Tennis was originally played with bare hands before rackets were introduced in the 16th century.

The average American moves 11.7 times in their lifetime.

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

The Ramayana, one of Hinduism's great epics, tells of Prince Rama's quest to rescue his wife Sita from the demon king Ravana.

Traditional Japanese kabuki theater originally featured women actors — they were banned in 1629, and men have played female roles ever since.

BASE jumping stands for Buildings, Antennae, Spans (bridges), and Earth (cliffs).

A regulation NFL football must be inflated to between 12.5 and 13.5 psi.

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

Van Gogh sold only one painting during his lifetime.