Science is the earliest root and it comes from europe. The history of science is mainly studied about the development (discoveries) of science and scientific knowledge like knowledge that is based on scientific methods which are supported by adequate validation, including both the natural and social sciences (the history of the arts and humanities is termed history of scholarship, dentists,physicans, etc). Science is a body of the empirical, theoretical, humanatical, practical knowledge about the natural world, produced by scientists who emphasize the observation, explanation, and prediction of real-world phenomena.
Science in a broad sense (oldest unit) existed before the modern era and in many historical civilizations. Modern science is distinct (different and many changes) in its approach and successful in its results, so it now defines what science is in the strictest sense of the term. Science in its original sense was a word for a type of knowledge, rather than specialized word for the pursuit of such knowledge.
In particular , science is the type of knowledge which people can communicate to each other and share. For example, Mainly the knowledge about the working of natural things was gathered long before recorded history and lead to the development of complex abstract thought.
The discovery of complex calendars, techniques or solutions for making poisonous Plants edible (plant consumable), public works at National scale , such as those which harnessed the floodplain of the Yangtze with reservoirs , dam, and dikes, and buildings such as the pyramids are the example of scientific knowledge.