| Science is a systematic enterprise that builds and organizes knowledge in the form of verifiable explanations and predictions. An older and closely related meaning still in use today is that found for example in Aristotle, whereby "science" refers to the body of reliable knowledge itself, of the type that can be logically and rationally explained.
In ancient times science was closely linked to philosophy. In the early modern era the two words, "science" and "philosophy", were sometimes used interchangeably used. In the 1600s, natural philosophy had begun to be considered separately from philosophy. Today, we refer to natural philosophy and natural science. In modern use, science is a term which more often refers to the method of pursuing knowledge not the knowledge itself. Science is restricted to those branches of study that relate to the phenomena of the material universe and their laws. Science is often closely related to mathematics as mathematics is often used to explain scientific principles and rules.
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