Daily Content Archive
(as of Thursday, May 25, 2017)| Word of the Day | |||||||
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floorwalker
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| Daily Grammar Lesson | |
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Perfective and Imperfective AspectThe perfective aspect highlights actions, states, or events as a whole. The imperfective aspect is used when we focus on the internal structures of an action. What is the continuous aspect? More... | |
| Article of the Day | |
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 Iris RecognitionIris recognition, not to be confused with retinal scanning, is a type of biometric authentication that uses pattern recognition techniques to analyze the irises of an individual's eyes. Iris recognition is rarely impeded by glasses or contact lenses and has a staggering accuracy rate when it comes to yielding unambiguous identifications. In fact, the eyes have been described as the ideal human body part for biometric identification. What advantages does iris recognition have over fingerprinting? More... | |
| This Day in History | |
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 "Spider Dan" Scales 110-Story Sears Tower (1981)After witnessing a deadly high-rise hotel fire, Dan Goodwin resolved to call attention to the need for better skyscraper firefighting and rescue techniques. Six months after the blaze, he donned a homemade Spider-Man suit and, using suction cups and climbing gear, began an ascent of Chicago's Sears Tower—then the world's tallest building. He reached the top seven hours later and was promptly arrested. What structure—formerly the world's tallest—did he climb with no equipment, twice in one day? More... | |
| Today's Birthday | |
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 Igor Sikorsky (1889)After studying engineering in Kiev, Sikorsky devoted himself to developing the helicopter. In 1910, after failing to build a workable model, he turned to fixed-wing airplane design, and, several years later, he built and flew the first multi-motored plane, a four-engine aircraft with an innovative enclosed cabin. Sikorsky immigrated to the US in 1919 and had continued success designing airplanes. How long would it be before he finally realized his dream of building his first working helicopter? More... | |
| Quotation of the Day | |
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 Great minds have purposes; others have wishes. Little minds are tamed and subdued by misfortune; but great minds rise above them.Washington Irving (1783-1859) | |
| Idiom of the Day | |
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king of the jungle— The lion, especially in cultural or artistic depictions. (Usually a misnomer, as lions typically inhabit deserts or dry forests, as opposed to jungles.) More... | |
| Today's Holiday | |
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 Argentine National Day (2021)Argentina was one of a number of Spanish colonies controlled by the Spanish viceroy in Lima, Peru. On May 25, 1810, Buenos Aires declared its independence from the viceroyalty but continued to pledge loyalty to the Spanish crown. May 25 is observed throughout the country as the anniversary of the revolution; independence from Spain wasn't declared until July 9, 1816. Both days are national holidays and are observed with religious services at the cathedral and special performances at the Colón Theatre in Buenos Aires. More... | |
| Word Trivia | |
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Today's topic: musical instrumentpiano word - One in which all of its letters can be played as notes on a musical instrument (e.g. cabbage). More... cord, chord - Cord comes from Greek khorde, "gut, string of a musical instrument," and chord is a refashioning of cord. More... sweet potato - An informal name for the ocarina, a musical instrument. More... tone color - The same as timbre, the quality of sound that distinguishes one voice or musical instrument from another. More... | |