<aside> 💡 All dates in X years ago

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Life

• 13.8 bln – Big bang
• 4.5 bln – Earth is formed
• 4.1 bln – Earth habitable for life
• 3.7 bln – First life appears
• 3.5 bln – photosynthesis
• 3.5 bln – Photosynthesis
• 1.6 bln – first multi-cell organism
• 1 bln – origin of sex with single-celled eukaryotes
• 580 mln – beginning of the development of brain
• 543 mln – Eye and Cambrian explosion
• +1.1 bln – 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

• 6.5 mln – A common ancestor of homo family with chimpanzee
• 2.5 mln – The invention of tools
• 500k – First language (via Robin Hanson)
• 200k – Homo sapiens (still different skeleton, around this time also the invention of language)
• 100k – Beginning of the trade (see Matt Ridley TED talk)