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Carcassonne

(Encyclopedia) Carcassonne Carcassonne kärkäsônˈ [key], city, capital of Aude dept., S France, in Languedoc. The old…

Weinberg, Steven

(Encyclopedia) Weinberg, Steven, 1933–, American nuclear physicist, b. New York City, Ph.D. Princeton, 1957. Since 1982 he has been a professor at the Univ. of Texas at Austin, having previously been…

DK Science: Pitch

HEARING ABILITYDOPPLER EFFECTULTRASOUNDFIND OUT MORESound can be low-pitched, like the rumble of a large truck, or high-pitched, like a whistle. The pitch of a sound depends on the frequency of…

Barcode Firsts

The Question: What product was the first to be purchased by scanning its barcode? The Answer: The first step toward today's bar codes and bar…

Jonathan SCOVILLE, Congress, NY (1830-1891)

SCOVILLE, Jonathan, a Representative from New York; born in Salisbury, Litchfield County, Conn., July 14, 1830; attended various educational institutions in Massachusetts, including the…

DK Science: Molecules

VARIETY OF MOLECULESSIMPLE MOLECULECOMPLEX MOLECULEBONDINGCHANGING MOLECULESFIND OUT MOREMost atoms join up with other atoms through chemical BONDS to form larger particles called molecules. They…

Kirby, Jack

(Encyclopedia) Kirby, Jack, 1917–94, American comic-book artist famous for the strongly drawn, brilliantly colored, and surprisingly human superheroes and villains he created or co-created, b. New…