This incredible poster tells the history of our planet through a timeline of geological ages. Details on how the earth has changed over time are also given, with descriptions of the four main geological periods (Precambrian, Palaeozoic, Mesozoic and Cenozoic) and the evolution of plants and animals. Creatures and living things are divided into the categories: eubacteria; cyanobacteria; archea; eukaryotes; fungi; invertebrates; plants; chordates; mammals. The development of each category is illustrated by an annotated strip of colour, changing thickness to indicated dominance.