New posts in Spacetime Dimensions

How to prove that we are living in a 3+1D world?

How is graphene a 2D substance?

Gravity in other than 3 spatial dimensions and stable orbits

How exactly do superstrings reduce the number of dimensions in bosonic string theory from 26 to 10 and remove the tachyons?

Why are so many forces explainable using inverse squares when space is three dimensional?

More than one time dimension

Intuition for multiple temporal dimensions

Can light exist in $2+1$ or $1+1$ spacetime dimensions?

Why does string theory require 9 dimensions of space and one dimension of time?

Measuring extra-dimensions