At the 1851 world's fair in London, which American photographer won a medal for his daguerreotypes?

At sea level, average atmospheric pressure is about 1013 of which units? A plaque at St. Petersburg-Clearwater airport marks the 1914 sale of the first airline ticket, in which state? At Stanley, the capital of which island group, did Argentine forces surrender to the British on June 14, 1982? At Sutton Hoo in England, a burial mound excavated in 1939 held the remains of a 90-foot-long what? At the 1855 world's fair in Paris, which man's sewing machine won first prize? At the 1880 Republican convention, which former two-term president led on each of the first 35 ballots before James Gar… At the 1889 Paris Exposition, a large share of the U.S. exhibit space showcased which inventor's work, including his ph… At the 1896 Democratic convention, William Jennings Bryan told delegates "You shall not crucify mankind upon" what?