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Do not fill this in! <onlyinclude>{{Graphical timeline | bodyclass=nomobile | help=off | link-to=Nature timeline | scale-increment=1.000 | plot-colour=#e5cc7f | label-freq=1 | from=-13.787 | to=0 | height=50 | width=13 | annotations-width=8.8 | disable-arrow-align=true | disable-box-align=true <!--- | title=[[Chronology of the universe|Nature timeline]] ---> | title=[[Chronology of the universe|{{font|color=#ffffff|Nature timeline}}]] | bar1-from=-13.787 | bar1-to=-13.650 | bar1-text= [[Chronology of the universe#Dark Ages|<span style="color:white;">Dark Ages</span>]] | bar1-colour=#000000 | bar1-left=0 | bar1-nudge-left=-0.6 | bar1-nudge-down=-0.3 | bar2-from=-13.650 | bar2-to=-12.80 | bar2-text=[[Reionization|<span style="color:white;">Reionization</span>]] | bar2-colour=#555555 | bar2-left=0 | bar2-nudge-left=-0.5 | bar2-nudge-down=-0.5 | bar3-from=-12.800 | bar3-to=-4.54 | bar3-left=0 | bar3-colour=#666666 | bar3-text= [[Scale factor (cosmology)#Matter-dominated era|<span style="color:#99ffff;">Matter-dominated<br/>era</span>]] | bar3-nudge-left=-0.5 | bar3-nudge-down=-1.7 | bar4-from=-4.4 | bar4-text=[[Accelerating expansion of the universe|<span style="color:#99ffff;">Accelerated expansion</span>]] | bar4-colour=#7aa3cc | bar4-left=0.01 | bar4-nudge-left=0 | bar4-nudge-down=10.0 | bar5-from=-4.4 | bar5-text=[[Water#On_Earth|<span style="color:white;">Water on Earth</span>]] | bar5-colour=#7aa3cc | bar5-left=0.04 | bar5-nudge-left=-1.1 | bar5-nudge-down=7.25 | bar6-from=-4.0 | bar6-text=[[Unicellular organism|Single-celled life]] | bar6-colour=#b3d9ff | bar6-left=0.04 | bar6-nudge-left=-0.75 | bar6-nudge-down=6.4 | bar7-from=-3.500 | bar7-text=[[Evolution of photosynthesis|Photosynthesis]] | bar7-colour=#99ffff | bar7-left=0.12 | bar7-nudge-left=-0.2 | bar7-nudge-down=3.25 | bar8-from=-1.850 | bar8-text=[[Multicellular organism|Multicellular<br>life]] | bar8-colour=#b3ffdb | bar8-left=0.17 | bar8-nudge-left=0.0 | bar8-nudge-down=1.0 | bar9-from=-0.520 | bar9-to=0 | bar9-text=[[Vertebrate|<span style="color:white;">Vertebrates</span>]] | bar9-colour=#cc9900 | bar9-left=0.22 | bar9-nudge-left=0.0 | bar9-nudge-down=0.0 | note1-at=-13.787 | note1=[[Age of the universe|Earliest Universe<!---(-13.772 bya)--->]] | note1-nudge-down=0.5 | note2-at=-13.6 | note2=[[Stellar population#Population III stars|Earliest stars]]<!--- per https://www.nature.com/articles/d41586-018-02616-8 (-13.6)]] - 13.6 bya ---> | note2-nudge-down=0.05 | note3-at=-13.457 | note3=[[HD1 (galaxy)|Earliest galaxy]] <!--- [[Milky Way|Formation of Milky Way (-13.4)]] - 13.4 bya ---> | note3-nudge-up=0.1 | note4-at=-13.1 | note4={{nobr|Earliest [[quasar]] / [[Supermassive black hole|black hole]]}} | note4-nudge-up=0.3 | note5-at=-11.52 | note5=[[Omega Centauri]] | note6-at=-10.0 | note6=[[Andromeda Galaxy]] | note7-at=-8.8 | note7=[[Milky Way#Formation|Milky Way spirals]] | note8-at=-6.8 | note8=[[NGC 188|NGC 188 star cluster]] | note9-at=-6.5 | note9=[[Alpha Centauri|Alpha Centauri]] | note10-at=-6.0 | note10= <!--- [[Accelerating expansion of the universe|cosmic speed-up]] -- est time of 6.0 bya seems supported by several sources - see => [[Talk:Accelerating expansion of the universe#Error in Acceleration time?]] ---> | note11-at=-4.568 <!--- est age of the [[Solar System]] is 4.568 bya est. age of the [[Earth]] is 4.54 bya - per [[Age of the Earth]] ---> | note11=[[Early Earth|Earth]] / [[Formation and evolution of the Solar System|Solar System]] <!--- | note12-at=-4.412 | note12=[[Origin of water on Earth|Earliest water]] ---> | note13-at=-4.0 | note13=[[Earliest known life forms|Earliest known life]] | note14-at=-3.500 | note14=[[Geological history of oxygen|Earliest oxygen]] | note15-at=-2.450 | note15=[[Geological history of oxygen|Atmospheric oxygen]] <!--- see discussion at => "[[Template talk:Life timeline#Beginning of sexual reproduction]]" ---> | note16-at=-2.000 | note16=[[Sexual reproduction]] <!--- | note17-at=-1.600 | note17=[[Francevillian biota|Earliest multicellular life]] ---> | note18-at=-1.500 | note18=[[Evolution of fungi|Earliest fungi]] | note19-at=-0.800 | note19=[[Caveasphaera|Earliest animals]] / [[Evolutionary history of plants#Colonization of land|plants]] | note20-at=-0.541 | note20=[[Cambrian explosion|Cambrian explosion]] | note21-at=-0.250 | note21=[[Mammal|Earliest mammals]] | note22-at=-0.025 | note22=[[Ape|Earliest apes]] / [[Human|humans]] | note23=<span style="display:block; text-align:center;">[[Timeline of the evolutionary history of life|L<br>i<br>f<br>e]]</span> | note23-at=-1.0 | note23-nudge-left=16.4 | note23-nudge-down=2 | note23-remove-arrow=yes | caption={{align|left|([[billion years|billion years ago]])}} }}</onlyinclude><noinclude> {{documentation}}</noinclude> Summary: Please note that all contributions to Christianpedia may be edited, altered, or removed by other contributors. 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