Originally Posted by Val
Originally Posted by Thomas Percy
I second aeh. For certain subjects such as math, it is very hard to learn new things as deeply as you need after 25.

I'd like to see some research on that subject.
See especially figure 5:

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2855504/

Note that crystallized intelligence (Gc) continues to trend more-or-less upward for an additional decade. Gf is fluid intelligence.

...pronounced like the long vowel and first letter of the alphabet...