Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5

Cosmic Calendar - From the Big Bang to Today

Yazata Offline
Imagine that the ~13.8 billion years since the Big Bang was one year. The Big Bang happpened ot Midnight, January 1. Today is Midnight Dec 31.

That implies a scale where 1 month = 1.1 billion years. 1 day = 37.8 million years. 1 minute = 26,238 years.


The Earth accretes from planetesmals in August. Life (LUCA, the Last Universal Common Ancestor and whatever led up to it) is hypothesized to have appeared in September. Modern oxygenic photosynthesis appears in early protists (cyanobacteria?) in October. Resulting in the 'Oxygen Holocaust', the greatest life-caused climate-change in all of Earth's history, when the Earth's atmosphere acquired most of its oxygen and most of the then-extant single-celled prokaryotes died from having their biochemistries disrupted by oxidation. Only a few anaerobes survive today in hidden places where they can avoid the planet's air. Eukaryotes appear in november. Their appearance of these more complicated cells might be associated with the appearance of cellular respiration that can exploit oxygen, releasing more energy, making these cells more vigorous and ready for more evolving..

The first cryptic Edicarian multicellular ancestors of plants and animals, which might not have clearly diverged yet appear on December 14. The Cambrian explosion with the first chordates, molluscs, arthropods and a bewildering variety of worms suddenly appear for as-yet unknown reasons is on December 17. Plant life leaves the sea on December 20 and evolves into forests of tree-ferns. Animals (insects) leave the sea on December 21 and are soon buzzing around the ferns, the first flying animals. Amphibians follow them by dragging themselves out of the sea on December 22. The first fully land adapted reptiles December 23. The dinosaurs (the Earth's dominant land lifeform for a long period) appear (very fittingly) around December 25. Mammals belatedly appear December 26 and live in the dinosaurs' shadow. Birds evolve from dinosaurs on December 27. Flowering plants (a surprisingly late arrival) on December 28. The dinosaurs (Earth's dominant lifeform) suddenly go extinct on December 30.

On December 31, the way has been cleared for the dominance of mammals on land. The first apes appear around 6:30 in the morning. The ancestors of humans and chimps diverge much later in the day about 9:11 PM. About 8 minutes before midnight the first anatomically modern humans appear. They live a paleolithic stone age life. Then agriculture is discovered and settled village life appears. About 11 seconds before midnight, the Egyptians build the Great Pyramids. One second before midnight, Columbus discovers America.

Our modern technological civilization is just a fraction of a second old, in that cosmic year.

(Calendar from

[Image: FVTW_OEXwAA1S2l?format=jpg&name=large]
[Image: FVTW_OEXwAA1S2l?format=jpg&name=large]

Kornee Offline
And by 1 second into 'Day' 2, humanity has been supplanted by AI successors - or so futurologists predict.

Possibly Related Threads…
Thread Author Replies Views Last Post
  Research ‘Dark Big Bang’ theory: 2nd origin event explains dark matter + Lost toolbag in orbit C C 0 15 Nov 13, 2023 05:56 PM
Last Post: C C
  Article We may have found evidence of a cosmic string -- a crease in the universe C C 0 29 Sep 29, 2023 08:51 PM
Last Post: C C
  We can begin an interstellar mission today & we should + To save Earth, go to Mars C C 4 615 Jul 22, 2023 08:20 PM
Last Post: C C
  Article Do JWST’s results contradict the Big Bang? C C 0 32 Apr 22, 2023 06:08 PM
Last Post: C C
  Article Starship & new astrophysics + Was Higgs field responsible for cosmic inflation? C C 0 26 Apr 18, 2023 02:43 PM
Last Post: C C
  Article The strongest evidence for a Universe before the Big Bang C C 2 41 Mar 18, 2023 04:38 PM
Last Post: Zinjanthropos
  Be glad there's no planet between Mars & Jupiter + Dark Big Bang + Giant arcs perplex C C 0 22 Mar 7, 2023 11:24 PM
Last Post: C C
  There is no evidence for a Universe before the Big Bang (Penrose's CCC) C C 0 21 Feb 23, 2023 11:54 PM
Last Post: C C
  Mars satellite films amazing scene + Confirming the Big Bang’s 5th & final prediction C C 0 75 Oct 15, 2022 08:01 PM
Last Post: C C
  5 failed alternatives to the Big Bang theory and why they didn't work C C 0 14 Apr 18, 2022 05:53 PM
Last Post: C C

Users browsing this thread: 1 Guest(s)