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DEFINITION: (noun) A rural idiom or expression. SYNONYMS: rusticism. USAGE: He was a country poet whose verses were filled with ruralisms.

Believing that Asia could be reached by traveling westward, Columbus' 3-ship expedition set sail from Palos, Spain in 1492. After a stop at the Canary Islands, Columbus sailed due west, turning in a more southerly direction after about 4 weeks at sea. Shortly thereafter, Columbus quelled a small mutiny and, on October 12, landed at an island in the Bahamas. Columbus also explored nearby Cuba and Hispaniola before returning to Spain. How many ships set sail with his second expedition?

Dark matter is a hypothetical form of matter that is believed to make up more than 90% of the mass of the universe but is not readily visible because it neither emits nor absorbs light. Its existence could explain gravitational anomalies observed in the motion and distribution of galaxies. In 1993, astronomers identified part of the dark matter in the form of stray planets and brown dwarfs, and, possibly, stars that have failed to ignite. What acronym is used to refer to this hot, dark matter?