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U.S. Zoos and Aquariums
Source: The facilities listed are members of, and accredited by, the American Zoo and Aquarium Association (AZA) to ensure that they are maintaining professional standards. The AZA also accredits…Space Technology 5 (U.S.)
Destination: Earth's magnetosphere. Launched: March 22, 2006. Mission: To test new technology and aid scientists in understanding Earth's magnetosphere. It is the fourth deep-space mission…New Horizons (U.S.)
Image of Pluto sent back by New Horizons. Source: NASA Destination: Pluto-Kuiper Belt. Launched: Jan. 19, 2006. Arrival: Summer 2015. Mission: To study the worlds at the edge of our solar…Deep Impact (U.S.)
Destination: Comet Tempel 1. Launched: Jan. 12, 2005. Arrival: July 4, 2005. End of project: April 2006. Mission: To look beneath the surface of a comet at material relatively unchanged from…First U.S. Satellite
The first successful U.S. satellite, Explorer I, was launched into Earth orbit by the Army on Jan. 31, 1958, at Cape Canaveral, Florida, four months after Russia orbited Sputnik. The 18-…Filibuster (U.S. Senate)
Supreme Court Related Links How a Bill Becomes a Law Three Branches of Government Checks and Balances Sometimes, senators try to defeat a bill by filibustering.…Fittest U.S. Cities
Compiled by the American College of Sports Medicine, the American Fitness Index (AFI) is a composite reflection of personal health measures, preventive health behaviors, levels of chronic disease,…U.S. Population by Race
Profile of General Demographic Here is a look at the U.S. population, based on the 2000 and 2010 U.S. Census. Population by Gender and Age | Hispanic Population | Population by…Trending
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