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I-M

Jovita IdarSamuel Elmer ImesTopa IncaIshiDaniel “Chappie” James, Jr.Mae C. JemisonGish Jen Thomas L. JenningsFrederick McKinley JonesBarbara Charline JordanPercy Lavon JulianJohanna July Betty Mae…

meson

(Encyclopedia) mesonmesonmēˈzŏn [key] [Gr.,=middle (i.e., middleweight)], class of elementary particles whose masses are generally between those of the lepton class of lighter particles and those of…

S - U

Russell SageYves Saint-LaurentHaym SalomonSir Titus SaltPaul A. SamuelsonWilliam SaveryJean Baptiste SayMarjorie ScardinoHjalmar Horace Greeley SchachtAlbert SchäffleElsa SchiaparelliJacob Henry…

DK Science: Genetics

LOCATION OF CHROMOSOMES CHROMOSOME STRUCTURE DNA DOUBLE HELIX CHROMOSOME SET GENES INHERITANCE FIND OUT MORE Genetics is the study of the instructions, contained in cells, for how our…

Allen, Ethan

(Encyclopedia) Allen, Ethan, 1738–89, hero of the American Revolution, leader of the Green Mountain Boys, and promoter of the independence and statehood of Vermont, b. Litchfield (?), Conn. He had…

Tammany

(Encyclopedia) TammanyTammanytămˈənē [key] or Tammany Hall, popular name for the Democratic political machine in Manhattan. Tammany suffered a telling defeat in the election of 1932 and did not…

Saratoga campaign

(Encyclopedia) Saratoga campaign, June–Oct., 1777, of the American Revolution. Lord George Germain and John Burgoyne were the chief authors of a plan to end the American Revolution by splitting the…

U.S. Landmarks

Find out when some of the most historical sites in the U.S. became national landmarks. by Jennie Wood The U.S. began the National Historic Landmark Program to recognize and preserve the…