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Saturday 21st of November 2009
1840s
The 1840s decade ran from January 1, 1840, to December 31, 1849.Events and trendsTechnologyFirst use of general anesthesia in an operation, by Crawford Long.The first electrical telegraph sent by Samuel Morse on May 24, 1844 from Baltimore to Washington, D.C..War, peace and politicsFirst signing of the Treaty of Waitangi (Te Tiriti o Waitangi) on February 6, 1840 at Waitangi, Northland New Zeala more...
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November 21
Events- 1905 – Albert Einstein's paper, Does the Inertia of a Body Depend Upon Its Energy Content?, is published in the journal "Annalen der Physik". This paper reveals the relationship between energy and mass. This leads to the mass–energy equivalence formula E = mc².
- 1942 – The completion of the Alaska Highway (also known as the Alcan Highway) is celebrated (however, the highway is not usable by general vehicles until 1943).
- 1969 – The first permanent ARPANET link is established between UCLA and SRI.
- 1980 – Lake Peigneur drains into an underlying salt deposit. A misplaced Texaco oil probe had been drilled into the Diamond Crystal Salt Mine, causing water to flow down into the mine, eroding the edges of the hole. The resulting whirlpool sucked the drilling platform, several barges, houses and trees thousands of feet down to the bottom of the dissolving salt deposit.
- 2004 – The island of Dominica is hit by the most destructive earthquake in its history. The northern half of the island receives the most damage, especially the town of Portsmouth. It is also felt in neighboring Guadeloupe, where one person is killed.
- 2004 – The Paris Club agrees to write off 80% (up to $100 billion) of Iraq's external debt.
Births- 1922 – Abe Lemons, American basketball coach (d. 2002)
Deaths- 1652 – Jan Brożek, Polish mathematician, physician, and astronomer (b. 1585)
- 2007 – Tom Johnson, Canadian ice hockey player (b. 1928)
Holidays and observances
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