I was wondering what the fourth dimension might be, if a point is 0, a line 1, a square 2, a cube 3 dimensional. What would a 4 dimensional "cube" look like? My thinking went that if a metre cube sat in the same position this could be it. But would that be a cubic metre x second? So I googled metre second and found this link.. so if you know what a four dimensional cube looks like, let me know.