Oh, and this imagined world has 11 dimensions, not the four dimensions – up/down, left/right, backwards/forwards and time – we have in our so-called real world.

According to string theory, there are at least 10 dimensions of space, most of which are impossible for humans to perceive.

In order for the math to work, string theory requires that there be 10 dimensions: nine of space and one of time.

How can the string theory's requirement for extra dimensions possibly be reconciled with our everyday experiences in the universe? Curled up and compact ...

To summarize, string theory says that there are 11 dimensions. We know of 4 physical dimensions, and there are in addition 7 other dimensions.

Physicists have a new scenario of the universe's expansion at the Big Bang that may explain why our universe has three large spatial dimensions.

The conventional method to validate string field theory, is by use of quantum mechanics. However, the researchers worked backwards, using string field theory to validate quantum mechanics.

Physicists have a new scenario of the universe's expansion at the Big Bang that may explain why our universe has three large spatial dimensions.

Here’s why the hope of String Theory, when you get right down to it, is nothing more than a broken box of dreams.

Theorists have been working on the idea since the 1960s, and one of the first things they realized is that for the theory to work, there have to be more dimensions than the four we're used to.