The London Underground's Great Northern, Piccadilly and Brompton Railway opened.
The first historically Black intercollegiate Greek-lettered fraternity, Alpha Phi Alpha, was founded.
Theodore Roosevelt became the first US president to visit another country while in office, visiting Puerto Rico and Panama.
The International Radiotelegraph Conference in Berlin selected 'SOS' (· · · – – – · · ·) as the global standard for radio distress calls.
Black soldiers were blamed for raiding a bar in Brownsville, Texas, US.
A patent was awarded to Willis Carrier, which gave us the world’s first Air Conditioner.