Historian Kenneth J. Dillon offers a Revised Version of Immanuel Velikovsky's Venus theory of the Bronze Age catastrophes, based on new evidence and interpretation ranging from Stonehenge to the myth of Archer Yi and the Ten Suns. He generalizes Venus approaches into a theory of the Outer Solar System Origin of the terrestrial planets that explains, for instance, the birth of the Pacific Basin and overcomes objections to the capture theory of the Moon. Dillon also shows how approaches of Mars set off the five great mass extinctions of prehistory. In modern history, this book contributes to a nuanced KGB theory of the Kennedy assassination and sets forth a detailed al Qaeda theory of the 2001 anthrax mailings case. This book is for historians and scientists, but also for readers who just want to know what really happened.