On August 20, 1920, Detroit’s 8MK radio station began daily broadcasts. Still in operation today, the station often claims to be the first commercial radio station, though a few others have also staked their claim on that title.
On August 12, 1918, the US Post Office Department took over control of airmail service from the US Army Air Service. Under the Post Office Department, the service flourished, leading to transcontinental airmail service, which was eventually taken over by private companies.
On August 6, 1991, Tim Berners-Lee published the first-ever website, heralding the start of the world wide web. The web has grown to over 1.8 billion websites today, and continues to grow every day.
On July 28, 1897, Alexander Winton began a nine-day test-drive of his automobile, proving its reliability to investors. Winton went on to become the top-selling automobile manufacturer for several years. He had more than 100 patents, and often allowed others to use them for free when safety was involved.
On June 18, 1855, the first ship passed through the Soo Locks, located on the St. Mary’s River between Lake Superior and Lake Huron. Today there are four locks, and an average of 10,000 ships pass through them each year.
On May 28, 1937, the Golden Gate Bridge officially opened to traffic. It was the longest suspension bridge in the world at the time of its opening and was dubbed a “Wonder of the World” structure.
On May 24, 1844, Samuel Morse sent the first message over telegraph. While in the Supreme Court chamber of the US Capitol, he sent the message “What hath God wrought!” over the telegraph to his assistant in Baltimore, Maryland.
Inventor Ottmar Mergenthaler was born on May 11, 1854, in Hatchel, Kingdom of Württemberg (present-day Baden-Württemberg). Mergenthaler invented the linotype machine, which made it quicker and easier to set complete lines of type for printing presses, revolutionizing printing in the 19th century.
On May 3, 1911, Wisconsin passed America’s first worker’s compensation program. This law provided financial security for workers injured on the job. By 1948, all the then-48 US states had passed such laws. Alaska and Hawaii had workmen’s compensation laws when they joined the Union.