The Islamic concept of Jihad primarily refers to inner spiritual struggle — not holy war, as commonly misconceived.

The Olympic Games are held every four years.

The Mona Lisa was considered an unremarkable painting until it was stolen in 1911 — the resulting publicity made it famous.

The fastest recorded tennis serve exceeded 150 miles per hour.

Synchronized skating — where teams of up to 20 skaters perform together — is a competitive discipline not yet in the Olympics.

K-pop groups are often assembled by entertainment companies using rigorous auditions — trainees can spend years preparing.

Couples who spend quality time together regularly report higher happiness.

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

Shamanism — the practice of entering altered states to interact with spiritual worlds — is found on every inhabited continent.