Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Pages: 24. Chapters: Zero-point energy, Steorn, History of perpetual motion machines, Stefan Marinov, Free energy suppression, Stanley Meyer's water fuel cell, Perepiteia, The Energy Machine of Joseph Newman, Charles Redheffer, Adams motor, John Searl, Motionless electromagnetic generator, Cox's timepiece, Magic wheel, Thomas Henry Moray, Aldo Costa, Bh skara's wheel, Simple Magnetic Overunity Toy. Excerpt: Perpetual motion describes hypothetical machines that operate or produce useful work indefinitely and, more generally, hypothetical machines that produce more work or energy than they consume, whether they might operate indefinitely or not. There is undisputed scientific consensus that perpetual motion would violate either the first law of thermodynamics, the second law of thermodynamics, or both. Machines which comply with both laws of thermodynamics but access energy from obscure sources are sometimes referred to as perpetual motion machines, although they do not meet the standard criteria for the name. Despite the fact that successful perpetual motion devices are physically impossible in terms of our current understanding of the laws of physics, the pursuit of perpetual motion remains popular. There is an undisputed scientific consensus that perpetual motion violates either the first law of thermodynamics, the second law of thermodynamics, or both. The first law of thermodynamics is essentially a statement of conservation of energy. The second law can be phrased in several different ways, the most intuitive of which is that heat flows spontaneously from hotter to colder places; the most well known statement is that entropy tends to increase, or at the least stay the same; another statement is that no heat engine (an engine which produces work while moving heat between two separate places) can be more efficient than a Carnot heat e...