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A Blessed Life; A Child's Hope; A Classic Tour; A Dance of Moths; A Gesture Life; A Head Full of Dreams Tour; A Land Imagined; A Life of Hope; A Many-Splendoured Thing
Philosophiæ Naturalis Principia Mathematica (English: The Mathematical Principles of Natural Philosophy) [1] often referred to as simply the Principia (/ p r ɪ n ˈ s ɪ p i ə, p r ɪ n ˈ k ɪ p i ə /), is a book by Isaac Newton that expounds Newton's laws of motion and his law of universal gravitation.