Yahoo! News - The Brain May Start to Age at 40 Years
NEW YORK (Reuters Health) - US researchers studying the brains of people 26 to 106 years of age have found evidence that brain function starts to slow around age 40.

In science journal Nature, Dr. Bruce A. Yankner, from Harvard Medical School in Boston, and colleagues report that they've identified a set of genes in the brain that show reduced activity after age 40. These genes, they note, play key roles in a variety of cell functions.

According to the team, DNA damage begins to accumulate in these genes. This damage could affect vital brain activities, such as learning and memory. Moreover, this may initiate a program of brain aging "that starts early in life."

Shit. One year left.