The natural sciences study the physical, nonhuman aspects of the world. As a group, the natural sciences are distinguished from the social sciences, on the one hand, as well as from the arts and humanities on the other. Natural sciences generally attempts to explain the workings of the world via natural processes rather than divine processes.
The term natural science is also used to differentiate between "science" as a discipline following the scientific method, and "science" as a field of knowledge generally, e.g. computer science or even "the science of theology".
In some contexts, the natural sciences are definied differently (sometimes called the biological sciences, involved in biological processes), and are distinguished from the physical sciences (involved in the physical and chemical laws underlying the universe).