The Burning Man festival leaves no trace — participants pack out everything they bring in.

Dressage — precision horse riding — scores horses and riders on over 30 individual movements in a freestyle routine.

Music exists in every known human culture.

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

The informal economy in developing countries often employs more people than the formal sector.

In Aboriginal Australian mythology, the Dreamtime is not a historical past but an ongoing spiritual dimension.

Sumo wrestlers follow a strict lifestyle governed by the Sumo Association, including how they eat, dress, and live.

Couples who spend quality time together regularly report higher happiness.

The Vikings used to give kittens to new brides as essential household gifts.