A language is a system of arbitary signals, such as voice sounds, gestures or written symbols which communicate thoughts or feelings.

Human spoken and written languages can be described as a system of symbols (sometimes known as lexemes) and the grammars (rules) by which the symbols are manipulated. The word "language" is also used to refer to common properties of languages.

Language learning is normal in human childhood. Most human languages use patterns of sound or gesture for symbols which enable communication with others around them. There are thousands of human languages, and these seem to share certain properties, even though many shared properties have exceptions.

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NPR Topics: Politics & Society

Alaska Gov. Palin To Resign
Fri, 03 Jul 2009 19:44:00 -0400
Alaska Gov. Sarah Palin, who was Republican Sen. John McCain's running mate in the 2008 presidential campaign, says she will resign from office July 26.
Gov. Ted Strickland On Ohio's Budget Impasse
Fri, 03 Jul 2009 16:45:00 -0400
Ohio is facing a $3.2 billion shortfall in its finances. Gov. Ted Strickland has proposed slots at racetracks and spending cuts, but has not been able to reach a deal with the Legislature. The state is operating on a temporary budget for the next few days.
Rare Copy Of Declaration Found In England
Fri, 03 Jul 2009 16:00:00 -0400
An original copy of the Declaration of Independence was recently discovered in the British National Archives. Edward Hampshire, the diplomatic and colonial specialist at the archives, talks with Melissa Block about the discovery of the 26th copy of the document.

The Talk of the Town

Lauren Collins: Track School
Lauren Collins Mon, 29 Jun 2009 04:00:00 -0000
June marks the onset of what one Village resident refers to as “devil-baby season”--the time of the year when the temperature climbs and New Yorkers start doing crazy stuff. This year, the weather stayed cold, and damp. Things still got weird. On Long Island, a newborn was found . . .
James Surowiecki: Caveat Mortgagor
James Surowiecki Mon, 29 Jun 2009 04:00:00 -0000
In 1937, the Massengill Company began selling a health product called Elixir Sulfanilamide, which contained one of the antibiotic sulfa drugs. Unfortunately, it also contained diethylene glycol, a solvent that happens to be deadly to humans. In a matter of months, the elixir killed more than a hundred consumers. The . . .
Hendrik Hertzberg: Stonewall Plus Forty
Hendrik Hertzberg Mon, 29 Jun 2009 04:00:00 -0000
The most improbable of America’s mass movements for civil rights--improbable at the time, inevitable in retrospect--got its start at a most improbable hour in a most improbable place. The hour: two in the morning, forty years ago. The place: the sidewalk in front of the Stonewall Inn, a . . .

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