If extra dimensions of space exist, they must be smaller than about half the width of a human hair, according to new measurements of the strength of gravity at short distances. Researchers found that ...

Meet the Bizarro universe version of a black hole: a black string. Subscribe to read this story ad-free Get unlimited access to ad-free articles and exclusive content. These hypothetical objects might ...

String theory is a purported theory of everything that physicists hope will one day explain … everything. All the forces, all the particles, all the constants, all the things under a single ...