On this day in 1873, Lee De Forest was born. He was an American radio and television pioneer and the inventor of the Audion vacuum tube, which made broadcasting possible.
On this day in 1920, the US legislature ratified the 19th Amendment, giving American women the right to vote.
On this day in 1926, the American movie company Warner Brothers was successful with its premiere sound picture.
On this day in 2006, Chinese scientists unearth a 35-meter long fossil of a Mamenchisaurus dinosaur in Xinjiang. It was the the largest remains of a dinosaur found in Asia.