Puzzle News Study finds twist to the story of the number line: Number line is learned, not innate human intuition Can video games promote healthier aging? Math teachers demonstrate a bias toward white male students, study finds Countries that best prepare math teachers share similarities: Several key conditions generally lacking in US 'Sounds of silence' proving a hit: World's fastest random number generator To teach kids math, researcher devises ‘brain games’ Link between violent computer games and aggressiveness questioned New quantum encryption method foils hackers Mathematician publishes 2012 Major League Baseball projections