The What on Earth? Wallbook of Natural History Pocket Edition tells the complete story of natural history, from the formation of the Earth to the latest breakthroughs in evolutionary science. On one side the 4.5 billion year pocket-sized timeline presents a unique illustrated guide to the past, cleverly linking subjects together from asteroids to algae. Streams of colour represent key themes, including the land, sea and sky, and provide a backdrop to all the major events of natural history. On the reverse side is a fantastic 100-question multiple choice quiz - the answers to which can all be found somewhere on the timeline. Readers will learn all about the people behind the science and the key moments in the understanding of natural history from Aristotle to the present day.