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Universe Timeline 4.8

Compresses the history of the universe into a single year.
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Date Day of week Time Event
1/1/28 Saturday The Big Bang. Beginning of the space and time.
1/4/28 Tuesday Methuselah star. Oldest known star in the universe.
1/6/28 - 1/24/28 Thursday - Monday Reionization era. Early stars start ionizing interstellar gas.
1/8/28 Saturday First black holes form
1/14/28 Friday Mass star formation. Universe starts to heat once again.
1/16/28 Sunday First galaxies form
1/17/28 Monday GRB 090423. Oldest gamma ray burst ever observed.
1/22/28 Saturday Hubble ultra deep field
1/26/28 Wednesday Quasar CFHQS J2329-0301. Oldest known quasar.
1/30/28 Sunday PST B1620-26. Oldest known exoplanet.
2/1/28 Tuesday Milky Way forms
2/15/28 Tuesday GRB 140419A supernova. Second oldest gamma ray burst.
2/25/28 Friday BX442 galaxy. Oldest known spiral galaxy.
3/1/28 Wednesday Kapteyn b. Oldest known exoplanet lying within the habitable zone.
3/4/28 Saturday Milky Way's cosmic halo forms
3/15/28 Wednesday Star formation rate peaks. Universe starts to cool Temperature averages around 13000 K.
3/28/28 Tuesday Oldest population I stars. First stars abundant in metals.
3/31/28 Friday Universe becomes habitable. First life-friendly star systems emerge.
4/13/28 Thursday JKCS 041. Oldest galactic cluster.
4/18/28 Tuesday Universe reaches 1/3 of its present diameter
4/21/28 Friday Milky Way star formation rate stabilizes
4/28/28 Friday Barnard's star forms. Oldest close solar neighbor.
5/7/28 Sunday Oldest known evidence for dark energy
5/12/28 Friday Milky Way's thin disk starts to form
5/20/28 Saturday Lalande 21185
5/23/28 Tuesday Lacaille 9352
6/2/28 Friday Milky Way star formation rate begins to decline
6/8/28 Thursday Mizar forms
6/16/28 Friday GRB 080319B. Most powerful gamma ray burst ever observed by humans.
6/16/28 Friday Arcturus forms. 4th brightest star in the night sky.
6/26/28 Monday Universe cools below 5 K
6/29/28 Thursday Growth of large galaxies slows
7/2/28 Sunday 1/2 the age of the Universe
7/4/28 Tuesday Alpha Centauri forms. Closest star system to the Sun.
7/7/28 Friday Alnitak forms. Left star of the Orion's Belt.
7/12/28 Wednesday Milky Way starts spiralizing
7/15/28 Saturday Age of an average earth-like planet
7/20/28 Thursday 61 Cygni forms
7/25/28 Tuesday Dark energy overtakes gravity. Universe's expansion rate starts to accelerate.
7/31/28 Monday Tau Ceti forms
8/8/28 Tuesday Solar nebula starts collapsing
8/8/28 Tuesday Milky way becomes a spiral galaxy
8/16/28 Wednesday Gliese 570 forms
8/25/28 Friday Proxima Centauri forms. Closest star to the Sun.
8/29/28 Tuesday SN 2005ap supernova. Brightest supernova ever observed.
9/1/28 Friday The Sun forms
9/2/28 Saturday Proto-earth forms. Planets, asteroids and comets form from the Sun's protoplanetary disk.
9/2/28 Saturday Formation of the Moon. Theia impacts Earth, the Moon forms from the coalesced debris.
9/6/28 Wednesday Oceans form on Earth. Asteroids bring water to Earth.
9/6/28 Wednesday First known minerals. Zircons form at Jack Hills, Australia.
9/10/28 Sunday Mintaka forms. Right star of the Orion's Belt.
9/11/28 - 9/19/28 Monday - Tuesday Life emerges on Earth
9/13/28 - 9/22/28 Wednesday - Friday Late Heavy Bombardment
9/14/28 Thursday Earliest known rock. (Aggregate of minerals).
9/16/28 Saturday Greenstone rock belt
9/22/28 Friday Oldest banded iron formation
9/27/28 Wednesday Vaalbara supercontinent emerges
9/30/28 Saturday Last universal ancestor. Split between bacteria and archaea.
9/30/28 Saturday Cyanobacteria fossils. Warrawoona, oldest fossil evidence of life on Earth.
