Editing Natural science (section)

===Physics===
{{Main|Physics|Outline of physics#Branches of physics}}
[[File:HAtomOrbitals.png|thumb|The [[Atomic orbital|orbitals]] of the [[hydrogen atom]] are descriptions of the [[probability distribution]]s of an [[electron]] [[bound state|bound]] to a [[proton]]. Their mathematical descriptions are standard problems in [[quantum mechanics]], an important branch of physics.]]
Physics embodies the study of the fundamental constituents of the [[universe]], the [[forces]] and interactions they exert on one another, and the results produced by these interactions. Physics is generally regarded as foundational because all other natural sciences use and obey the field's principles and laws. Physics relies heavily on [[mathematics]] as the logical framework for formulating and quantifying principles.

The study of the principles of the universe has a long history and largely derives from direct observation and experimentation. The formulation of theories about the governing laws of the universe has been central to the study of physics from very early on, with [[philosophy]] gradually yielding to systematic, quantitative experimental testing and observation as the source of verification. Key historical developments in physics include [[Isaac Newton]]'s [[Law of universal gravitation|theory of universal gravitation]] and [[classical mechanics]], an understanding of [[electricity]] and its relation to [[magnetism]], [[Albert Einstein|Einstein]]'s theories of [[special relativity|special]] and [[general relativity]], the development of [[thermodynamics]], and the [[quantum mechanics|quantum mechanical]] model of atomic and subatomic physics.

The field of physics is vast and can include such diverse studies as [[quantum mechanics]] and [[theoretical physics]], [[applied physics]] and [[optics]]. Modern physics is becoming increasingly specialized, where researchers tend to focus on a particular area rather than being "universalists" like [[Isaac Newton]], [[Albert Einstein]], and [[Lev Landau]], who worked in multiple areas.