This spiral illusion seems like a chaotic intersection, but the circles never cross! What you perceive first reveals whether ...

Parallel lines are lines that never cross each other - they keep the same distance apart from each other. When two lines intersect, the opposite (X) angles are equal. On parallel lines, alternate (Z) ...

West Penn Township supervisors are hoping that something can be done to make a deadly intersection safer. One of the options would be to install a flashing signal at the intersection of routes 309 and ...