10/5/28 Thursday Compressional tectonics
10/6/28 Friday Barberton event. One of the largest impacts ever, left a 300 mi / 480 km crater.
10/8/28 Sunday Ur supercontinent forms
10/8/28 Sunday Anoxygenic photosynthesis developed by bacteria
10/10/28 Tuesday First land bacteria
10/13/28 Friday Cyanobacteria develop true photosynthesis. Life begins to produce oxygen.
10/16/28 Monday Zeta Reticuli forms
10/16/28 Monday Kenorland supercontinent emerges
10/16/28 Monday Tides decline below 1000 ft / 300 m
10/18/28 Wednesday Vaalbara supercontinent breaks up
10/21/28 Saturday Major komatiite eruption
10/21/28 Saturday First eukaryotes emerge. Early estimate.
10/24/28 Tuesday Oldest known giant carbonate platform
10/25/28 Wednesday Zeta Puppis forms
10/26/28 Thursday Great Oxygenation event. Bacterially produced oxygen starts to accumulate in the atmosphere.
10/26/28 Thursday Movement of the tectonic plates commences
10/29/28 Sunday Suavjarvi impact event left oldest still recognizable crater
10/29/28 - 11/4/28 Sunday - Saturday Huronian glaciation. First snowball earth period.
11/1/28 Wednesday Continental red beds form
11/3/28 Friday Atmospheric oxygen level surpasses one percent
11/3/28 Friday Ozone layer forms
11/6/28 Monday Earliest known eukaryote fossils (acritarchs)
11/6/28 Monday Earliest multicellular life. Francevillian Group Fossil.
11/8/28 Wednesday Vredefort impact event. One of the largest impacts ever left a 190 mi/ 300 km crater.
11/11/28 Saturday Atmospheric oxygen level surpasses 15 percent
11/11/28 Saturday Natural nuclear reactor forms in Oklo, Gabon
11/12/28 Sunday Sudbury impact, event left a 160 mi / 260 km crater
11/14/28 Tuesday Supercontinent Columbia forms
11/15/28 Wednesday Vishnu Basement Rocks. Oldest rocks in the Grand Canyon.
11/16/28 Thursday Oldest sand dune ergs
11/19/28 Sunday Mitochondria assimilate into eukaryotic cells
11/22/28 Wednesday Supercontinent Columbia breaks up
11/23/28 Thursday Geologic platform covers expand
11/24/28 Friday Population of stromatolites rapidly rises
11/25/28 Saturday Procyon forms. Brightest star in Canis Minor.
11/27/28 Monday Greenville orogeny starts
11/30/28 Thursday Supercontinent Rodinia forms
11/30/28 Thursday Bangiomorpha pubescens. First sexually reproducing organism.
12/1/28 Friday Population explosion of eukaryotes
12/2/28 Saturday Earliest flagellate protists
12/9/28 Saturday Population of stromatolites starts to decline
12/10/28 Sunday Protista population explodes
12/11/28 Monday Kaigas glaciation. Snowball earth period.
12/12/28 Tuesday Supercontinent Rodinia breaks apart
12/12/28 - 12/14/28 Tuesday - Thursday Sturtian glaciation. Snowball earth period.
12/14/28 Thursday Marinoan glaciation. Snowball earth period.
12/16/28 Saturday Fossilized worm impressions in China
12/16/28 Saturday Avalon explosion. Ediacaran fauna emerges.
12/17/28 Sunday Cambrian explosion. Exponential diversification of life, most major animal phyla appear.
12/18/28 Monday First trilobites
12/20/28 Wednesday 1:33 AM Plants and arthropods colonize the land
12/20/28 Wednesday 4:44 AM Ordovician extinction event. 60% of all species go extinct.
12/20/28 Wednesday 8:39 PM First air-breathing animals
12/21/28 Thursday 12:34 PM First tetrapods
12/21/28 Thursday 10:07 PM First tree-like plants
12/22/28 Friday 4:29 AM Late Devonian extinction. 70% of all species go extinct.
12/23/28 Saturday 5:56 AM First amniotes
12/23/28 Saturday 12:18 PM First reptiles
12/23/28 Saturday 9:51 PM Atmospheric oxygen level peaks at 35%. Arthropods grow into unprecedented sizes.
12/24/28 Sunday 1:02 AM Pangaea forms. Last supercontinent.
12/25/28 Monday 8:13 AM Permian extinction event. Largest extinction event in history, 90-96% of all species go extinct.
