September 15

This Day in History

1940

Tide Turns in Battle of Britain

Over Britain, the Royal Air Force (RAF) launches a major counterattack against the German Luftwaffe. In September 1940, the German air force launched a massive blitz against London, hoping to bomb the … (more...)

1928

Penicillin Is Discovered

Thanks largely in part to his penchant for keeping a messy lab, British bacteriologist and Nobel Laureate Sir Alexander Fleming discovered the world's most used antibiotic, Penicillin, on this day in … (more...)

1821

Central American Nations Declare Independence From Spain

This day in 1821 was an historic day for much of Central America as, after almost three centuries of colonial rule, the nations of Guatemala, El Salvador, Honduras, Nicaragua, and Costa Rica, gained … (more...)