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The Seasons

The seasons are caused by the tilt of Earth's axis (23.4°) and not by the fact that Earth's orbit around the Sun is an ellipse. The average distance of Earth from the Sun is 93 million miles; the…

World Geography Glossary

Find the definition of geography terms and phrases. geography The study of the physical features of the earth. Includes study of regional formations and their relation to humans. latitude…

The Supreme Court: Killing Gun Control

Killing Gun ControlThe Supreme CourtSeparating Government PowersWho's in Control—the States or the Federal Government?Killing Gun ControlSupporting Family LeaveAccepting Homosexuality…

2013 World News: China

Geopolitical Maritime Dispute Shares Headlines with Change of Leadership by Beth Rowen Xi JinpingRelated Links China Country Profile 2013 Year in…

planetary system

(Encyclopedia) planetary system, a star and all the celestial bodies bound to it by gravity, especially planets and their natural satellites. Until the last decade of the 20th cent., the only…

Shanghai

(Encyclopedia) ShanghaiShanghaishăngˈhīˈ, shängˈhīˈ [key], city and municipality (2010 pop. 23,019,148), in, but independent of, Jiangsu prov., E China, on the Huangpu (Whangpoo) River where it flows…

U.S. Daylight Saving Time Schedule

The United States. Daylight saving time, also called “summer time,” is the practice of advancing clocks forward by one hour in the spring to gain additional daylight during the early evening. In the…

Anatomy and
Physiology: The Parts of a Bone

The Parts of a BoneAnatomy and PhysiologyThe BonesThe Parts of a BoneThat's the Long and Short of ItThe More Things Change …Now with a Self-Repairing Option! Most people envision bone as being…

The Islamic (Hijri) Calendar

The Islamic calendar is based on the lunar year of about 354 days. The number of days each month is adjusted according to the lunar cycle, beginning about two days after the new moon. The months…