By the early 1990s, string theorists had developed not one, not two, but five different versions of string theory. The variations were based on how a fundamental string was treated.

Consumer Reports reveals the best string trimmers you can buy right now. Our tests find that you don't have to pay a lot to get a capable string trimmer.

Under normal use, you need to advance your string trimmer’s nylon cutting string whenever the tool isn’t cutting effectively. That happens every few minutes or even quicker in tall grass and ...

String theory's equations give rise to a near infinite variety of potential universes in a 'landscape.' This landscape is surrounded by a 'swampland' of solutions that are incompatible with any ...

String theory requires that space-time have 10 dimensions; LQG doesn’t work in higher dimensions. String theory also implies the existence of supersymmetry, in which all known particles have yet ...