The note at the end puts this timeline into calendar years, which is mind-blowing:

> Rescaled to a calendar year, starting with the big bang at 00:00:00 on 1 January ( ), the Sun forms on 1 September ( ), the Earth on 2 September ( ), earliest signs of life appear on 13 September ( ), earliest true mammals on 26 December ( ), and humans just 2 hours before year’s end ( ).

> For a year that starts with the earliest true mammals ( ), the dinosaurs go extinct on 17 August ( ), earliest primates appear on 9 September ( ), and humans at dawn of 25 December ( ).

> For a year that starts with the earliest humans ( ), our own species appears on 19 November ( ), the first built constructions on 8 December ( ), and agricultural farming begins at midday on 29 December ( ).