John A Long – författare

No other continent on Earth has undergone such radical environmental changes as Antarctica. In its transition from rich biodiversity to the barren, cold land of blizzards we see today, Antarctica provides a dramatic case study of how subtle changes in continental positioning can affect living communities, and how rapidly catastrophic changes can come about. Antarctica has gone from paradise to polar ice in just a few million years, a geological blink of an eye when we consider the real age of Earth.Frozen in Time presents a comprehensive overview of the fossil record of Antarctica framed within its changing environmental settings, providing a window into a past time and environment on the continent. It reconstructs Antarctica’s evolving animal and plant communities as accurately as the fossil record permits.The story of how fossils were first discovered in Antarctica is a triumph of human endeavour. It continues today with modern expeditions going out to remote sites every year to fill in more of the missing parts of the continent’s great jigsaw of life.

From kangaroos and koalas to the giant Diprotodon and bizarre "thingodontans," prehistoric mammals evolved within the changing and sometimes harsh environments of Australia. As part of Gondwana, Australia was the first landmass to be isolated from the supercontinent Pangaea. In Prehistoric Mammals of Australia and New Guinea, four respected paleontologists present a history of the development of modern mammals from the unique evolutionary environment of Australia and New Guinea. The authors describe both what is known about prehistoric Australian mammals and what can be reconstructed from the fossil evidence about their appearance and behaviors. This accessible reference work offers facts about how each mammal got its name and provides a description of how the fossil mammal resembles its modern descendants. Over 200 four-color illustrations enhance the text, which describes the age, diet, and habitat of these extinct mammals. The authors also detail how each mammal evolved and is now classified. Diagrams showing skeletal features and tooth structure and a glossary of technical terms are also included.