The New York Times asks: Can an old brain learn, and then rememÂber what it learns? Can it keep nimÂble and throw off the rust? HapÂpiÂly, new studÂies sugÂgest that it can, and it largeÂly comes down to nudgÂing neuÂrons in the right direcÂtion by chalÂlengÂing our ingrained perÂcepÂtions, conÂfronting new ideas, and conÂstantÂly pushÂing to disÂcovÂer new things. Get more on how to keep your mind sharp here.