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John Naber Bronko Nagurski James Naismith Joe Namath Ilie Nastase Martina Navratilova Cosmas Ndeti Earle (Greasy) Neale Primo Nebiolo Byron Nelson Lindsey…

U.S. Letter Rates Since the Civil War

The first U.S. postage stamps were issued on July 1, 1847. At that time, postal rates varied by distance traveled-under 300 miles, letters cost 5 cents per 1/2 oz…

The Chemistry of Biology: Lipids

LipidsThe Chemistry of BiologyIntroductionAtomic TheoryChemical Reactions: Ionic, Covalent, and Polar Covalent BondsWaterOrganic ChemistryCarbohydratesLipidsProteinsNucleic AcidsVitamins and Minerals…

DK Science: Electricity Supply

HOW ELECTRICITY DELIVERS ENERGYNETWORK CONTROL CENTRESOLAR POWERFIND OUT MOREElectricity comes to homes and workplaces through a huge network of power stations and cables. When the supply fails,…

DK Science: Television

TRANSMITTING TELEVISION SIGNALSSTRIPED SCREENFLAT SCREENDIGITAL TELEVISIONFIND OUT MORETelevision converts the image from a camera lens into a stream of data that can be sent down a cable or…

Movies and Film: A Century of Cinematic Splendor

A Century of Cinematic SplendorMovies and FilmFrench Film HistoryIt's Art, Stupid!A Century of Cinematic SplendorBefore the WarSurfing the "New Wave"The Eighties and NinetiesTen Fabulous French Films…

St. Louis, Mo.

Mayor: Francis G. Slay (to April 2017) 2010 census population (rank): 319,294 (58); Male: 154,171 (48.3%); Female: 165,123 (51.7%); White: 140,267 (43.9%); Black: 157,160 (49.2%); American Indian…