We all know we live in three-dimensional space. But what does it mean when people talk about four dimensions? Is it just a ...

A physicist proposes that time has three dimensions instead of one, which could finally unite quantum mechanics and Einstein’s relativity into a single theory. The theory makes specific, testable ...

Mathematicians are “reinventing the wheel” by giving it a new shape. Their newly imagined wheel looks like a many-dimensional guitar pick, and it could theoretically roll in ways beyond our ...