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New research suggests that consuming a diet rich in berries may help improve brain functioning and memory. The study was conducted by scientists from Tufts University who tested their thesis on rats. Results showed that rats who consumed berries performed better on memory exercises and had higher levels of dopamine. Though the findings are encouraging, more research is needed to determine whether these results apply to human beings as well.

DEFINITION: (adjective) Having keenness and forcefulness and penetration in thought, expression, or intellect. SYNONYMS: searching. USAGE: His trenchant criticism redirected the debate and gave everyone something new to consider.

Charlie "Bird" Parker was an American saxophonist and composer. As a young man, he moved to NYC to pursue a career in music. There, Parker met and played with a group of young musicians in Harlem clubs. In 1945, Parker and Dizzy Gillespie made the first bop (or bebop) records, becoming leaders of the bop movement in jazz. Parker's brilliant improvisations, noted for their power and beauty, soon earned the admiration of countless musicians. At what age did Parker begin playing the saxophone?

Hurricane Katrina made landfall along the Central Gulf Coast as a Category 3 storm on August 29, 2005. Its storm surge breached the levee system that protected New Orleans from Lake Pontchartrain and the Mississippi River, and the city was soon flooded. This and other major damage to the coastal regions of Louisiana, Mississippi, and Alabama made Katrina the most destructive and costliest natural disaster in US history. How many people died during Hurricane Katrina and the subsequent flooding?

Each problem that I solved became a rule which served afterwards to solve other problems.

Marcasite looks like pyrite and even has the same chemical formula, but it is actually a separate mineral; marcasite is paler in color, becomes darker upon oxidation, and crystallizes in the orthorhombic system. Although the term "marcasite" is often applied to small polished and faceted stones that are inlaid in sterling silver, these stones are actually pyrite; marcasite is never used in jewelry, because it has a tendency to crumble. What is "pyrite decay," and how does it affect marcasite?