A mind-bending image of Adele has gone viral, showcasing the 'Thatcher Effect' that tricks the brain into not recognizing inverted facial features when upside down. The phenomenon, named after Margaret Thatcher, highlights how the brain fails to detect changes in upside-down faces but can spot them when upright. London-based psychologist Dr. Julie Smith shared a video demonstrating the effect with various celebrities, garnering millions of views and comments on TikTok. The illusion, originally believed to work only on Thatcher's face, has since been shown to apply to other faces, revealing insights into face perception and cognitive processes.