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Nature (also called the material world, the material universe, the natural world, and the natural universe) is all matter and energy, especially in its essential form. Nature is the subject of scientific study, and the history of the concept is linked to the history of science. The English word derives from a Latin term, natura, which was in turn a translation of a Greek term, physis (φύσις). Natura is related to the Latin words relating to "birth", while physis relates to Greek words relating to "growth". In scale, "nature" includes everything from the universal to the subatomic. This includes all things animal, plant, and mineral; all natural resources and events (hurricanes, tornadoes, earthquakes). It also includes the behaviour of living animals, and processes associated with inanimate objects - the "way" that things change. (Compare logos, tao, and dharma.)
Nature outside Earth and its atmosphere
Life, the characteristics and behaviors of organisms, how species and individuals come into existence, and the interactions they have with each other and with their environment are all in the natural science of biology. The branch of biology that focuses on the relationships of organisms and their environment is the science of ecology.
Matter and force
Everything relating to the planet Earth is a part of earth science.
In philosophy, the view that the material world of atoms, animals, gravity, stars, wind, microbes, etc., actually exist independently of our observations of them is termed realism; the opposing view is called idealism. A classic philosophical problem is about what caused the material world, or is it eternally repeating in some way. If the material univere is caused, then is there some immaterial or incorporeal First Cause or Prime Mover? What exists beyond the material realm has been a fascinating question to many famous philosophers for over two centuries. What exists eternally, without change, is also a question asked by Socrates, Plato, and other philosophers. The material world has long been observed to be in constant change and flux since pre-Socratic times. This observation of constant change has led to Plato's claims about the eternal forms that are the blueprints or formal causes for all that materially exists.
The natural and the artificial
A distinction is often drawn between the "natural" and the "artificial" (="man-made"). Can such a distinction be justified? One approach is to exclude mind from the realm of the natural; another is to exclude not only mind, but also humans and their influence. In either case, the boundary between the natural and the artificial is a difficult one to draw (see mind-body problem). Some people believe that the problem is best avoided by saying that everything is natural, but that does little to clarify the concept of the "artificial". In any event, ambiguities about the distinction between the natural and the artificial animate much of art, literature and philosophy. In the 18th century, automaton provided the basis for Descartes' mechanism theory of the organism.
Another approach is to distinguish natural processes and artificial (man-made) processes. In this viewpoint, a process is deemed to occur either at the behest of man, or not. For example, flipping a light switch might illuminate a room, or perhaps a sunrise might illuminate that room. In this viewpoint, the sunrise would be termed a natural process; the decision of a human being to flip the light switch would be termed an artificial illumination, in contrast. In this viewpoint, artifice (art or literature) is clearly the result of willful human action; furthermore, the act of stating a philosophical position could also be a willful action (and hence at the behest of man), whether or not the content of the philosophy were to be about science. Natural processes, especially as used by organisms, may also be known as wildness.
The distinction between what is natural and artificial was initially important, as far as we know, to the ancient Greeks. Perhaps their main interest was in distinguishing good aims from ones that have been distorted. In modern times, such philosophers as David Hume and John Stuart Mill have criticised attempts to give any moral importance to the distinction.
"The scientist does not study nature because it is useful; he studies it because he delights in it, and he delights in it because it is beautiful.
If nature were not beautiful, it would not be worth knowing, and if nature were not worth knowing, life would not be worth living. Of course I do not here speak of that beauty that strikes the senses, the beauty of quality and appearances; not that I undervalue such beauty, far from it, but it has nothing to do with science; I mean that profounder beauty which comes from the harmonious order of the parts, and which a pure intelligence can grasp."
A common classical idea of beautiful art involves the word mimesis, which can be defined as the perfection and imitation of nature. It is in nature that the perfect is implied through symmetry, equal division, and other perfect mathematical forms and notions. Plato wrote about Socrates and his ideas about how the perfect forms of things exist, and in nature we see the copy of this eternally existing form.
The need of preserving some "original nature configurations".
- Conservation ethic in relation to preserving "natural ecosystems":
- Conservationist, proponents or advocates of conservation
- Conservation movement, movement seeking to protect plant and animal species as well as the habitats they live in
- Conservation ecology, any part of ecology that has a bearing on conservation
- Conservation biology, the protection and management of biodiversity
- Environmental education
- Sustainable living
The term natural science is used in a variety of ways, primarily:
- to denote the study of natural processes as opposed to human activities, in contrast to the social sciences; and
- to denote those sciences which employ the scientific method, in contrast, for example, to mathematics or computer science.
See also: praeternatural, unnatural and supernatural.
- Climate change
- Metaphysical naturalism, any worldview in which nature is all there is and nothing supernatural exists.
- Mother nature
- Natural environment
- Natural units (Plank units)
- Naturalism (philosophy): any of several philosophical stances, typically those descended from Materialism and Pragmatism that do not distinguish the supernatural from nature. This includes the methodological naturalism of natural science , which makes the methodological assumption that observable events in nature are explained only by natural causes, without assuming the existence or non-existence of the supernatural.