2000 The discovery of Argon fluorohydride, the first Argon compound ever known, was announced in the journal Nature by Finnish scientists at the University of Helsinki. The team was led by Markku Räsänen.
1963 The 200-metre freestyle was swum in less than 2 minutes for the first time by American Don Schollander (1:58). He would go on to win four gold medals and set three world records at the 1964 Summer Olympics in Tokyo.
1932 Amelia Earhart took off from Los Angeles on the first non-stop flight by a woman across the United States. She landed the next day in Newark, New Jersey after flying 2,447.8 miles in 19 hours and 5 minutes.
1875 Captain Matthew Webb began a swim across the English Channel by diving in from the Admiralty Pier at Dover. 22 hours later he arrived near Calais, France, thereby becoming the first person to swim across the channel.
1815 King William I of the Netherlands issued the first version of the current constitution of the Netherlands, the Grondwet voor het Koningrijk der Nederlanden or Loi fondamentale du Royaume des Pays-Bas, establishing the United Kingdom of the Netherlands.