Gum has been studied for its beneficial effects on memory, alertness, anxiety reduction, appetite suppression, mood and learning.

FORBES: Chew Yourself a Better Brain

In it, the therapist describes the child as an apparently "typical 5-year-old by temperament and interests" with no history of mood swings, irritability, depression, attention deficit disorder, learning issues or other problems.

CNN: STORY HIGHLIGHTS

Although the main performance practice of Iranian traditional music unfolds through improvisation according to the mood of the performer and in response to the audience, musicians spend years learning to master the radif as the set of musical tools for their performances and compositions.

UNESCO: Intangible Cultural Heritage