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- Dictionarynat·u·ral sci·ence/ˌnaCHər(ə)l ˈsīəns/
noun
- 1. a branch of science that deals with the physical world, e.g. physics, chemistry, geology, biology.
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noun
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Natural science is one of the branches of science concerned with the description, understanding and prediction of natural phenomena, based on empirical evidence from observation and experimentation. Mechanisms such as peer review and reproducibility of findings are used to try to ensure the validity of scientific advances. Wikipedia