From the first cavemen to light a fire to the elusive dark energy in outer space Know It All Energy explores energy in all its forms. The Know-It-All series takes a revolutionary approach to learning about the subjects you really feel you should understand but have never gotten around to studying. Each title selects a popular topic and dissects it into the 50 most significant ideas at its heart. Each idea, no matter how complex, is explained in 300 words and one picture, all digestible in under a minute.  As a phenomenon that resides everywhere and in everything, energy is best understood by example. Exploring energy shows how it cannot be created or destroyed, only transformed—and how plankton and other ancient ocean-dwelling organisms can be used to power your car. Reducing the subject to its essential areas, Know-It-All Energy charts fascinating and fundamental topics, from the nuclear fusion reactor at the heart of the sun and civilization’s discovery of our first hands-on energy source in fire almost 400,000 years ago, to the elusive dark energy which makes up most of the content of the universe. The Know It All series takes a revolutionary approach to learning about the subjects you really feel you should understand but have never gotten around to studying. Each book selects a popular topic and dissects it into the 50 most significant ideas at its heart. Each idea, no matter how complex, is explained in 300 words and one picture, all digestible in under a minute. Other titles in this series include: Know It All Anthropology, Know It All Chemistry, Know It All Classical Music, Know It All Fashion, Know It All Great Inventions, Know It All Jazz, Know It All Medicine, Know It All Shakespeare, Know It All Whiskey, Know It All Wine, Space In 30 Seconds, Sports in 30 Seconds.