The worst night of the Brown Dog riots in London, when 1,000 medical students, protesting against the existence of a memorial for animals that have been vivisected, clash with 400 police officers.

The Brown Dog affair was a political controversy about vivisection that raged in Britain from 1903 until 1910. It involved the infiltration of University of London medical lectures by Swedish feminists, battles between medical students and the police, police protection for the statue of a dog, a libel trial at the Royal Courts of Justice, and the establishment of a Royal Commission to investigate the use of animals in experiments. The affair became a cause célèbre that divided the country.

December 10 is the 344th day of the year in the Gregorian calendar; 21 days remain until the end of the year.