Who first described conic sections analytically?

Apollonius of Perga

In chess, what piece can move in an L-shaped pattern? Which chemical element is represented by the symbol H? Which group invaded India by passing through the Khyber Pass around 1500 BCE? The character Cindy Lou Who appears in which well-known Christmas film? Which naval encounter marked the first U.S. victory over a British warship in the War of 1812?