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She drew her left arm forward. Drag slapped it back. She tried again. The muscles of her right shoulder screamed in outrage. Her left hand crept upstream along the surface of the tab; finally its fingers found the leading edge, hooked reflexively.

Her shoulder popped back into place. Those muscles, never satisfied, screamed all over again.

A cascade of water and foam tried to push her off. The wrangler was moving dead slow and she was barely hanging on. They'd be opening the throttle the moment they past the last channel-marker.

She edged laterally up the slope. Seawater thinned to spray; then she was clear, lying against the main hull. She split her face seal; her lung reinflated with a tired sigh.

The tab angled down at about twenty degrees. Clarke propped her back against the hull and brought her knees up, planting her feet downslope. She was wedged securely a good two meters from the water; the soles of her fins provided more than enough traction to keep her from slipping.

The outermost channel spar slid past. The vessel began picking up speed. Clarke kept one eye on the shore, the other on her nav panel. It didn't take long for the readings to change.

At last. This one was turning north. She relaxed.

The Strip scrolled slowly past in the distance, backed by the vertebral spikes of its eastern towers. At this range she could barely make out movement on shore; diffuse patches in vague motion, at best. Clouds of flightless gnats.

She thought of Amitav, the anorexic. The only one with the balls to come right out and openly hate her.

She wished him well.

Firebug

Achilles Desjardins had always found smart gels a bit creepy. People thought of them as brains in boxes, but they weren't. They didn't have the parts. Forget about the neocortex or the cerebellum—these things had nothing. No hypothalamus, no pineal gland, no sheathing of mammal over reptile over fish. No instincts. No desires. Just a porridge of cultured neurons, really: four-digit IQs that didn't give a rat's ass whether they even lived or died. Somehow they learned through operant conditioning, although they lacked the capacity either to enjoy reward or suffer punishment. Their pathways formed and dissolved with all the colorless indifference of water shaping a river delta.

But Desjardins had to admit they had their uses. Wildlife didn't stand a chance going up against a head cheese.

Not that wildlife hadn't tried, of course. But the Maelstrom ecosystems had evolved in a world of silicon and arsenide—a few hundred basic operating systems, endlessly repeated. Predictable registers and addresses. Stuff you could count on; not some slab of thinking meat in constant flux. Even if some shark did manage to scope out that architecture, it would be no farther ahead. Gels rewired themselves with each passing thought; what good is a map when the landscape won't stop moving?

That was the theory, anyway. The proof was an eye of calm, staring out from the heart of Maelstrom itself. Since the day of its birth the gels had kept it clean, a high-speed computational landscape unpolluted by worms or viruses or digital predators. One day, a long time ago, the whole network had been this clean. Perhaps one day it would be again, if the gels lived up to their potential. For the time being, though, only a select two or three million souls were allowed inside.

It was called Haven, and Achilles Desjardins practically lived there.

Now he was spinning a web across one pristine corner of his playground. Rowan's biochemical stats had already been sent to Jovellanos's station: the first thing he did was establish an update link. Then he looked over the ramparts, peeking past the shoulders of the vigilant gels into Maelstrom proper. There were things out there that had to be brought inside—carefully, though, mindful of the sparkling floors:

Tap into EOS archives. Get daily radar maps of soil moisture for the past year, if available. (A big if, these days. Desjardins had tried to load a copy of Bonny Anne from the library the week before, only to find they'd started wiping all books that hadn't been accessed for more than a two-month period. The same old mantra: storage limitations.) EM snaps of polyelectrolytes and complexing cations. Multispectrals on all major chlorophylls, xanthophylls, carotenoids: iron and soil nitrogen, too. And just to be thorough—without much hope, mind you—query the NCBI database for recent constructs with real-world viability.

Competing with conventional primary producers, Rowan had said. Meaning the conventional bugs might be dying off: do a spectral for elevated soil methane. Distribution potentially temperature-limited; infrared, crossed with albedo and windspeed. Restrict all searches to a polygon extending from the spine of the Cascades out to the coast, and from Cape Flattery down to the thirty-eighth parallel.

Draw the threads together. Squeeze the signal through the usual statistical gauntlet: path analysis, Boltzmann transforms, half-a-dozen breeds of nonlinear estimation. Discriminant functions. Hankins filters. Principal component analysis. Interferometry profiles across a range of wavelengths. Lynn-Hardy hyperniche tables. Repeat all analyses with intervariable time-lags in sequence from zero days to thirty.

Desjardins played at his panel. Abstract shapes condensed from diffuse clouds of data, winked provocatively at the corner of his eye, vanished the moment he focused on them. Fuzzy white lines from a dozen directions interwove, colored, took on intricate fractal patterns—

But no. This mosaic had a P value greater than 0.25; that one violated assumptions of homoscedasticity. The little one in the corner drove the Hessians fucking crazy. One flawed thread, barely visible, and the whole carpet unraveled. Tear it down, bleach out the transforms, start from scratch—

Wait a minute.

Correlation coefficient of -0.873. What was that all about?

Temperature. Temperature went up when chlorophyll went down.

Why the hell didn't I see that before? Oh, there. A time-lag. What the…

What the

A soft chime in his ear: "Hey Killjoy. I've got something really strange here."

"Me too," Desjardins replied.

* * *

Jovellanos's office was just down the hall; it still took her a few minutes to show up at his door. The caffeine spike clenched in her hand told him why.

"You should get more sleep," he remarked. "You won't need so many chemicals."

She raised an eyebrow. "This from the man with half his bloodstream registered in the patent office." Jovellanos hadn't had her shots yet. She didn't need them in her current position, but she was too good at her job to stay where she was much longer. Desjardins looked forward to the day when her righteous stance on the Sanctity of Free Will went head-to-head against the legal prerequisites for promotion. She'd probably take one look at the list of perks and the new salary, and cave.

He had, anyway.

He spun his chair back to the console and brought the correlation matrix up on the display. "Look at this. Chloroes go down, soil temperature goes up."

"Huge P-value," Jovellanos said.

"Small sample size. That's not the point: look at the time-lag."

She leaned forward. "Those are awfully big confidence limits."

"The lag's not consistent. Sometimes it takes a couple of days for the temp to rise, sometimes a few weeks."