Editing Higher-Dimensional Physics (section)

=== Historical Background ===

'''Classical Dimensions:'''  
In classical physics, space is described by three dimensions—length, width, and height—while time is treated as a separate, linear dimension. This four-dimensional framework (three spatial dimensions plus time) is the basis of Einstein’s theory of relativity, where space and time are interwoven into a four-dimensional spacetime continuum.

'''Introduction of Higher Dimensions:'''  
The idea of higher dimensions was first seriously considered in the early 20th century by Theodor Kaluza and Oskar Klein, who proposed a five-dimensional theory that combined gravity and electromagnetism. This Kaluza-Klein theory suggested that the electromagnetic force could be understood as a manifestation of geometry in a fifth dimension, though this dimension would be compactified, or "curled up," to an incredibly small scale, making it unobservable at everyday scales.