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Kepler's laws

(Encyclopedia) CE5 Schematic representation of Kepler's second law: The areas ABF and A′B′F′ are equal and are swept out in equal intervals of time by a planet orbiting around the sun (at F).…

2013 Notable Books for Children

These books were chosen by a committee of librarians, educators, and other professionals for the Association for Library Service to Children. Younger…

Tea: China's Most Popular Export?

Where did the name Earl Grey come from? by David Johnson In prehistoric China tea was probably used as a relish and as a medicine. Tea was first brewed as a medicine around 2700 B.C. in the…

Irish Flag

What's the Symbolism of the Irish Flag? History and symbolism of the Irish tricolour by Borgna Brunner Rarely has a flag possessed such lasting relevance as that of the "Tricolour," the…

Irish Flag

What's the Symbolism of the Irish Flag? History and symbolism of the Irish tricolour by Borgna Brunner Rarely has a flag possessed such lasting relevance as that of the "Tricolour," the…

Weather: Satellites—a Far-Out Look

Satellites—a Far-Out LookWeatherRadar and SatellitesRadar—Scanning the SkiesDoppler—the New GenerationSatellites—a Far-Out LookThe Modern EraPutting It All Together If a picture is worth a thousand…

Rhode Island

Rhode Island State Facts Official Name: State of Rhode Island and Providence Plantations Entered Union: May 29, 1790 (13th State) Present constitution adopted: 1843 Fun Facts State…

Pronouns and Case: The Rules

The RulesPronouns and CaseIntroductionWhy Can't a Pronoun Be More Like a Noun?The RulesWho Versus Whom (or Should I Just Shoot Myself Now?) Let's review the rules for using pronouns so these little…

U.S. Money History

Source: The U.S. Treasury Department, Bureau of Engraving and Printing, Web: www.bep.treas.gov .1690: Colonial NotesIn the early days of this nation, before and just after the American Revolution,…