12/25/28 Monday 8:52 AM Sirius forms . Brightest star in the night sky.
12/25/28 Monday 8:57 PM First dinosaurs
12/26/28 Tuesday 12:46 AM First mammals
12/26/28 Tuesday 4:03 PM Triassic extinction event. 75% of all species go extinct.
12/26/28 Tuesday 11:03 PM First giant sauropods
12/27/28 Wednesday 5:25 AM Pangaea splits into Laurasia and Gondwana
12/27/28 Wednesday 7:58 AM First stegosaurs
12/27/28 Wednesday 9:20 PM First birds
12/28/28 Thursday 3:42 AM Madagascar splits from Africa
12/28/28 Thursday 1:15 PM First flowering plants
12/28/28 Thursday 1:15 PM Laurasia and Gondwana begin to drift apart
12/29/28 Friday 4:31 AM Spinosaurus evolves. Largest of all carnivorous dinosaurs.
12/29/28 Friday 8:20 AM First bees
12/29/28 Friday 2:42 PM Indian subcontinent splits from Gondwana
12/29/28 Friday 9:04 PM Australia splits from Antarctica
12/30/28 Saturday 4:42 AM Tyrannosaurus rex evolves
12/30/28 Saturday 5:59 AM Cretaceous extinction event. 75% of all species vanish.
12/30/28 Saturday 9:48 AM First primates evolve
12/30/28 Saturday 12:59 PM First modern birds
12/30/28 Saturday 4:10 PM Indian subcontinent collides with Asia. Tiber and Himalayas start to rise.
12/30/28 Saturday 6:05 PM Whales return to the water
12/30/28 Saturday 10:32 PM Antarctic ice cap begins to grow
12/31/28 Sunday 1:43 AM Grasslands become widespread
12/31/28 Sunday 4:54 AM South America separates from Antarctica
12/31/28 Sunday 7:27 AM First elephants. Eritreum melakeghebrekristosi.
12/31/28 Sunday 12:32 PM Divergence of great apes and lesser apes
12/31/28 Sunday 2:27 PM First bovids
12/31/28 Sunday 4:59 PM First large horses
12/31/28 Sunday 6:54 PM Rigel forms. Brightest star in Orion.
12/31/28 Sunday 7:13 PM Betelgeuse forms. Second brightest star in Orion.
12/31/28 Sunday 8:10 PM Last common ancestor humans and chimpanzees
12/31/28 Sunday 8:12 PM - 8:36 PM Messinian salinity crisis. Strait of Gibraltar closes tight, Mediterranean Sea dries out.
12/31/28 Sunday 9:27 PM Australopithecus evolves
12/31/28 Sunday 10:05 PM Great American Interchange. Isthmus of Panama rises, North and South America join, extensive fauna exchange follows.
12/31/28 Sunday 10:24 PM Current ice age begins
12/31/28 Sunday 10:35 PM First members of the genus Homo appear
12/31/28 Sunday 11:02 PM First controlled use of fire by Homo erectus
12/31/28 Sunday 11:30 PM Last reversal of the Earth's magnetic field
12/31/28 Sunday 11:35 PM Yellowstone Caldera erupts
12/31/28 Sunday 11:40 PM Earliest human engravings. Zig-zag patterns on shells in Java.
12/31/28 Sunday 11:48 PM Earliest instances of burial
12/31/28 Sunday 11:50 PM Neanderthals evolve
12/31/28 Sunday 11:52 PM Anatomically modern humans appear in Africa
12/31/28 Sunday 11:56 PM Humans begin migrating out of Africa
12/31/28 Sunday 11:57 PM Toba supervolcanic eruption. Human population falls to 10,000.
12/31/28 Sunday 11:58 PM 23:58:39 Neanderthals go extinct
12/31/28 Sunday 11:59 PM 23:59:25 First domesticated dogs
12/31/28 Sunday 11:59 PM 23:59:39 Beginning of agriculture
12/31/28 Sunday 11:59 PM 23:59:46 Wheel invented
12/31/28 Sunday 11:59 PM 23:59:48 Writing invented
12/31/28 Sunday 11:59 PM 23:59:49 Great Pyramid
12/31/28 Sunday 11:59 PM 23:59:52 Iron Age begins
12/31/28 Sunday 11:59 PM 23:59:55 Julius Caesar
12/31/28 Sunday 11:59 PM 23:59:58 Galileo Galilei
12/31/28 Sunday 11:59 PM 23:59:59 Charles Darwin