13.8 billion years, squeezed into one year

The 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

JanFebMarAprMayJunJulAugSepOctNovDecNow

December

Dinosaurs die out
18152229

December 31

0:006:0012:0018:0020:11

Last minute

23:59:00:15:45Now23:59:32

Human origins

Starts Dec 31 20:11·6 million – 12,000 years ago

Read this era

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.

Today is Oct 16

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 events

Research card of the day

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”

Find this paper on Google Scholar
All 118 research cards

Read it page by page

Every wiki page keeps real sources and game fiction apart.

All 60 wiki pages

Open-source cosmos

Open-source projects on GitHub about the cosmos, life and civilization.

Cosmos

eht-imaging

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.

Life

Lenia

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.

Particle Life

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.

AlphaFold 2

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.

Civilization

Apollo 11 source code

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.

Arctic Code Vault

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.

Historical basemaps

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.

All 24 projects

Open source, maintained or historically important, and tied to a page in our wiki. Stars counted on 2026-10-15.

How far away are the civilizations of science fiction

12 civilization channels, from novels and from real hypotheses. 1 light-year = 1 real hour.

1 light-years10010K1M100M
  1. In the solar system

    Octopus civilizationRamaThe Black CloudHeptapodsSilent probeKeepers

  2. 4.24 light-years

    Alpha Centauri civilizationUnder three sunsA signal takes 4 hours 14 minutes in the game
  3. 11.9 light-years

    Tau Ceti colonyThe you that forkedA signal takes 11 hours 54 minutes in the game
  4. 27 light-years

    SweepersSinging while workingA signal takes 1 day 3 hours in the game
  5. 124 light-years

    Solaris OceanThe sea that only mimicsA signal takes 5 days 4 hours in the game
  6. 4M light-years

    AestivatorsWaiting for the universe to coolToo far: the game switches to a cosmic clock
  7. 1.8B light-years

    ExpandersA frontier coming head-onToo far: the game switches to a cosmic clock
Sci-fi bookshelf: the real science behind 46 novels

Evolve it yourself

A hard sci-fi idle game. Light up 12 eras.

  • 1,400+ nodes, each with real sources.
  • 1 light-year = 1 real hour. No faster-than-light.
  • No download. Install it on your phone and play offline.
Start evolving
Game screenshot (desktop): the Tree of the Beyond with its Energy, Spacetime, Mind, Information and Physics constellations
Game screenshot (iPad): the cosmic map, with the civilizations you met placed at their real distances
Game screenshot (phone): generators in the interstellar era and the Advance button at the bottom
Phone
Play with one thumb
Desktop
Tree of the Beyond: five constellations
iPad
Cosmic map: how far the aliens are

Sign in and your progress follows you to every screen

Free to play, pay only for time

You can finish the whole game without an account and without ads. If you want to go faster, or help us keep building, these are the two options.

Free

$0

  • All 12 eras, 12 civilization channels and 16 endings
  • No account needed; sign in to sync saves to the cloud
  • No ads; the encyclopedia and guides are open to all

Supporter Edition

$9.99one-time

  • All output ×2, permanently
  • Offline earnings cap 12 h → 24 h
  • 48 crystals right away (a 24-hour fast-forward)

Time capsules

$1.99and up

  • Skip a night$1.99
  • Skip a wall$4.99
  • Skip a week$9.99

Your first time capsule comes with double crystals

See all prices and the refund policy →