Which giant relative of the dugong and manatee, found in the Bering Sea in 1741, was hunted to extinction by about 1768?

Which two-word Latin phrase means "voice of the people"? What two-word name was used for the communist regime that brutally ruled Cambodia in the 1970s? What two-word nickname was given to Florida's electric chair, built by inmates in 1923? What two-word slang name refers to Australia, the smallest continent? What two-word term is used for a hired underworld assassin? Which two-word term describes a little-known long-shot candidate who wins a nomination, as James K. Polk did in 1844? What two-word term describes a small gift tucked into a Christmas stocking? What two-word term names the soft, fluffy pad used to dab makeup onto the face?