On this day
2017
Nothing recorded today; the next one is on Oct 19
Pan-STARRS discovered ʻOumuamua, the first confirmed interstellar object.
All 85 eventsThe real story of the cosmos, life and civilization, every entry with year, people and source. Then evolve it yourself.
13.8 billion years ago. In inflation theory, space stretched by at least 10²⁶ in the first 10⁻³² s, then became a scorching soup of particles.
Whole year
December
December 31
Last minute
Everything since the first humans fits in the last 3 hours 49 minutes; all of civilization takes the last 27 seconds.
The Big Bang at midnight on January 1, now at midnight on December 31. Each band is one of the 12 eras in the game.
Carl Sagan introduced the Cosmic Calendar in The Dragons of Eden (1977). Age of the universe: 13.8 billion years (Planck 2018: 13.787). One calendar second is 438 real years.
2017
Nothing recorded today; the next one is on Oct 19
Pan-STARRS discovered ʻOumuamua, the first confirmed interstellar object.
All 85 eventsWhat does “half-life” mean?
Civilization
Electromagnetic field theory
Maxwell unified electricity and magnetism and calculated that the speed of electromagnetic waves equals the speed of light: light is an electromagnetic wave.
Maxwell · Philosophical Transactions of the Royal Society · 1865
“A dynamical theory of the electromagnetic field”
Every wiki page keeps real sources and game fiction apart.
From inflation to the solar system.
From the primordial soup to the five mass extinctions.
From the first fire to Dyson spheres.
Open-source projects on GitHub about the cosmos, life and civilization.
10.1K stars
Stellarium/stellarium
Draws the real night sky live for your time and place: stars, planets and constellation lines. The web version needs no install.
5.33K stars
achael/eht-imaging
Radio interferometry imaging software. When the Event Horizon Telescope published the first black hole image in 2019, this was one of the three imaging pipelines the collaboration used.
2.38K stars
CelestiaProject/Celestia
A real-time 3D universe. Fly from Earth to other planets, stars and galaxies, with distances and orbits based on real data.
3.88K stars
Chakazul/Lenia
A continuous version of the Game of Life. A few math rules grow patterns that move, turn and split, like tiny creatures under a microscope. The online version is playable right away.
3.36K stars
hunar4321/particle-life
Particles of a few colors move by one table of who attracts and who repels whom, and they clump into cell-like structures on their own. Without the interface, the code is under a page.
14.9K stars
google-deepmind/alphafold
Predicts 3D protein structure from an amino acid sequence. Half of the 2024 Nobel Prize in Chemistry went to two of its developers, Demis Hassabis and John Jumper.
75.1K stars
chrislgarry/Apollo-11
The guidance computer program for the 1969 Moon landing, transcribed from scans of printouts held by the MIT Museum. The file that handles ignition is called BURN_BABY_BURN.
3.12K stars
github/archive-program
On 2 February 2020, GitHub wrote every active public repository of the time onto 186 reels of film and stored them in permafrost on Svalbard, Norway.
845 stars
aourednik/historical-basemaps
Borders of countries and cultural regions across world history. The earliest map is 123,000 BCE, marked with Homo erectus, Homo heidelbergensis and Neanderthals.
Open source, maintained or historically important, and tied to a page in our wiki. Stars counted on 2026-10-15.
12 civilization channels, from novels and from real hypotheses. 1 light-year = 1 real hour.
In the solar system
Octopus civilizationRamaThe Black CloudHeptapodsSilent probeKeepers
4.24 light-years
11.9 light-years
27 light-years
124 light-years
4M light-years
1.8B light-years
A hard sci-fi idle game. Light up 12 eras.



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Your first time capsule comes with double crystals
2026-10-15
Crafting bench guide: nuclear reactions add atomic numbers, chemistry conserves atoms. 51 recipes, learned once, then auto-crafted in each new universe.
2026-10-14
12 civilization channels, each with its own discovery condition: protect cephalopods on Earth, build certain things in the interstellar era, or get found out.
2026-10-14
Conditions and hints for all 16 Cosmos Era endings. Most need one node plus the end of the universe; some need other endings first; the last needs the rest.