Note: For a definition of unfamiliar terms, see our glossary. The fundamental particles of the universe that physicists have identified—electrons, neutrinos, quarks, and so on—are the "letters" of all ...

Silly String is prohibited in Hollywood’s public places from 12:00 a.m. on Oct. 31 to 12:00 p.m. on Nov. 1. Violators face up to six months in jail and $1,000 in fines. In years past, Silly String ...

String theory began over 50 years ago as a way to understand the strong nuclear force. Since then, it’s grown to become a theory of everything, capable of explaining the nature of every particle, ...