- In 1859, 24 rabbits were released in Australia. Within 6 years, the population grew to 2 million.
- Penguins have an organ above their eyes that converts seawater to fresh water.
Jean Tinguely was a Swiss sculptor best known for his kinetic art sculptural machines that extended the Dada tradition into the later part of the 20th century. Tinguely's art satirized automation and the technological overproduction of material goods.
Princess Wilhelmina of Prussia was the consort of William V of Orange and the de facto leader of the dynastic party and counter-revolution in the Netherlands. She was the daughter of Prince Augustus William of Prussia and Luise of Brunswick-Wolfenbüttel. Wilhelmina was the longest-serving Princess consort of Orange.
The steel strike of 1919 was an attempt by the weakened Amalgamated Association of Iron, Steel and Tin Workers to organize the United States steel industry in the wake of World War I. The strike began on September 22, 1919, and collapsed on January 8, 1920.
The AA had formed in 1876. It was a union of skilled steel and iron workers which was deeply committed to craft unionism. However, technological advances had slashed the number of skilled workers in both industries.