Karl Ferdinand Braun shared the 1909 Nobel Prize in Physics for work on wireless telegraphy with which Italian?

What two-letter symbol stands for a medical prescription? In which U.S. territory did two locomotives meet for the 1869 "golden spike" ceremony completing the first transcontine… New York's two major airports, JFK and LaGuardia, both lie on which island? Which two boxers named Sugar Ray won world welterweight titles, one in 1946 and the other in 1979? Which two astronauts walked on the moon on July 20, 1969? In 1924, two new place names honoring the same man appeared on the Soviet map: Ulyanovsk and which other? Which of these is one of the three classical orders of ancient Greek architecture? Two of John Brown's sons were killed during his October 1859 attack on the federal arsenal at which site?