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, untainted by human influence. Nature is the subject of scientific study.
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.
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.
James Randi Educational Foundation The JREF organization investigates claims that seem to contradict established science and attempts to verify them in controlled experimental conditions. There has been no success yet finding any evidence of anything not explainable by established science.