<aside> 💡 All dates in X years ago

</aside>

Earth

• -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
• -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

Now

• 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)