Frida Kahlo painted 55 self-portraits — she said she painted herself because she was the subject she knew best.

The word 'ketchup' likely comes from a Chinese fish sauce called 'ke-chiap'.

The Twitter bird's official name is Larry, named after Larry Bird of the Boston Celtics.

Islam has five pillars: faith, prayer five times daily, charitable giving, fasting during Ramadan, and pilgrimage to Mecca.

Music in minor keys is perceived as sad in Western cultures but has different emotional associations in others.

The Greek god Hermes was the patron of thieves, travelers, messengers, and boundaries — a trickster deity.

The word 'OK' is one of the most recognized expressions worldwide — likely originated from a playful 19th century American abbreviation fad.

The marimba originated in Africa and was brought to Latin America during the slave trade.

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