Why brain aging can vary dramatically between people

Researchers are uncovering deeper insights into how the human brain ages and what factors may be tied to successful cognitive aging, including exercising, avoiding tobacco, speaking a second language or even playing a musical instrument.

​ Researchers are uncovering deeper insights into how the human brain ages and what factors may be tied to successful cognitive aging, including exercising, avoiding tobacco, speaking a second language or even playing a musical instrument. Read More Breaking News, Latest News and Videos | CNN