The 6th Extinction (Sigma Force 10)

“I finished a full soils analysis from the dead zone. It’s not just the vegetation and wildlife that’s being killed. To a depth of two feet, I found the samples to be devoid of any life. Bacteria, spores, insects, worms. All dead. The ground had been essentially sterilized.”

Parson let his shock show. “That level of pathogenicity . . . it’s unheard of.”

Lisa pictured those dark hills, imagining the same shadow penetrating deep underground, leaving no life in its wake as it slowly rolled across the landscape. She had also heard about the inclement weather descending upon the Mono Lake Basin. It was a recipe for an ecological disaster of incalculable proportions.

A bacteriologist spoke up next. “Speaking of pathogenicity, our team has run through a gamut of liquid disinfection traps, seeking some way to sterilize the samples from the field. We’ve tried extremes of alkalinity and acidity. Lye, various bleaches, et cetera. But the samples remain infectious.”

“What about extreme heat?” Lisa asked, remembering Painter’s belief that they might have to scorch those hills to stop the blight from spreading.

The researcher shrugged. “We thought we initially had some success. We burned an infected plant to a fine ash—and at first it seemed to work, but after it cooled, it remained just as infectious. We believe the heat merely put the microbe into some type of spore or cyst-like state.”

“Maybe it takes something hotter,” Lisa said.

“Possibly. But how hot is hot enough? We’ve discussed a nuclear level of heat. But if the fires of an atomic bomb don’t kill it, the blast could scatter and aerosolize the agent for hundreds of miles.”

That was definitely not an option.

“Keep searching,” Parson encouraged.

“It would help if we knew what we were fighting,” the bacteriologist finished, which earned him many nods from his fellow scientists.

Lisa explained her own findings, confirming that they were likely dealing with something viral in nature.

“But it’s exceedingly small,” she said, “smaller than any known virus. We know Dr. Hess was experimenting with extremophiles from around the world, organisms that could thrive in acidic or alkaline environments, even some that could survive in the molten heat found in volcanic vents.”

She looked pointedly at the bacteriologist. “Then to make matters worse, we know Hess was also delving into the very fringes of synthetic biology. His project—Neogenesis—sought to genetically manipulate the DNA of extremophiles in an attempt to help endangered species, to make them hardier and more resistant to environmental changes. In this quest, who knows what monster he created down there?”

Dr. Edmund Dent, a CDC virologist, stood up. “I believe we’ve caught a glimpse of that monster. Under the newly installed electron microscope.”

All eyes turned to him.

“At first we thought it was a technical glitch. What we found seemed too small—unimaginably small—but if Dr. Cummings’s assessment concerning the size of the infectious particle is accurate, then perhaps it’s not a mistake.” Dent glanced to her. “If you’d be willing to join us . . .”

“Of course. I think we should also bring in a geneticist and bioengineer. Just in case, we—”

A loud klaxon sounded, drawing all their gazes to the window. A blue light flashed in the darkness, spinning in time with the alarm. It came from the patient containment unit.

Panic drew Lisa to her feet.

12

April 29, 3:05 P.M. GMT

Brunt Ice Shelf, Antarctica

“Hold on tight!” the pilot called out.

The small Twin Otter plane bucked like an untamed stallion as it crossed high over the iceberg-choked Weddell Sea. The winds worsened as they neared the coast.

“These bastarding katabatics are kicking me in the arse!” the pilot explained. “If you’re feeling lurgy, I got airsickness bags back there if you’re going to chunder. Don’t go messin’ my girl up.”

Gray kept a firm hold on the strap webbing of his jump seat. He was belted in tightly along one side of the cabin. At the back, crates of gear and supplies rattled and creaked. He was normally not prone to motion sickness, but this roller coaster of a flight was testing even his mettle.

Jason sat across the cabin, his head lolling, half asleep, plainly unfazed by the turbulence. Apparently he’d had plenty of experience with this storm-swept continent. Instead, the kid seemed more afflicted by the twenty-four hours of long flights to get to the south end of the world.

At least this was their last leg.

Earlier today, just after sunrise—which was noon this side of the world, the beginning of their dark winter—they had flown from the Falkland Islands to the Antarctic Peninsula, landing atop a rocky promontory on Adelaide Island, where the British maintained Rothera Station. That flight had been aboard a large, bright red Dash 7 aircraft, with British Antarctic Survey emblazoned on its side. At Rothera, they had switched to this smaller Twin Otter, similarly painted, and set off across the Weddell Sea toward the Brunt Ice Shelf: a floating hundred-meter-thick sheet that hugged the far coastline in a region of East Antarctica called Coats Land.

As they made their approach, the aircraft’s twin props chopped into the polar airstream—called the katabatic winds—which rolled down from the higher elevations of the inner mountain ranges to roar out to sea.

Their pilot was an older UK airman named Barstow, who clearly had had plenty of arctic experience. He continued his ongoing commentary and tour. “Did you know the name of these winds comes from the Greek word katabaino, which means to go down?”

“Let’s hope that doesn’t happen to us,” a voice grumbled behind him.

Joe Kowalski huddled in the back. His large frame was folded nearly in half to fit into the cramped space. He looked like a shaven-headed gorilla crammed into a sewer pipe. He kept his head ducked from the low roof—not that he hadn’t hit it a few times during the bumpy ride over the Weddell Sea.

Kat had sent the big man along on this mission as additional support and muscle, while voicing another reason, too. Get him out of here. After his breakup with Elizabeth Polk, all he does is mope around these halls.

Gray wondered how Kat could tell the difference. Kowalski was never a beam of sunshine, even on his best days.

Still, Gray hadn’t complained. The guy might not look or sound it, but the former Navy sailor had his own skill set, which mostly involved things that go boom. As Sigma’s demolitions expert, he had proved invaluable in the past. Plus his cantankerous attitude sort of grew on you, like mold on bread. Once you got used to him, he was all right.