The blues scale has its roots in African musical traditions brought to America through slavery.

The Roman festival of Saturnalia — involving gift-giving, feasting, and role reversals — influenced Christmas traditions.

The oldest surviving musical composition is the Hurrian Hymn No. 6 from Syria, dating to 1400 BC.

The QWERTY keyboard layout was designed partly to slow typists down and prevent typewriter jams.

The Reformation reshaped religious life across Europe.

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

Reading a physical book before bed improves sleep quality more than reading on a screen.

In 1904, an Olympic marathon included bizarre obstacles and poor organization.

A cricket match at the Test level can last up to 5 days and still end in a draw.