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A physics professor (George Mason Univ.) and science popularizer (The Edge of the Unknown: 101 Things You Don't Know About Science and No One Else Does Either), Trefil has compiled a concise A-to-Z encyclopedia of the laws of nature, broadly defined, and how they have developed in relation to one another. His introduction itself is a gem, explaining how science progresses through observation, experimentation, and hypothesis testing. Each two- to four-page article explains a scientific concept (variously called a principle, theory, effect, or law) or a defining experiment in physics, astronomy, chemistry, geology, biology, or mathematics. Entries start with a one-sentence stateme...Log In or Sign Up to Read More