Daily Content Archive
(as of Thursday, December 17, 2015)| Word of the Day | |||||||
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ampoule
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| Article of the Day | |
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 FerromagnetismFerromagnetism is a form of magnetism that can be acquired in an external magnetic field and is usually retained in its absence. Thus, ferromagnetic materials like iron and nickel are used to make permanent magnets. This type of magnetism is caused by spinning electrons in the atoms of the material, which act as tiny weak magnets. They align parallel to each other within small regions of the material to form areas of stronger magnetism. What other substances exhibit ferromagnetism? More... | |
| This Day in History | |
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 US Brigadier General James Dozier Kidnapped by Italian Terrorists (1981)In 1981, US Brigadier General James Dozier was kidnapped from his apartment in Italy by men posing as plumbers. The kidnappers were members of the Red Brigades, an extreme left-wing terrorist organization that sought to undermine the Italian state and pave the way for Marxist upheaval. Dozier, who was serving as deputy chief of staff at NATO's Southern European land forces headquarters in Verona, was the first American general ever abducted by a terrorist group. How long was he held captive? More... | |
| Today's Birthday | |
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 Sir Humphry Davy (1778)Davy was an English chemist and one of the greatest exponents of the scientific method. His discovery of the anesthetic effect of nitrous oxide was a major contribution to surgery. He did early research on voltaic cells and batteries, tanning, electrolysis, and mineral analysis, and was the first to systematically apply chemical principles to farming. His research on mine explosions and his invention of the safety lamp brought him great prestige. Davy also proved that diamond is a form of what? More... | |
| Quotation of the Day | |
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 Audiences are always better pleased with a smart retort, some joke or epigram, than with any amount of reasoning.Charlotte Perkins Gilman (1860-1935) | |
| Today's Holiday | |
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 Wright Brothers Day (2016)It was on the morning of December 17, 1903, that Wilbur and Orville Wright became the first men to fly and control a powered heavier-than-air machine. Events on December 17 traditionally include a "flyover" by military aircraft and a special ceremony held at the Wright Brothers National Memorial, a 425-acre area that features a 60-foot granite pylon on top of Kill Devil Hill, where the Wright Brothers' camp was located. The flyover takes place at precisely 10:35 AM, the time of the original flight in 1903. More... | |