books.google.co.nz - Australopithecines, dinosaurs, trilobites--such fossils conjure up images of lost worlds filled with vanished organisms. But in the full history of life, ancient animals, even the trilobites, form only the half-billion-year tip of a nearly four-billion-year iceberg. Andrew Knoll explores the deep history...http://books.google.co.nz/books/about/Life_on_a_Young_Planet.html?id=Lq0S-C6zMHAC&utm_source=gb-gplus-shareLife on a Young Planet
