.

Also to know is, how many dimensions are we living in?

three dimensions

Secondly, is there a 4th Dimension? Generally speaking, when we talk about a fourth dimension, it's considered space-time. But here, physicists mean a spatial dimension beyond the normal three, not a parallel universe, as such dimensions are mistaken for in popular sci-fi shows.

Also, what are the 26 dimensions?

One notable feature of string theories is that these theories require extra dimensions of spacetime for their mathematical consistency. In bosonic string theory, spacetime is 26-dimensional, while in superstring theory it is 10-dimensional, and in M-theory it is 11-dimensional.

What is the 11th dimension?

The 11th dimension is a characteristic of space-time that has been proposed as a possible answer to questions that arise in superstring theory. According to superstring theory, all of the elementary particles in the universe are composed of vibrating, one-dimensional mathematical objects known as strings.