ABCDFGHIJKLMNOPQRSTUVWXYZAAABAC
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Year
For timeline chart
For log versionEventSource
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-13770000000-137700000000-1Universe begins
https://en.wikipedia.org/wiki/Age_of_the_universe
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-1376999999911
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-377000000199999999991
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-3770000000-377000000010000000000-1First life on earth
https://en.wikipedia.org/wiki/Earliest_known_life_forms
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-3769999999100000000011
11
-521000001132489999991
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-521000000-52100000013249000000-1First brains
https://en.wikipedia.org/wiki/Evolution_of_the_brain
13
-520999999132490000011
14
-3300001137666999991
15
-3300000-330000013766700000-1First tool use
https://www.bbc.com/news/science-environment-32804177
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-3299999137667000011
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-10001137699899991
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-10000-1000013769990000-1
Start of human civilization / neolithic revolution
https://en.wikipedia.org/wiki/Neolithic_Revolution#:~:text=The%20Neolithic%20Revolution%2C%20or%20the,an%20increasingly%20large%20population%20possible.
19
-9999137699900011
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1542137700015421
21
1543154313770001543-1
Scientific Revolution
https://en.wikipedia.org/wiki/Scientific_Revolution
22
1544137700015441
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1887137700018871
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1888188813770001888-1First computer
https://en.wikipedia.org/wiki/Computer#First_computing_device
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1889137700018891
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1944137700019441
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1945194513770001945-1
First programmable, electronic, general-purpose digital computer.
https://en.wikipedia.org/wiki/ENIAC
28
1946137700019461
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1956137700019561
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1957195713770001957-1First space travel
https://en.wikipedia.org/wiki/Human_spaceflight#History
31
1958137700019581
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2099137700020991
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2100210013770002100-1
Space expansion starts - Holden's view
(Assumption - see post)
34
2101137700021011
35
102020137701020201
36
10202110202113770102021-1
Space expansion starts - "conservative" view
(Assumption - see post)
37
102022137701020221
38
1439822099152098220991
39
1439822100143982210015209822100-1
Galaxy-wide expansion complete
See "Time to expand across galaxy" sheet
40
1439822101152098221011
41
27539999999413099999991
42
275400000002754000000041310000000-1
Arbitrary endpoint for chart
43
27540000001413100000011
44
99999999999910137699999991
45
100000000000010000000000001013770000000-1
Star formation no longer viable
https://en.wikipedia.org/wiki/Future_of_an_expanding_universe
46
100000000000010137700000001
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