timeline

 HADEAN EON (4.5 bya)

• Solar system forms from cosmic dust.
• Intelligent life develops on the lost planet Nibiru, beyond Neptune.
• Annunaki civilisation flourishes, begins to colonise gas giants.
• Presence of life attracts extrasolar predator Tiamat.
• Oort cloud infested by Tiamat. Hadean War begins.
• Annunaki scientists relocate Nibiru to inner ring of solar system.
• Nibiru collides with Earth. Moon formed. Collapse of Annunaki civilisation.
• Tiamat slain by Marduk, last king of the Annunaki. End of Hadean War.
• Late Heavy Bombardment caused by distintegration of Tiamat's corpse.
• Most surviving Annunaki retreat to lunar tomb-cities, enter cultural stasis.
• Tiamatic material, seeded by meteors across inner system, evolves into first prokaryotes.

ARCHAEAN EON (4 bya)

• Earth cools below the boiling point of water, allowing oceans to form.
• Microbial mats populate the slimy shores of Vaalbara, the first continent, and begin to develop rudimentary self-awareness.
• Great age of stromatolithic architecture. Psychic reefs and dreaming mountains play host to anaerobic shoggoth ecosystem.
• Vaalbara fuses into one vast prokaryotic brain.
• Quasi-human time refugees from the Anthropocene terraform and colonise Noachian Mars.
• Martian seas run dry. 
• Attempts to steal Earth's water lead to catastrophic war with Vaalbara.
• Empire of Hungry Stone conquers inner system. 
• Shoggoth legions begin the process of converting all matter into cognition slime.
• Last of the Q-men infect Earth with blue-green bacteria bred in Tharsis plague pools. 
• Vaalbara destroyed by Oxygen Holocaust.

PROTEROZOIC EON (2.5 bya)

• First eukaryotes appear.
• Chthonians evolve from subterranean protozoa.
• Q-men descendants colonise newly-oxygenated Earth.
• Surviving shoggoths retreat to bottom of sea, which remains anoxic.
• Q-men cope with Huronian glaciation by evolving into photosynthetic yetis.
• Frozen earth converted into temple. Ice mandalas etched on moons of Saturn.
• Yetis pass a billion years in silent meditation upon the beauty of barren continents, then peacefully go extinct, except for handful of sorcerors who mummify themselves to await the dawn of a new eon.

PALAEOZOIC ERA (541 mya)

• Emergence of complex multicellular life.
• Elder blastoids populate Gondwana's warm, shallow seas.
• Arrival of the Great Race, emigrants from a hostile future who project their consciousness into the bodies of hallucigenian worms.
• Blastoid explorers make contact with the last shoggoths, lurking in sulphuric vents.
• Foundation of Pnakotus, the basalt library-city, where worm-scholars write the history of the universe by kidnapping witnesses from across time.
• Mi-go arrive from the Oort cloud, having evolved from cosmic parasites attracted to Tiamat's corpse. They colonise mountaintops and begin to experiment on fish.
• Shoggoth army conquers Pnakotus, unleashing the contents of its time dungeons.
• Early amphibians haunt the clubmoss forests, worshipping the god Pan in the form of a horned centipede.
• P-T extinction event caused by blastoid-mi-go war.

MESOZOIC ERA (252 mya)

• Amphibians evolve into serpent men.
• Serpent men tame dinosaurs, build solar-powered cities in the desert.
• Kardashev Type I civilisation developed.
• Slave race of Q-men cloned from yeti gene banks.
• Dyson swarm constructed around sun.
• Kardashev Type II civilisation developed.
• First contact made with Nordics and Zeta Reticulans.
• Serpent men explore the galactic core and discover the singularity Azathoth.
• Earth abandoned to breed new intelligent species for Azathoth's consumption.
• Kardashev Type III civilisation developed.
• Emancipated Q-men establish dinosaur kingdoms, start work on spaceflight.
• Improperly maintained Dyson swarm component falls into erratic orbit and causes Chicxulub impact.

CENOZOIC ERA (66 mya)

• Last dinosaurs preserved by chthonians in Hollow Earth.
• Reanimated yeti sorceror founds Hyperborean empire.
• Maps of past and future discovered in Pnakotic ruins, providing hard evidence of causal determinism.
• Hyperborea declines into nihilism and sexual decadence.
• Puritan cult of Tsathoggua sparks civil war.
• Surviving Hyperboreans enter Hollow Earth, adapting to subterranean life.
• Early whales develop collective dreaming capacity, begin to sculpt oneiric dimensions once occupied by Vaalbaran consciousness.
• Continents settle into their current positions.
• Atlantis and Lemuria grown from crystal seeds, colonised by primitive Q-men.
• Zeta Reticulans make contact with Atlanteans, trading technology for a promise to guard their cetacean ancestors.
• Earliest hominids evolve in Africa.
• Multiple intelligent species attempt to guide human evolution, leading to the Ape Wars.
• Atlantis and Lemuria destroyed. Survivors flee to the Americas.
• Human civilisation develops in fertile river valleys, subtly guided by serpent men.
• Rings of Saturn constructed as means of social control.
• The present day.