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51Physical Sciences — ▪ 2009 Introduction Scientists discovered a new family of superconducting materials and obtained unique images of individual hydrogen atoms and of a multiple exoplanet system. Europe completed the Large Hadron Collider, and China and India took… …
52Compact Cassette — A TDK D C60 cassette, a common speech quality tape with a 60 minute playing time, in a housing similar to that of the original Compact Cassette specification …
53War of the Third Coalition — Infobox Military Conflict conflict=War of the Third Coalition partof=Napoleonic Wars caption= Napoléon at the Battle of Austerlitz , by François Pascal Simon, Baron Gérard. date=1805 place=Central Europe, Italy, and Trafalgar result=French… …
54Hayabusa — This article is about the spacecraft. For other uses, see Hayabusa (disambiguation). Hayabusa A computer rendering of Hayabusa above Itokawa s surface Operator …
55United States Army Air Service — Infobox Military Unit unit name=United States Army Air Service caption= dates=1918 05 24 to 1926 07 02 country= United States of America allegiance= branch=United States Army type= role= size= 195,024 men, 7,900 aircraft (1918) 9,954 men, 1,451… …
56United States — a republic in the N Western Hemisphere comprising 48 conterminous states, the District of Columbia, and Alaska in North America, and Hawaii in the N Pacific. 267,954,767; conterminous United States, 3,022,387 sq. mi. (7,827,982 sq. km); with… …
57Battle of the Atlantic (1939–1945) — Infobox Military Conflict conflict = Battle of the Atlantic partof = World War II caption = Officers on the bridge of an escorting British destroyer keep a sharp look out for enemy submarines, October 1941 date = September 3 1939 May 7 1945 place …
58Henry W. Howgate — Infobox Military Person name=Henry W. Howgate caption= born=ca. 1834 died=June 2 1901 placeofbirth= placeofdeath=Washington, D.C. nickname=(alias) H.W. Harrison , Henry Williams allegiance= branch= United States Army Signal Corps… …
59Germany — /jerr meuh nee/, n. a republic in central Europe: after World War II divided into four zones, British, French, U.S., and Soviet, and in 1949 into East Germany and West Germany; East and West Germany were reunited in 1990. 84,068,216; 137,852 sq.… …
60ancient Greek civilization — ▪ historical region, Eurasia Introduction the period following Mycenaean civilization, which ended in about 1200 BC, to the death of Alexander the Great, in 323 BC. It was a period of political, philosophical, artistic, and scientific… …
