The sitar, fundamental to Indian classical music, has 21 strings — 7 played and 14 sympathetic.

The NFL Super Bowl is consistently one of the most-watched annual sporting events in the United States.

Van Gogh sold only one painting during his lifetime.

Calligraphy is considered one of the highest art forms in East Asian, Middle Eastern, and European medieval traditions.

The Mona Lisa has no eyebrows — it was fashionable to shave them in 15th-century Florence.

The concept of karma — actions determining future circumstances — appears in Hinduism, Buddhism, Jainism, and Sikhism.

Van Gogh only sold one painting in his lifetime.

Many world mythologies feature a world tree connecting different realms — Yggdrasil in Norse myth, Ashvattha in Hinduism.

Coyote is a trickster figure in dozens of Native American mythologies across North America.