Why, they ask, do we live in 3 dimensions of space and not 2, 10 or 25?

There would also be problems with more than three space dimensions.

My most recent research is about extra dimensions of space.

In addition, biological research questions have important dimensions of time and space.

Why do we see only three space dimensions and one time dimension?

Why does the universe appear to have one time and three space dimensions?

Two space dimensions do not seem to be enough to allow for the development of complicated beings like us.

This result can then be used to obtain the solution in two space dimensions.

Nothing can exist without some dimension of space and time.

John ran in another dimension of time and space.