Jerome of Prague is burned as a heretic by the Church.
Joan of Arc is burned at the stake by the English.
The University of Marburg is founded in Germany.
Hernando de Soto lands in Florida with 600 soldiers in search of gold.
The first American daily newspaper, The Pennsylvania Evening Post, begins publishing in Philadelphia.
The First Treaty of Paris is declared, returning France to its 1792 borders.
William Young patents the ice cream freezer.
Memorial Day begins when two women place flowers on both Confederate and Union graves.
The brassiere is invented.
U.S. Marines are sent to Nicaragua to protect American interests.
The First Balkan War ends.
The U.S. Navy transfers the Teapot Dome oil reserves to the Department of the Interior.
The Royal Air Force launches the first 1,000 plane raid over Germany.
NASA launches Mariner 9, the first satellite to orbit Mars.