Physicists have determined that most of the universe is dark matter -- invisible to us but affecting the universe anyway. Could it exist in another dimension?

A team of German and Spanish scientists says they’ve found a “natural explanation” for dark matter and other unresolved scientific mysteries — but their work depends on the existence of a new ...

Researchers attempting to solve the problem of dark matter have proposed a particle that can travel to an unseen fifth dimension. The work is entirely hypothetical, as it attempts to explain a type of ...