Best Blog Posts

Google Blogoscoped has a collection of some of the best blog posts ever: “I asked several bloggers about their most popular, or one of their most popular, blog posts the kind that made an impact on people, had skyrocketing traffic numbers, or triggered a meme or changes. Here are their answers.”

Keeping Brains Fit

WSJ writes:

The key to keeping intellectually sharp as we age may not be mental gymnastics, as commonly recommended, but real gymnastics.

According to a new study, the brain’s long, slow decline may not be inevitable. For the first time, scientists have found something that not only halts the brain shrinkage that starts in a person’s 40s, especially in regions responsible for memory and higher cognition, but actually reverses it: aerobic exercise. As little as three hours a week of brisk walking — no Stairmaster required — apparently increases blood flow to the brain and triggers biochemical changes that increase production of new brain neurons.