Origins and Extinctions

Publisher Marketing: What is the origin of the universe? How did life appear on Earth and why was much of that life destroyed at various times in Earth's history? In this book, four scientists propose answers to these questions, discussing the newest developments in some areas of current research.

Contributor Bio:  Osterbrock, Donald E Donald E. Osterbrock, Professor of Astronomy and Astrophysics at the University of California, Santa Cruz, is himself an astronomer in the Lick Observatory and directed it for eight years. He has published a book on the astrophysics of gaseous nebulae, as well as a biography of James E. Keeler, and is President-Elect of the American Astronomical Society. Contributor Bio:  Raven, Peter H Peter H. Raven is President of the Missouri Botanical Garden.