This traditional folding wooden ruler is printed on both sides with the five billion year history of life on Earth. On one side there is an accurate mm and cm scale along with a timeline of species and eras. Each section even has a map of the position of the continents at that time. The other side has an amazing full-colour pictorial timeline of plant and animal life in the landscape, from the formation of the planet to a modern palaeontologist!
Folding wooden ruler, two metres long, printed on both sides.
Graduated in centimetres and millimetres.
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