Out of the limelight, theoretical physicists continue to seek a mathematical model that can explain the universe's particles ...

You need 12 spots for matter particles — six quarks and six leptons ... very small dimension. Not only must string theory’s ...

then we must add most dimensions to the universe. Modern versions of string theory state that we have either ten or eleven ...

While still theoretical and highly debated, the mathematics of string theory suggests that there could be multiple dimensions of time. Columbia University's theoretical physicist Brian Greene ...

String theorists are betting that extra dimensions do indeed exist; in fact, the equations that describe superstring theory require a universe with no fewer than 10 dimensions. But even physicists ...

Greene: Sure. One of the strangest features of string theory is that it requires more than the three spatial dimensions that we see directly in the world around us. That sounds like science ...

In order for that to work, string theory has to make one more radical assumption. That instead of living in a universe with three dimensions of space and one of time, we live in one with either 9 ...

String theory is one of the most exciting and challenging areas of modern theoretical physics. This book guides the reader from the basics of string theory to recent developments. It introduces the ...