Source: HistoryNet.com
1139: The Second Lateran Council opens in Rome.
1534: Jacques Cartier sets sail on a voyage to Canada in two ships with 61 men.
1769: Ottawa Chief Pontiac is murdered by an Indian in Cahokia.
1770: Captain Cook discovers Australia.
1809: Napoleon Bonaparte defeats Austria at Battle of Abensberg, Bavaria.
1841: Edgar Allen Poe's first detective story is published.
1879: The first mobile home (horse-drawn) is used in a journey from London to Cyprus.
1916: The first National League game is played at Chicago’s Wrigley Field, then known as Weeghman Park.
1931: Opening of new Welland Canal, linking Lake Erie and Lake Ontario; wide enough to carry big lakers.
1940: The first electron microscope is demonstrated.
1989: Canadian Bank Note Company prints last green $1 bills, leaving Canadians with the $1 loonie coin that began circulating in 1987.
1999: Two students enter Columbine High School in Littleton, Colorado and open fire with multiple firearms, killing 13 students and teachers, wounding 25 and eventually shooting themselves.