The notion of dimension at first seems intuitive. Glancing out the window we might see a crow sitting atop a cramped flagpole experiencing zero dimensions, a robin on a telephone wire constrained to ...

Recent scientific discussions suggest that the fourth dimension might be concealed within our everyday perception of reality, challenging conventional views of space and time. This idea intersects ...

You write about complex electric circuits used to represent a fourth physical dimension (17 October, p 40). For a lighter take on a fourth dimension, read “–And He Built a Crooked House–” by Robert A.