The end of the 19th and beginning of the 20th century marked a new era in the study of physics. It seemed as though everything that was thought to be known was being called into question. This book attempts to summarize some of the most critical discoveries and theories in the decade or so leading up to its publication in a relatively non-technical fashion, and provides insight into our understanding of the world in the midst of the modern physics revolution. - Summary by Patrick Wells Proof Listening by Linny and TriciaG