Rocks, Fossils and Formations takes readers on a 4.6 billion year time travel adventure and explores the stories of rocks, minerals and fossils. (Illustration: Anna Madeleine Raupach, Rocks, Fossils and Formations) Rocks are continually made, destroyed and made again in the rock cycle. This is an edited extract from Rocks, Fossils and Formations: Discoveries Through Time, which takes readers on a 4.6-billion-year-long time travel adventure to explore rocks, minerals and fossils, meet ancient plants and animals, and discover how the continent of Australia was created.