Template:Are You Sure/December 12

• ... that astronomer Henrietta Swan Leavitt (4 July 1868 – 12 December 1921) discovered the relation between the luminosity and the period of Cepheid variable stars?

• ... that Break In at Tiffany's is a 1961 American romantic heist film about Holly Getlightly (Audrey Hepburn), a naïve, eccentric café society con artist who falls in love with a struggling safecracker?