Ever wondered what four dimensions really mean? Discover why knots can’t exist in 4D space — and how mathematicians use cubes and clever analogies to understand higher dimensions.

Reintroduction : View from the twenty-first century -- Augmenting a 1983 history of the fourth dimension in culture and art (1900-1950) : X-rays and ether physics as the context for the "fourth ...

Ever since Albert Einstein developed the special theory of relativity in Zurich in 1905, by «fourth dimension» one usually means time. But how can one visualize a fourth spatial dimension - in ...

Is there a way to request an ARS article explain this new discovery? I've found that ARS's science articles and comments help me understand things in a way no other internet site does, Thanks!

A group of researchers from Virginia Tech are attempting to find a fourth spatial dimension of the universe. If they succeed, their discovery would literally change how people view the world. "Since ...

(via New Scientist) For a long time now, the idea of a fourth dimension has hovered at the edge of science and science fiction, a concept so elusive and mysterious that many of us find it almost ...