In 1965 – NASA launched Ranger 9, the last in a series of unmanned lunar space probes. Ranger 9 slammed into the Moon sending back high-resolution pictures of the Lunar surface before impact.

In 1999 – Dr. Bertrand Piccard, a Swiss psychiatrist, and Briton Brian Jones landed their Breitling Orbiter 3 just after 8 AM local time 300 miles southwest of Cairo, Egypt. They became the first people to circumnavigate the globe in a hot air balloon.

In 2006 – Jack Dorsey sent the first Twitter post which read “just setting up my twttr”. Twttr was the original spelling of the site which was used internally at Odeo.com for the first 4 months.

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In 1800 – Alessandro Volta dated a letter announcing his invention of the voltaic pile to Sir Joseph Banks, president of the Royal Society, London. We’ve been dealing with battery life ever since.

In 1886 – The first alternating current power plant in the United States began providing power to Main Street in Great Barrington, Mass.

In 1916 – The Annalen der Physik received a paper titled ‘Die Grundlage der allgemeinen Relativitätstheorie’ by Albert Einstein. “The Foundation of the General Theory of Relativity” changed physics and technology dramatically.

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In 1474 – The Venetian Senate issued a Statute on Industrial Brevets that is widely considered the first patent law. Patents had been issued before, often at the whims of monarchs, but this statute codified the practice and set out a standard 10-year term.

In 1932 – The Sydney Harbour Bridge was opened. It is the world’s largest (but not the longest) steel arch bridge with the top of the bridge standing 134 metres above the harbour.

In 1991 – U.S. patent No. 5,000,000 was issued to microbiologist Lonnie. O. Ingram of the University of Florida for a process of turning garbage into fuel. His method depended on the creation of a new species of bacterium genetically formed from two other bacteria.

Like Tech History? Purchase Tom Merritt’s Chronology of Tech History at Merritt’s Books site.