Skew lines
Skew lines are straight lines that are neither parallel nor intersecting. Skew lines cannot be in the same plane. This means they exist only in at least three-dimensional geometry.
Skew Lines Media
Rectangular parallelepiped. The line through segment AD and the line through segment B1B are skew lines because they are not in the same plane.
PQ, the shortest distance between two skew lines AB and CD is perpendicular to both AB and CD
A fibration of projective space by skew lines on nested hyperboloids.
