First Electric Traffic Light
On August 5, 1914, the first electric traffic light was installed in Cleveland, Ohio. It was considered revolutionary at the time, and was soon followed by similar systems in cities around the country.
Technology
Wright Brothers Set Flight Record
On July 27, 1909, Orville Wright flew a plane a record one hour and 12 minutes. Nearly six years after their first historic powered airplane flight, the Wright brothers put their flight technology to the test, playing a major role in getting America’s Army airborne.
Birth of Alexander Calder
Sculptor Alexander Calder was born on July 22, 1898, in Lawnton, Pennsylvania. He was best known for his moving art “mobiles” stationary sculpture “stabiles” as well as monumental-sized public works.
Antarctic Treaty
On June 23, 1961, the Antarctic Treaty went into effect. Originally signed by 12 nations, it called for the peaceful use of the Antarctic Territory surrounding the South Pole.
First US Scratch-and-Sniff Stamps
On June 20, 2018, the USPS issued America’s first scratch-and-sniff stamps. Before they were issued, the stamps faced criticism from the American Lung Association…
American Architecture Series
On June 4, 1979, the USPS issued the first block of four stamps in the American Architecture Series, which honors the evolution of American architecture over the last two centuries.
JFK Calls to Put a Man on the Moon
On May 25, 1961, President John F. Kennedy delivered a speech to Congress announcing his plan to land a man on the moon by the end of the decade.
Opening of the Brooklyn Bridge
On May 24, 1883, the Brooklyn Bridge opened to traffic after 14 years of construction. It was the world’s longest suspension bridge at the time, measuring 5,989 feet.
First Successful Wireless Communication Over Water
On May 13, 1897, Guglielmo Marconi sent the world’s first wireless communication over open sea. For his pioneering work, Marconi later received the Nobel Prize in Physics.