On July 5, 1687, what landmark scientific work did Isaac Newton publish, laying out his laws of motion and universal gravitation?
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Answer: Philosophiae Naturalis Principia Mathematica
Newton's Principia Mathematica introduced the three laws of motion, the law of universal gravitation, and a mathematical derivation of Kepler's planetary laws, all in one volume. It is widely regarded as one of the most influential scientific works ever published, and it appeared on this exact date 339 years ago.