Why did the dinosaurs and two-thirds of all living species vanish from the face of the Earth sixty-five million years ago? Throughout the history of life a small number of catastrophic events have caused mass extinction, and changed the path of evolution forever. Two main theories have emerged to account for these dramatic events: asteroid impact, and massive volcanic eruptions, both leading to nuclear-like winter. In recent years, the impact hypothesis has gained precedence, but Vincent Courtillot suggests that cataclysmic volcanic activity can be linked not only to the K-T mass extinction,...
Why did the dinosaurs and two-thirds of all living species vanish from the face of the Earth sixty-five million years ago? Throughout the history of l...
From Stone to Star chronicles one of the great scientific adventures of our time. Written by the eminent geochemist Claude Allegre, it offers a fascinating glimpse into the sophisticated isotopic detective work that has established a geologic chronology of the earth and transformed our understanding of its genesis and history. In eighteenth- and nineteenth-century Europe geologists exploring the earth's surface collected fossils and hotly debated the origin of the layered and folded rocks in which they were embedded.
The development of seismology, the study of earthquakes, in...
From Stone to Star chronicles one of the great scientific adventures of our time. Written by the eminent geochemist Claude Allegre, it offer...
