💡 SCIENCE BEHIND THE ILLUSION:
The Spinning Dancer (created by Nobuyuki Kayahara) is a bistable optical illusion. Because the silhouette has no depth cues (no shadows, lighting, or surface contours), your visual cortex is forced to reconstruct a 3D depth interpretation from scratch.
Neither clockwise nor counter-clockwise is "correct" your brain alternates between two equally valid mathematical hypotheses!