Mission Planet Spargus XPP09

Chapter 5: Traces of Ancient Civilization

The airlock hissed, a final, lonely sound that seemed to echo through the hollow bones of Luna Prime. Josh didn't look back. He kept his eyes on the Lunar Rover, a rugged, six-wheeled beast crouched in the shadows of the hangar. It was their only life raft now, loaded to the brim with every scrap of survival gear they could strip from the station.

"Oxygen tanks secured?" Josh asked, his voice tight within the confines of his helmet.

"Double-checked and triple-bolted," Kim replied. She was shoving the last of the medical kits into a side compartment, her movements jerky and efficient. "I packed enough antibiotics to start a civilization and enough sedatives to put one to sleep. We’re as ready as we’ll ever be."

"Which is to say, not at all," Diablo muttered. He was already in the driver’s seat, running a diagnostic on the Rover’s navigation array. "Cap, the secondary battery is showing a ten percent variance. It’s old, Josh. This thing was meant for short-range mineral scouting, not a trans-hemispheric marathon."

"Then we nurse it," Josh said, climbing into the cabin and sealing the hatch. The interior smelled of stale sweat and recycled plastic. "We don’t have the luxury of a fresh fleet, Diablo. We have a map and a ticking clock."

"And a dead world behind us," Diablo whispered, glancing at the monitor that showed the hangar door opening. Beyond the threshold lay the grey, desolate expanse of the lunar surface. Above it, the Earth hung—a bruised, silent orb. "Let’s get out of here. This place is starting to feel like a mausoleum."

The Rover lurched forward, its electric motors whining as it rolled out onto the regolith. The suspension groaned under the weight of their stolen supplies. As they pulled away, Luna Prime shrank into a tiny, metallic speck against the vastness of the Sea of Tranquility. 

The first two days were a test of silence. The Moon offered no wind, no sound, only the rhythmic vibration of the wheels grinding through powdered glass. They traveled in cycles—four hours of driving, two hours of system checks. Sleep was a luxury none of them could afford.

"The terrain is getting worse," Kim remarked on the third day. She was staring at the external feed, watching the jagged shadows of the Apennine Mountains loom closer. "The craters here are deeper, the slopes steeper. Diablo, watch the pitch."

"I see it, Kim. I’m not trying to roll us into a pit," Diablo snapped, his fingers dancing over the steering stick. "But the gravity is weird here. The Rover is pulling left. I think the axle is straining under the extra tanks."

"Hold it steady," Josh commanded. "We’re crossing into the dark side in six hours. Once we lose the Earth’s light, we’re relying entirely on the LIDAR and the rover’s spots."

"Losing the Earth," Diablo said, his voice dropping. "That’s a hell of a way to put it."

As they crossed the lunar terminator, the sapphire glow of their home finally slipped behind the horizon. The darkness that replaced it was absolute, a heavy, suffocating black that seemed to swallow the Rover’s headlights. They were truly alone now, cut off from the ghost of their past.

"Wait," Kim said suddenly, leaning toward the console. "Josh, look at the radiation sensors. They’re flatlining."

"Flatlining? You mean zero?"

"Not zero. They’re being suppressed," Kim explained, her brow furrowing. "It’s like there’s a field ahead of us. Something is dampening the cosmic background noise. We’re less than ten kilometers from the coordinates."

The Rover suddenly shuddered. A sickening clack echoed through the chassis, followed by a violent tilt to the starboard side.

"Damn it!" Diablo yelled, fighting the controls. "Rear motor’s locked! The regolith is too thick here, it’s jammed the drive assembly!"

"Kill the power!" Josh barked. 

The Rover slid to a halt, tilted at a precarious fifteen-degree angle on the edge of a shallow ravine. The silence that followed was terrifying.

"We have to go out," Josh said, reaching for his helmet. "Kim, stay on the monitors. Diablo, grab the torque wrench. We’re not dying ten klicks from the finish line."

Stepping out into the vacuum was different this time. The darkness of the far side felt ancient, thick with a weight that Luna Prime never had. Josh and Diablo crawled under the rear of the Rover, their suit lights cutting thin beams through the darkness.

"The motor housing is cracked," Diablo groaned, his breath heavy in the comms. "It’s the cold, Josh. The thermal seals couldn't take the transition. If I can't bypass the governor, this wheel is dead weight."

"Then bypass it," Josh said, his gloved hand steadying the chassis. "We don't need it pretty. We just need it to turn."

For an hour, they worked in the freezing shadow of the Rover, their fingers numbing despite the heating elements in their suits. It was a desperate dance of mechanical desperation. Diablo’s hands, usually so nimble on the flight deck, were clumsy with exhaustion, but he didn't stop. 

"Try it now," Diablo finally panted.

Back inside, the Rover hummed. The motor kicked over with a protest, but the wheel spun. 

"We’re moving," Kim breathed, a small smile breaking through her fatigue. "Coordinates in sight. Five hundred meters."

They crested a final, jagged ridge, and the Rover’s lights swept across something that made all three of them freeze. 

It wasn't a bunker. It wasn't a military outpost. 

Emerging from the grey dust was a structure that defied every rule of human architecture. It was a massive, seamless dome of dark, translucent obsidian, etched with silver geometric patterns that seemed to pulse with a faint, internal rhythm. There were no rivets, no welds, no signs of human manufacture. It looked less like a building and more like a gemstone grown from the lunar crust.

"Josh," Kim whispered, her eyes wide. "That’s not Project Aethelgard. That’s... that’s not us."

"The tablet brought us here," Josh said, his heart hammering against his ribs. "The military codes led right to this door."

"That's not a door, Cap," Diablo said, pointing at a vertical slit in the obsidian that began to glow with a soft, amber light. "That’s a mouth."

Josh steered the Rover toward the opening. The obsidian walls loomed over them, smooth and cold. As they approached, the silver etchings on the walls began to flare, casting a strange, ethereal light into the cabin of the Rover.

"Should we stop?" Kim asked, her voice trembling. "Josh, we don't know what's in there."

"We can't go back, Kim," Josh replied, his voice iron-hard. "There’s nothing left to go back to."

The Rover crossed the threshold. Behind them, a massive slab of the dark material slid upward from the ground, sealing the entrance with a soundless, airtight grace. The headlights of the Rover were suddenly redundant. The interior of the structure began to glow with a thousand tiny, crystalline lights, revealing a corridor that stretched deep into the lunar mantle.

"Air pressure rising," Kim announced, her voice filled with disbelief. "Oxygen levels... they're perfect. It’s like the room is breathing for us."

They reached a second, inner gate. This one was covered in shifting, holographic symbols that danced in the air like trapped fireflies. As Josh stepped out of the Rover, the symbols coalesced into a single, glowing circle.

Welcome, survivors, a voice echoed. It didn't come from the speakers. It didn't come from the suit comms. It vibrated directly inside their skulls, a resonant, ancient hum that felt as old as the stars themselves.

The inner door didn't slide or swing. It simply dissolved into a cloud of shimmering mist, revealing a vast, dark chamber beyond. 

"Is that the Guide?" Diablo asked, his hand hovering near his sidearm.

"Only one way to find out," Josh said.

He took a step forward into the darkness, and as his boot touched the floor, the entire chamber ignited with a blinding, golden brilliance. In the center of the room, a massive, crystalline pillar began to rotate, and a pair of eyes—vast, digital, and terrifyingly intelligent—flickered to life in the void.