Rudy was rubbing his arms and hugging his slim frame. “I c-can’t believe this is hap-p-pening. I knew I should’ve st-tayed home.”
“Keep it together, Rudy,” Jack said as he waited for Ben’s signal. “You got to stay focused.”
Suddenly the rope tugged three more times.
Jack clutched Rudy’s arm. “Okay, it’s our turn,” he said. “You go first and I’ll be right behind you.”
Rudy’s lips trembled. “I c-can’t….”
Jack shook him. “Rudy—you can do this. You’re not going to get stuck.”
Jack thrust the rope into his hands and pushed him toward the tunnel, shouting positive reinforcements like some kind of desperate life coach.
Rudy sucked in several deep breaths; then Jack pressed his head under the water and guided him to the opening. A moment later Jack followed, ducking under the surface as a thousand needles of ice pricked his flesh. He fumbled blindly for the rope, following it into utter darkness.
Jack kept his eyes squeezed tight as the sharp edges of the tunnel scraped past him, closing in tighter the farther he went. It was smaller than he had expected, and at one point he felt like he would get stuck in the middle of the passage and drown. Panic began to swell inside his chest.
He could still feel Rudy’s feet ahead of him, thrashing wildly, and at least took some comfort in knowing he wasn’t completely alone. As the chill of the water sliced through him, memories burst in his brain like flashbulbs going off. Memories of his father. A funeral without a body. The big, empty rooms of his house.
He fought back his terror and tried to concentrate on the rope. Move forward. Hand over hand. Keep moving forward.
His lungs burned.
Hand over hand.
His arms throbbed from the cold.
Hand… over hand…
And then he was out.
Jack surfaced, coughing and gasping for breath. He retrieved his flashlight from under his belt and flicked it back on, finding himself in a secondary pool within a much larger chamber. Ben was standing nearby, helping Rudy climb onto the rocky bank.
Jack waded to the side and scrambled onto the rocks. He lay there, clutching his flashlight and shuddering uncontrollably. “Wh-what do we d-do n-now?”
Ben had arranged their backpacks along the bank and was already going through them. “We need to take inventory of everything we have. I need to see what we’ve got to work with here.”
He was moving like some kind of robot, seemingly no longer affected by the cold. Probably due to his military training, Jack thought. Meanwhile Rudy was huddled on the shore, hugging his shoulders.
“I suggest you guys get changed,” Ben said. “We need to get out of our wet clothes.” He stripped off his shirt and slipped on the extra clothing he’d brought along.
Jack inched his way over and felt his own extra clothes. They were still mostly dry. He pulled off his wet clothing and slipped into his shorts and sweatshirt. It wasn’t much to keep him warm down in this cave, but it was better than staying in his wet clothes.
“What are we going to do?” he asked again.
Ben didn’t look up. “Find another way out.”
Rudy stirred at that comment. “What if there isn’t one?”
Ben shone his flashlight in Rudy’s face. “There’s always another way out.”
Rudy had brought along a pair of sweatpants and a nylon jacket in his pack. Jack tossed them over to him. “Rudy, get changed. You’re not going to do us any good if you get hypothermia.”
Rudy took his clothes and quietly began changing as Jack inspected the rest of the chamber. It was larger than he had first thought, more than a hundred feet across with a high, arched ceiling. Ben was already moving around the perimeter, shining the beam along the jagged black walls. The pool they had emerged from flowed out down a shallow trough along the floor of the chamber and disappeared again into a side tunnel. That tunnel seemed to be the only way out of the chamber.
Ben pointed his light down the passage. “Looks like we follow the stream.”
Ten minutes later, they had repacked their gear and were headed off down the side passage. Before long, Jack began to smell something. A sharp, pungent odor.
“Ugh, what is that?”
“Sulfur,” Ben said. “This whole part of the country is very geologically active. A lot of hot springs and geysers and stuff. We’re pretty close to Yellowstone.”
They walked down the tunnel for several minutes and emerged again in a chamber even larger than the previous one. Jack could tell it was warmer here than in the tunnel. And he was thankful for that, but the smell of sulfur was stronger as well.
The chamber was uneven, with several side passages and large boulders scattered throughout. Twisting white stalagmites rose from the floor along with various other rock formations, which gave the cavern a crowded and cluttered appearance. And the most curious thing was that everything seemed to be covered with a pale, glossy substance. It was spongy, fibrous, and slick, and it shrouded the entire room.
They’d just begun moving through the chamber when Ben stopped and pointed his light at the floor, where a large puddle of water frothed and bubbled. “It’s a hot spring,” he said. “Some kind of hydrothermal vent.”
Jack drew up beside him and cast his light across the steaming pool, gurgling beneath a layer of thick foam. He swept his light forward and found a second pool a few yards ahead. In fact, the more he scanned the cavern, the more he found.
He noticed Rudy crouching down, video camera in hand, filming the slimy substance covering the rocks. It looked like his fear had gone—at least temporarily—and now the biologist in him seemed to be taking over. “D’you guys see this?”
Jack turned his attention to the spongy material as well. It was a light color, appearing nearly white in the glow of their lights. “What is it?”
“It looks organic,” Rudy said. “Like some kind of bacterial slime.”
“It’s everywhere,” Ben said, shining his light across the walls. He shook his head. “I’ve heard of bacteria growing inside caves. But not like this.”
“How does anything even survive this far underground?” Jack said.
“Bacteria are very adaptable,” Rudy said. “Some strains can grow in total darkness. Even in toxic waste. Whatever this stuff is, it’s obviously adapted to the dark. And it looks like it’s adapted pretty well.”
“That’s cool,” Jack said.
Rudy nodded. “It’s pretty incredible, actually. We used to think all organisms needed sunlight to exist until we started exploring the bottom of the ocean and found complex ecosystems thousands of feet deep thriving around thermal vents where no sunlight ever reaches. So instead of the sun, these organisms get energy from the heat and chemicals coming up from those vents.”
“Makes sense.” Ben seemed to catch on. “Probably why this stuff seems to be growing more around the hot springs.”
“Exactly.” Rudy nodded. “The heat and water—maybe sulfur dioxide or hydrogen sulfide. I mean, I’m just guessing here. But this… this is incredible.” He turned to Jack with a slight smile. “This could be a whole new microorganism.”
Jack grinned back at him. “Aren’t you glad you came along now?”
Rudy continued filming, but after a minute he stopped. “Hey, guys, do me a favor and shut off your lights.”
“What?”
“Just shut off your lights for a second. I want to see something.”
They snapped their flashlights off, and darkness fell around them like a blanket. Jack could almost feel it draping over him. They stood in silence for a few moments until Rudy spoke up.
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