1. #1The Planetconstant

   Earth's rotation was catastrophically slowed approximately 100 years ago in an event known as The Slow. The planet now rotates at roughly 5 kilometers per hour at the equator. A full day lasts approximately 330 Earth-standard days — 165 days of light, 165 days of dark.

   Day Side: Permanent sun exposure. Temperatures exceed 200°F (93°C). The thin equatorial atmosphere lowers the boiling point of water, stripping surface moisture rapidly. Lethal with prolonged exposure.

   Night Side: Permanent darkness. Temperatures at the terminator-adjacent night side drop to approximately -60°F (-51°C). Far from the terminator's influence, temperatures plunge below -109°F (-78°C), causing carbon dioxide to freeze into dry ice snow. Lethal with prolonged exposure.

   The Abyssal Plains (Ocean Basins): Crossing between former continents is the deadliest trial for surface wanderers. The continental shelves are massive cliffs dropping thousands of meters into dry ocean basins. While the descent is treacherous, the true threat is the abyssal plain itself—a vast, barren expanse completely devoid of the ruins, insects, and fungi that sustain surface life. Even with hyper-efficient metabolisms, wanderers must hoard significant food stores to survive the weeks-long or months-long crossing.

   Trans-Oceanic Tunnels: The only alternatives to traversing the open basins are pre-Slow transit tunnels spanning the ocean floor. While they bypass the cliffs and the surface storms, they are pitch-black, highly susceptible to flash-flooding from the day-side rain edge, and fiercely contested by other wanderers.

2. #2The Terminator Stripconstant

   The only habitable zone on the surface — a 200-mile (320 km) wide band running north to south where hot and cold air masses collide. It moves westward continuously as the planet rotates.

   Equatorial Zone: The strip moves at approximately 5 km/h. Survival here is vehicle-dependent. Wanderers use scavenged pre-Slow vehicles powered by solid-state batteries or micro-reactors. Gasoline is extinct.

   The 78th Parallel: The strip moves at roughly 1 km/h. The walker zone — slow enough to allow foot travel along the edge of the newly formed polar oceans.

3. #3The Terminator Storm Frontconstant

   The strip is a permanent, violent atmospheric collision — not a calm temperate band. The polar oceans drive the system. Atmospheric circulation carries moisture-laden air from the polar coastlines toward the equatorial latitudes. When this air meets the heat radiating off the day side, it rises, cools, and precipitates — feeding a continuous weather front.

   The resulting dense cloud layer moderates conditions significantly:

   • Day-Side Effect: Cloud cover drops peak temperatures from 200°F+ to approx 130°F (54°C). Still lethal with prolonged exposure, survivable at the margins.
   • Night-Side Effect: The cloud layer traps ambient heat, raising the terminator-adjacent night side floor to approx -60°F (-51°C).
   • Wind: Sustained 30–45 mph (50–70 km/h). Miserable. Walkable. Vehicles are not easily flipped.

   Weather within the strip:

   • Day-Side Edge: Torrential rainstorms. Good for water collection. Causes severe flash flooding through ruins, particularly into subterranean systems.
   • Night-Side Edge: Rain turns to sleet, freezing rain, and heavy snowfall.
   • The Middle: Dense condensation fog. Damp, loud, low visibility.
4. #4Human Biology and Epigenetic Shiftconstant

   Humans undergo an epigenetic shift when entering the surface. It isn't instant, but is completely irreversible.

   Once a human acclimates to the thin, oxygen-starved atmosphere, their bodies adapt to live off these reduced oxygen levels. If they try to return to a subterranean encampment, they will suffer from fatal oxygen toxicity.

5. #5Surface Survivalconstant

   Surface dwellers survive off the ruins of the old world, not the land itself.

   Food: Insects (beetles, roaches, larvae — reliable, nutritionally viable, universally consumed), fungi (colonize ruins extensively, require no sunlight), increasingly rare preserved pre-Slow stores, and functioning hydroponics systems — among the most valuable finds on the surface.

   Water: Condensation harvesting within the storm front, and underground reservoirs accessed through ruins. Pre-Slow water infrastructure still holds water in places.

   Scavenging Window: A stationary ruin is swallowed by the day or night side in roughly 64 hours as the strip passes over it. Flash flooding from the day-side rain edge turns subterranean ruins into drowning hazards.

6. #6Societyconstant

   Underground: The majority of surviving humanity lives in isolated, self-contained subterranean communities. Life support relies on century-old systems, hydroponics, and artificial meat production. No unified government or communication network exists. Contact between settlements is irregular and sometimes hostile.

   Surface: Wanderers — also called drifters or strip-walkers — are a minority. Harder life, shorter average lifespan, considerably more freedom. Surface communities are loose and transient, organized around movement and salvage.

   The biological barrier between underground and surface populations is permanent and known to both.

7. #7Classified Archives - The Slow

   Keys: classified, truth of the slow, weapon, 2172, Religious, Religion · Secondary: Archives, Archive, Vault

   DISCOVERABLE — RUINS AND ARCHIVES The Slow was not a natural event. A weapon was responsible — developed in secret during the ideological wars of the pre-Slow era. Its deployment in 2172 halted Earth's rotation almost instantly.

   Whether its use was a deliberate act of apocalyptic malice, a catastrophic miscalculation, or both is recorded in surviving government archives. The information was classified at the highest levels. Most of the people who knew are dead.

8. #8Classified Archives - Pre-Slow Civilization

   Keys: pre-slow civilization, Kardashev, ideological wars, religious institutions, post-scarcity, Religion, Religious · Secondary: Archives, Archive, Vault

   DISCOVERABLE — RUINS AND ARCHIVES In 2172, Earth was a post-scarcity Kardashev Type 1 civilization. Humanity had harnessed the planet's full energy output. FTL travel was deemed physically impossible. Civilization remained Earth-bound.

   The elimination of material scarcity did not produce peace. Ideology filled the vacuum. The dominant global powers were religious institutions — Christianity, Islam, and Buddhism — wielding absolute technological and military capacity. Post-scarcity removed the last pragmatic brake on ideological conflict. Wars were fought over belief, doctrine, and divine mandate.

   The weapon was a product of this environment. One or more factions deployed it believing God was on their side and the mathematics would hold. Neither assumption proved correct.

9. #9Common Rumors - The Slow

   Keys: rumor, oral history, divine judgment, man-made, legend

   DISCOVERABLE — RUMOR AND ORAL HISTORY Most survivors treat the Slow as a natural disaster or an act of divine judgment. A small number of oral traditions, passed through generations of surface wanderers and underground communities alike, hold that the Slow was man-made — the result of a war that went too far. No specifics survive in common knowledge. No faction, no weapon, no date. Just the suggestion that someone did this, and that whoever it was did not survive to answer for it.

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