The younger generation has bigger brains than before. What does that actually mean? - Walla! health.

Research has found that our brains have grown by about 7 percent in impact compared to almost a century ago. Today, dementia affects tens of millions worldwide, and as the world's aging population grows, diagnoses of the disease are expected to triple over the next three decades. Over the past three decades, the incidence of dementia in the US and Europe has declined by about 13% each decade.