A study published in ScienceDirect analyzed 1,066 students to investigate relationships between tongue flexibility and cognitive abilities. ^[1] Researchers found that students with the highest scores in creativity and complex problem-solving tests more frequently possessed the ability to fold their tongues into a U-shape. ^[2] According to Gardner's theory, there are nine distinct types of intelligence: naturalistic, musical, logical-mathematical, existential, interpersonal, bodily-kinesthetic, linguistic, intrapersonal, and spatial. ^[3] Howard Gardner, an American psychologist and education researcher, developed the theory of multiple intelligences, which holds that people have multiple distinct abilities rather than a single intelligence. ^[4] Researchers stated that the ability to fold the tongue is not a definitive proof of intelligence, but rather an observed association. ^[5] The study identified that 122 students with the highest evaluation scores were able to perform the tongue-folding movement. ^[6] Gardner described existential intelligence as the intelligence of 'big questions' about human existence, but he himself did not consider it fully proven as a separate intelligence type. ^[7] The article concludes that intelligence should not be identified with a single number or ability, since different people can excel in different areas and intelligences combine. ^[8]