Have you ever wondered why it seems like you are standing still - even though you are on a planet that is moving through space? Albert Einstein wondered why. Do you know what the famous equation E=mc2 means? Einstein could have explained it! Do you know why black holes exist? In this engaging book, author Paul Fleisher answers these and many more questions as he looks at the laws of relativity and quantum mechanics. With easy-to-understand concepts and experiments, readers are introduced to the basic principles of modern physics in an exciting way.