Watch closely as they shift–are there 12 or 13 men?
Dr. Richard Wiseman
Seeing flickering black dots is an illusion. Only white dots appear in this photo. The sensation of black dots is an expectation created by the adjacent–and more voluminous–black squares. Your brain fills in the color black into the small white dots.
Designed for a special gathering honoring Martin Gardner, mathematical game and puzzle genious. The paper dragon is completely stationary and the head never moves–even though you’ll think it does.