Intermediate Word:  recidivist  (a) chronic traveler   (b) tendency to relapse into criminal behavior  (c) collector of bus transfers  (d) remittance man
Difficult Word: -acromion  (a) finial  (b) ridgeline of a roof  (c) outer extremity of the shoulder  (d) topmost peak of a church tower

Dark Matter and Black Holes: New Insight into the Galactic Center - Space.com  A pair of studies peering at the center of our Milky Way has allowed astronomers to trace a long-standing radiation fog to its black hole roots and provided new evidence for elusive dark matter at the galaxy's core. In the first study, researchers found there were several sources of a diffuse glow of "soft" gamma radiation emanating from the galactic center. "We don't know what exactly they are,"
Era Ends: Looking Back on Project Phoenix - Space.com  Project Phoenix has left the building. Phoenix rose from the ashes of the NASA SETI Program that was terminated by the US Congress in 1993. The SETI Institute secured use of some of the search equipment developed for NASA under a long-term loan agreement and raised private funds to conduct a search. Phoenix observed hundreds of stars over billions of frequency channels, with high sensitivity, and real-time signal detection and verification.

NASA Explains "Dust Bowl" Drought - Space.com  NASA scientists have an explanation for one of the worst climatic events in the history of the United States, the "Dust Bowl" drought, which devastated the Great Plains and all but dried up an already depressed American economy in the 1930's. The study found cooler than normal tropical Pacific Ocean surface temperatures combined with warmer tropical Atlantic Ocean temperatures to create conditions in the atmosphere that turned America's breadbasket into a dust bowl from 1931 to 1939. The team's data is in this week's Science magazine.

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