The fourth largest diamond was found in Karowe Mine, Botswana.
The diamond was named Lesedi La Rona and is 1.11 carats.
Source
The Skylab 4 mission was launched by NASA, taking a crew of three astronauts to the US space station.
Queen Elizabeth II had hip surgery at King Edward VII Hospital.
Nineteen countries vowed to gradually phase out coal at the United Nations Summit in Bonn, Germany.
The Soviet Union's Venera 3 space probe was launched from the Baikonur Cosmodrome.
The Twilight Saga: New Moon premiered in Los Angeles.