Daily Content Archive

(as of Sunday, February 13, 2011)
Word of the Day

off-licence

Definition:(noun) A store that sells alcoholic beverages for consumption elsewhere.
Synonyms:liquor store, package store
Usage: He went into an off-licence to buy a bottle of cider.
Article of the Day

Holography

Holography is the method of producing a three-dimensional image, called a hologram. A hologram is created by first splitting a laser beam. Half the beam is recorded on a plate, unaltered, and the other half is recorded after it is reflected off the object being imaged. On the recording plate, the two systems of light waves reinforce or neutralize one another, creating an interference pattern that, when illuminated by light of the same frequency, produces a hologram. Who invented holography? More...
This Day in History

Thomas Edison Observes the Edison Effect (1880)

Known as "the Edison Effect," thermionic emission is the emission of electrons or ions by substances that are highly heated. The charged particles that are emitted are called thermions, and their number rapidly increases with the temperature of the substance. If the heated substance that emits thermions carries a charge, the thermions will carry the same charge. The effect was observed by Edison in 1883 when he was working on what invention? More...
Today's Birthday

Sir Joseph Banks (1743)

Banks was a British naturalist, botanist, and patron of the sciences. After inheriting a large fortune in his early 20s, he began traveling extensively, collecting plant and natural history specimens. He outfitted and accompanied James Cook's voyage around the world, during which time he collected many biological specimens that had never before been classified. His herbarium, one of the most important in existence, and library are now at the British Museum. What plant genus was named after him? More...
Quotation of the Day
I think the first duty of society is justice.

Alexander Hamilton (1755-1804)

Idiom of the Day

crushing blow

A major defeat or setback that is devastating to the goals of a person, group, or organization. More...
Today's Holiday

Washington's Birthday Celebration

Every year, Alexandria, Virginia, hosts an array of activities devoted to George Washington, including the nation's largest parade honoring the father of the country. The first parade to honor him was in 1798, when he came from his Mt. Vernon home to review the troops in front of Gadsby's Tavern. The present-day festivities get off to an elegant start over the weekend with a banquet followed by the George Washington Birthnight Ball in Gadsby's Tavern, a duplication of the birthday-eve parties held in Washington's lifetime. On Monday is the big parade. More...
In the News

Testosterone Interferes with Ability to Empathize

In a recent study, women given a small dose of the male sex hormone testosterone were less able to judge people's moods based on their facial expressions, suggesting that the hormone interferes with the ability to empathize with others. The women who did the worst after receiving the testosterone were those who had features which indicated that they had been exposed to higher testosterone levels in the womb. The findings seem to support the theory that testosterone—particularly exposure to the hormone in utero —plays a role in the development of autism, a developmental disorder characterized by severe deficits in social interaction and communication. More...
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