The 20th century marked a time in physics that raised more questions than answers. Although physicists expected to spend this century refining their previous theories and making the critical measurements needed to complete the tapestry of their science, the 20th century was spent redefining almost everything people thought they understood about matter and energy, space and time, and waves and particles. Documenting the exciting depth of this field, "Physics: Decade by Decade" explores the progression of this science as it developed throughout the 20th century. Readers will see separate threads of physics developing and coming together in surprising ways - and realize the value of adopting a physicist's way of approaching the universe and thinking in terms of unification.