Most people form long-term relationships with someone within their social circle.

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

Aboriginal Australians have oral traditions and songlines that preserve ecological knowledge going back tens of thousands of years.

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

The Epic of Gilgamesh contains a flood narrative strikingly similar to the biblical story of Noah.

In Thailand, it's illegal to step on currency because the king's face is on it.

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

Roughly 10% of people are left-handed.

The fastest tennis serve ever recorded was by John Isner at 253 km/h (157.2 mph).