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In any scientific event, a topic related to Earth's gravity is hardly mentioned unless "Newton" is mentioned; That great philosopher who squared at the top of genius, and who is considered one of the most important who talked about gravity. And this book simplifies the subject of Earth's gravity, as it came from the tongue of "Newton", in a graceful style; Combines the philosophy that "Newton" used in reaching the proofs, and the simplified scientific method that the non-specialist reader u...