Around 1800, Parson Mason Weems told a famous story of which future president chopping down a cherry tree as a boy?

Which great Baroque composer wrote six "English Suites" for harpsichord? According to tradition, the Shang dynasty arose around 1766 B.C. in the valley of which Chinese river, also called the… Around 1780, which grandfather of Charles Darwin invented a pyrometer to measure the high heat in his kilns? Around 1784, Henry Cavendish found that hydrogen exploding with air produced which substance? Around 1800, which scientist from Como, Italy, built a forerunner of the electric battery? Around 1807, John Colter explored the Yellowstone area after leaving which famous expedition? In 1814, which composer set Goethe's "Gretchen am Spinnrade" to music? In 1817, Giovanni Battista Caviglia led an excavation to free the Great Sphinx of Giza from what?