Synopsis Youngsters have curious and enquiring minds--and if their queries are satisfied at the right time they turn out to be smarter and sharper. This life-science book tells about the early periods of evolution of life with the onset of Archeozoic Era. The Proterozoic Era fossils are our first findings and they are supposed to be of algae or bacteria. However, the Paleozoic Era is considered as the Age of early life. The significant topics discussed,in the language the young ones can understand, are: Geological time; Fossils; Life in the Oceans; The Mesozoic era; Dinosaurs; Flying Reptiles; Archaeopteryx; The Cenozoic Era; Plant Evolution; Early Mammals; Early Man.