On this day in 1883, the Metropolitan Opera House in New York City opened with a performance of Gounod's Faust.
On this day in 1968, Apollo 7 safely splashed down in the Atlantic Ocean after orbiting the Earth 163 times.
On this day in 1976, Red Dye No. 4 was banned by the US Food and Drug Administration after it discovered that the dye causes tumors in the bladders of dogs. The dye is still used in Canada.
On this day in 2013, the Australian Capital Territory became the first Australian jurisdiction to legalize same-sex marriage with the Marriage Equality Act 2013.