Craters, Cosmos, and Chronicles: A New Theory of Earth



The notion that the Earth might be influenced significantly by external forces has always been a rather disquieting concept for geoscientists who are trained to think in terms of uniformitarianism. The mass extinction debates of the last 15 years and the strong disagreement among advocates of impact and terrestrial extinction mechanisms are classic examples of this issue. A new book by Herbert R. Shaw makes the case that the evolution of the Earth and other planets has been significantly affected by extraterrestrial processes throughout their histories, and these processes are part of a universal system of coupled nonlinear oscillators. Shaw argues that clustered bombardment by extraterrestrial objects—along swaths that are constant over specific time periods—has been a major force for change acting in concert with planetary geodynamic forces to shape the face of our world and the other planets in the solar system.