August 25th:
According to Wikipedia and other sources, on August 25th:
1609 – Galileo Galilei demonstrates his first telescope to Venetian lawmakers.
1768 – James Cook begins his first voyage.
1916 – The United States National Park Service is created.
1944 – World War II: Paris is liberated by the Allies.
1991 – Linus Torvalds announces the first version of what will become Linux.