Its all about Physics.

  Natural philosophy : Introduction: The study of physics, or the study of nature and the physical universe, is known as natural philosophy or philosophy of nature (from the Latin philosophia naturalis). Before the advent of modern science, it ruled.   Natural philosophy Natural philosophy, a broad phrase that included botany, zoology, anthropology, and chemistry in addition to what we now call physics, was the popular title for the study of physics (nature) from the ancient world (at least since Aristotle) until the 19th century. The 19th century saw the development of various branches of science, including astronomy, biology, and physics, giving the concept of science its present form. Science-focused organisations and communities were established.The phrase "natural philosophy" was first used in Isaac Newton's work Philosophiae Naturalis Principia Mathematica (1687), which is now known in English as Mathematical Principles of Natural Philosophy. Treatise on Natural Phi...