48 years ago, Jingle Bells became the first song performed by humans in space.

December 16, 1965: Walter Schirra, in orbit in Gemini 6, reported to Mission Control that he saw Santa Claus reentering the Earth's atmosphere over the North Pole. Then he and his crewmate, Thomas Stafford, used a harmonica and set of six sleighbells they'd smuggled onboard, and sang Jingle Bells: the first human song performed in space.

The harmonica and bells are now on display at the Smithsonian.

Full story: http://nowiknow.com/jingle-all-the-way/