All dates in X years ago
Earth
- -13.8 bln β Big bang
- -4.5 bln β Earth is formed
- -4.1 bln β Earth habitable for life
- -3.7 bln β First life appears
- -3.5 bln β photosynthesis
- -1.6 bln β first multi-cell organism
- -1 bln β origin of sex with single-celled eukaryotes
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- -543 mln β Eye and Cambrian explosion
Now
- 1.1 bln β earth will become not habitable for life (cc Grabby Aliens)
- 5 bln - Sun will run out of fuel (its here already for 5 bln)
Human
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- 500k β First language (via Robin Hanson)
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- 100k β Beginning of the trade (see Matt Ridley TED talk)
- 100k β our ancestors started to put valuable goods into their graves, suggesting beliefs in an afterlife. Such beliefs seem to go together with ancestor worship, and with shamans who specialize in religion. (via Robin Hanson)
- 50k β more complicated tools and arts
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