purely optical li—"

"We're using optical links, commissar," Szpindel snapped. "And you may have noticed the shit's getting through anyway."

"But aren't there, you know—" I groped for the word— "bandpass filters? Something that lets visible wavelengths through, cuts out the lethal stuff on both sides?"

He snorted. "Sure. It's called an atmosphere, and if we'd brought one with us—about fifty times deeper than Earth's— it might block some of that soup down there. Course, Earth also gets a lot of help from its magnetic field, but I'm not betting my life on any EM we set up in that place."

"If we didn't keep running into these spikes," Bates said. "That's the real problem."

"Are they random?" I wondered.

Szpindel's shrug was half shiver. "I don't think anything about that place is random. But who knows? We need more data."

"Which we're not likely to get," James said, walking around the ceiling to join us, "if our drones keep shorting out."

The conditional was pure formality. We'd tried playing the odds, sacrificing drone after drone in the hope that one of them would get lucky; survival rates tailed exponentially to zero with distance from base camp. We'd tried shielding the fiberop to reduce aperture leakage; the resulting tethers were stiff and unwieldy, wrapped in so many layers of ferroceramic that we were virtually waving the bots around on the end of a stick. We'd tried cutting the tethers entirely, sending the machines out to explore on their own, squinting against the radiant blizzard and storing their findings for later download; none had returned. We'd tried everything.