The children's memories usually lasted until they were of school age, about seven or eight, and their lives then more connected with the here and now. On occasion they lasted until, or through, adulthood. The theses of Mr. Brener's two books, Our Quantum World and Reincarnation, and Something Survives, were that the explanation might lie in the theory of entanglement, one aspect of quantum physics. A brief explanation is included in Mr. Brener's Introduction to this book. It is sufficient to say here that his theses dealt with memories and emotions, purely mental attributes. But they did not encompass a very physical attribute that often accompanied the memories-namely, birthmarks and birth defects-similar to and sometimes identical to such marks and defects on the person, termed by the investigators as the prior personality, whose life the subject remembered. Brener's suggested explanation for this physical phenomenon in this instance is the science of epigenetics, something to be explained in the chapters of this volume.