> I would expect a great cultural and scientific renaissance because you could devote a lot more time to creative pursuits. Even if many people are too lazy, the few geniuses with much longer lifespans would turn the world over.

Genius appears to decline with age. Prolonging life would not necessarily preserve genius, even if it preserves life.

Unfortunately, you are correct in that brain deterioration progresses faster than other forms of deterioration, which is why it's smart to focus on it over some other age dependent diseases. Your brain is a part of your body like your heart. Any cure for aging would obviously include the cure for mental deterioration.

> Any cure for aging would obviously include the cure for mental deterioration.

I respectfully disagree. Also, the article in question, and my comment, are really pointing to prolonging life, not a cure for ageing--that may be very far off. In either case, it is not at all obvious why prolonging or curing the ageing process in life would necessarily maintain optimal neurological function.

There's also problem's outside the scientific challenge itself. One being that genius is almost always only genius after the fact, raising interesting hypothetical questions about who exactly is preserved in their genius state - a promising 20-something, or a proven 40-something?