Saul-Paul Sirag reviews the history of our understanding of higher dimensions, from early ideas of the "fourth dimension" to the early 20th century dimensional theory that proved to be successful in unifying electromagnetism and gravity. This search for unification has lead to continued exploration of higher dimensional space.

Saul-Paul Sirag is a theoretical physicist who has developed a model utilizing hyperspace to unify Einstein's theory of general relativity with quantum mechanics.